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https://api.github.com/repos/pandas-dev/pandas/issues/32517
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577,333,398
MDExOlB1bGxSZXF1ZXN0Mzg1MTQzODM3
32,517
CLN: Suppres compile warnings of pandas/io/sas/sas.pyx
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4
2020-03-07T13:15:03Z
2020-03-13T16:59:08Z
2020-03-12T04:46:18Z
MEMBER
null
- [x] ref #32163 - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry --- This is the warning that get removed: ``` pandas/io/sas/sas.c: In function ‘__pyx_f_6pandas_2io_3sas_4_sas_rdc_decompress’: pandas/io/sas/sas.c:3732:65: warning: ‘__pyx_v_ctrl_bits’ may be used uninitialized in this function [-Wmaybe-uninitialized] 3732 | __pyx_t_8 = (((__pyx_v_ctrl_bits & __pyx_v_ctrl_mask) == 0) != 0); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~ ```
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577,336,630
MDExOlB1bGxSZXF1ZXN0Mzg1MTQ2MTA2
32,518
CLN: removed unused import
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5
2020-03-07T13:43:01Z
2020-03-14T14:06:31Z
2020-03-12T17:24:36Z
MEMBER
null
- [ ] closes #xxxx - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry --- Not 100% sure about this, can close anytime if not a good PR
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577,357,344
MDExOlB1bGxSZXF1ZXN0Mzg1MTYwMzg5
32,519
TST: fix test creating invalid CategoricalBlock
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1
2020-03-07T16:24:17Z
2020-03-14T15:50:59Z
2020-03-14T15:50:17Z
MEMBER
null
The incorrect tests here turned up when trying to replace Block.get_values calls with simpler alternatives.
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577,369,512
MDExOlB1bGxSZXF1ZXN0Mzg1MTcxMDg0
32,520
BUG: Multiindexed series .at fix
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23
2020-03-07T17:00:57Z
2020-07-11T16:02:07Z
2020-05-25T22:07:51Z
MEMBER
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- [x] closes #26989 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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MDExOlB1bGxSZXF1ZXN0Mzg1MTczMTEw
32,521
CLN: rename get_block_values, simplify
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0
2020-03-07T17:23:11Z
2020-03-11T02:27:23Z
2020-03-11T02:22:42Z
MEMBER
null
cc @WillAyd name more explicit, implementation more transparent.
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577,378,948
MDExOlB1bGxSZXF1ZXN0Mzg1MTc3NzY2
32,522
CLN: remove SingleBlockManager.get_values
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6
2020-03-07T18:14:02Z
2020-03-11T14:42:41Z
2020-03-11T02:20:33Z
MEMBER
null
It is only used in one place, and its behavior doesn't match `self.blocks[0].get_values()`, which is counter-intuitive.
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32,523
CLN: simplify get_values usage in groupby
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2
2020-03-07T18:17:49Z
2020-03-11T03:10:49Z
2020-03-11T02:52:01Z
MEMBER
null
This will avoid an object-casting for e.g. IntervalArray-backed ExtensionBlock.
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577,380,703
MDExOlB1bGxSZXF1ZXN0Mzg1MTc4OTgx
32,524
CLN: avoid Block.get_values in io.sql
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0
2020-03-07T18:27:24Z
2020-03-11T03:07:37Z
2020-03-11T02:52:55Z
MEMBER
null
This particular usage is especially non-transparent, since it is effectively `blk.get_values().astype(object)` which is apparently _not_ equivalent to `blk.get_values(object)`
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577,385,132
MDExOlB1bGxSZXF1ZXN0Mzg1MTgyMDYy
32,525
TST: remove unused kwargs in assert_sp_array_equal
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2020-03-07T19:02:03Z
2020-03-10T15:01:32Z
2020-03-10T11:43:37Z
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577,386,917
MDU6SXNzdWU1NzczODY5MTc=
32,526
API: Timestamp positional arguments not aligned with datetime.datetime
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2020-03-07T19:16:30Z
2020-09-21T22:15:58Z
null
MEMBER
null
Our `Timestamp` constructor is not positionally aligned with `datetime.datetime` since we support a `nanosecond` argument which comes in between `microsecond` and `tzinfo`. This is the main cause for https://github.com/pandas-dev/pandas/issues/32174 as dispatching to `datetime.datetime` methods sometimes reconstructs `Timestamp` with positional arguments. `nanosecond` should be moved to the last positional argument in the `Timestamp` constructor.
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577,391,361
MDExOlB1bGxSZXF1ZXN0Mzg1MTg2NDY0
32,527
TST: make tests stricter
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1
2020-03-07T19:52:24Z
2020-03-14T16:09:26Z
2020-03-14T03:41:07Z
MEMBER
null
I expect to see some platform-specific failures, will be nice to document those where possible.
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577,395,322
MDU6SXNzdWU1NzczOTUzMjI=
32,528
DataFrame.describe() output is not deterministic
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2020-03-07T20:23:45Z
2021-07-30T03:03:19Z
null
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xref #31472 Running this: ```python pd.DataFrame({ 'categorical': pd.Categorical(['d', 'e', 'f']), 'numeric': [1, 2, 3], 'object': ['a', 'b', 'c'] }) df.describe(include="all") ``` Will sometimes have the output of: ``` categorical numeric object count 3 3.0 3 unique 3 NaN 3 top f NaN a freq 1 NaN 1 mean NaN 2.0 NaN std NaN 1.0 NaN min NaN 1.0 NaN 25% NaN 1.5 NaN 50% NaN 2.0 NaN 75% NaN 2.5 NaN max NaN 3.0 NaN ``` And sometimes the output of: ``` categorical numeric object count 3 3.0 3 unique 3 NaN 3 top f NaN c freq 1 NaN 1 mean NaN 2.0 NaN std NaN 1.0 NaN min NaN 1.0 NaN 25% NaN 1.5 NaN 50% NaN 2.0 NaN 75% NaN 2.5 NaN max NaN 3.0 NaN ``` (Changes at the row of ```top```) This is making the doctests fail. We should remove the `SKIP` in the tests in the `describe` docstring when we identify the problem: https://github.com/pandas-dev/pandas/blob/master/pandas/core/generic.py#L9649
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DOC: Remove absolute urls from the docs
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6
2020-03-07T20:58:40Z
2020-03-12T07:15:30Z
2020-03-12T07:15:30Z
MEMBER
null
Looks like we've got some absolute urls (including the domain) in the docs, like https://pandas.pydata.org/pandas-docs/stable/user_guide/timeseries.html#offset-aliases (see here: https://github.com/pandas-dev/pandas/blob/master/pandas/core/indexes/datetimes.py#L178 ). Sphinx (the tool we use to build the docs) provides a way to create those automatically, with the `:ref:` directive. See for example how to automatically generate a link [here](https://github.com/pandas-dev/pandas/blame/master/doc/source/user_guide/computation.rst#L113): ``` :ref:`caveats <computation.covariance.caveats>` ``` Which will point to the label defined [here](https://github.com/pandas-dev/pandas/blame/master/doc/source/user_guide/computation.rst#L51): ``` .. _computation.covariance.caveats: ``` To avoid having new cases in the future after fixing the existing ones, we should add a check in `ci/code_checks.sh` to validate that the pattern `pandas.pydata.org` doesn't exist in the repository (see other examples of patterns we don't want to find in `ci/code_checks.sh` that use the `invgrep` function). If there is a better patter than `pandas.pydata.org` feel free to use it.
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32,530
CI: Update web and docs to OVH with the right structure
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2
2020-03-07T21:53:36Z
2020-03-20T16:36:14Z
2020-03-11T12:58:03Z
MEMBER
null
- [X] closes #32303 I'm uploading all the docs from the NumFOCUS server to the OVH (manually). And I'm changing the CI in this PR to upload the website and the dev docs to the server automatically. I'll have a look and see if we can upload a new version of the docs automatically to OVH when a new GitHub release is generated. So, we never need to upload the website manually. After merging this PR, and when we're confident this is working well, we'll have to redirect pandas.pydata.org to the OVH server. The dev docs will be available at pandas.pydata.org/pandas-docs/dev/ (and we can stop using pandas.io and dev.pandas.io).
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577,408,070
MDExOlB1bGxSZXF1ZXN0Mzg1MTk4NjA3
32,531
DOC: Update pandas.core.groupby.GroupBy.pipe docstring
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2020-03-07T22:09:02Z
2020-03-31T17:41:32Z
2020-03-31T17:41:31Z
NONE
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- [x] closes https://github.com/pandanistas/pandanistas_sprint_ui2020/issues/2 - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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577,416,734
MDExOlB1bGxSZXF1ZXN0Mzg1MjA1MDA0
32,532
TYP: Add type hint for DataFrame.T and certain array types
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1
2020-03-07T23:31:02Z
2020-03-11T03:19:15Z
2020-03-11T03:19:11Z
CONTRIBUTOR
null
While updating a large pandas codebase with type coverage to 1.0, I noticed that `DataFrame.transpose()` is annotated to return `DataFrame` while `DataFrame.T` has no such hint. This PR also adds hints in a few places other places where they're trivial. The definition of `pandas.core.base.IndexOpsMixIn.transpose` (and associated `.T`) currently do not have any type hints and fixing this seems more complicated, meaning `Index.T` and `Series.T` are not fixed by this PR. Happy to amend to cover that case if anyone has suggestions, but I believe `DataFrame.T` to be the vast majority of usage. - [ ] closes #xxxx - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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577,417,651
MDExOlB1bGxSZXF1ZXN0Mzg1MjA1Njgx
32,533
CLN: remove unnecessary to_dense call
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2
2020-03-07T23:40:04Z
2020-03-10T14:54:35Z
2020-03-10T13:31:26Z
MEMBER
null
This call is not reached in the tests, and if it were the following line would make it superfluous anyway. I'm pretty sure the comment there is wrong too.
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MDExOlB1bGxSZXF1ZXN0Mzg1MjA2NTE4
32,534
CLN: remove unused in pd._testing
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MDExOlB1bGxSZXF1ZXN0Mzg1MjE2NDA3
32,535
BUG: retain tz in to_records
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2020-03-08T02:13:42Z
2020-03-14T21:29:43Z
2020-03-14T21:29:22Z
MEMBER
null
plus the initial motivation: get rid of two of our `_internal_get_values` calls (of which i count 16 left in master)
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577,435,716
MDExOlB1bGxSZXF1ZXN0Mzg1MjE5MTYy
32,536
TST: separate out pd.crosstab tests from test_pivot
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2020-03-08T02:57:28Z
2020-03-09T20:18:35Z
2020-03-09T20:17:16Z
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577,436,268
MDExOlB1bGxSZXF1ZXN0Mzg1MjE5NTU4
32,537
CLN: avoid values_from_object in reshape.merge
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2020-03-08T03:03:41Z
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577,436,820
MDExOlB1bGxSZXF1ZXN0Mzg1MjE5OTY1
32,538
ENH: IntegerArray.astype(dt64)
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2020-03-08T03:09:38Z
2020-04-05T17:46:02Z
2020-03-14T03:37:22Z
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- [x] closes #32435 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry Let's us de-kludge to_datetime code, getting rid of another _ndarray_values usage.
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577,449,236
MDExOlB1bGxSZXF1ZXN0Mzg1MjI5MTYy
32,539
DOC: Remove absolute urls from the docs
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10
2020-03-08T05:37:10Z
2020-03-12T08:03:38Z
2020-03-12T07:15:30Z
CONTRIBUTOR
null
- [x] closes #32529 - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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577,498,656
MDU6SXNzdWU1Nzc0OTg2NTY=
32,540
pdf documentation is not bookmarked
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11
2020-03-08T13:11:24Z
2020-03-10T13:39:51Z
2020-03-10T13:39:40Z
CONTRIBUTOR
null
The last PDF documentation 1.0.1. (Feb 05, 2020) has no table of contents, no bookmarks. I made Contents in the form of bookmarks, meanwhile up to level 2. The edited (bookmarked) pdf file is here: [pandas.pdf](https://github.com/pandas-dev/pandas/files/4303229/pandas.pdf).
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577,503,065
MDExOlB1bGxSZXF1ZXN0Mzg1MjY4NDE2
32,541
Fix failure to convert string "uint64" to NaN
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4
2020-03-08T13:44:42Z
2020-03-11T15:48:23Z
2020-03-09T03:29:30Z
CONTRIBUTOR
null
Including regression test - [x] closes #32394 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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577,505,468
MDExOlB1bGxSZXF1ZXN0Mzg1MjcwMTk2
32,542
ENH: Add `replace` method to `Index`
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2020-03-08T14:03:02Z
2021-04-11T00:29:52Z
2021-04-11T00:29:52Z
CONTRIBUTOR
null
- [X] closes #19495 - [X] tests added / passed - [X] passes `black pandas` - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry - [x] docstring for the new Index.replace() method - [X] won't do: type hints - [ ] merge with `ENH:` commit message Added a replace method to Index classes, as well as tests.
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obj.fillna(fill_value) doesn't shallow copy if obj is an empty Series
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1
2020-03-08T17:14:11Z
2020-03-16T22:34:14Z
2020-03-16T22:34:14Z
CONTRIBUTOR
null
While working on #32483 I bumped into the following issue: #### Code Sample, a copy-pastable example if possible ```python obj = pd.Series() result = obj.fillna(0) assert obj is not result # raises AssertionError ``` #### Problem description See `test_fillna` in the mentioned PR (or master when it is merged): With any value of `obj`, even if it is an empty `Index` the shallow copy is executed. This can potentially yield bugs related to unintended mutations of obj further down the road. #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : 343dd6751347b8a7ff67970c762d4b50e8038dfd python : 3.7.6.final.0 python-bits : 64 OS : Darwin OS-release : 19.3.0 Version : Darwin Kernel Version 19.3.0: Thu Jan 9 20:58:23 PST 2020; root:xnu-6153.81.5~1/RELEASE_X86_64 machine : x86_64 processor : i386 byteorder : little LC_ALL : de_DE.utf-8 LANG : de_DE.utf-8export LOCALE : de_DE.UTF-8 pandas : 1.1.0.dev0+698.g343dd6751.dirty numpy : 1.17.5 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.1 setuptools : 45.1.0.post20200119 Cython : 0.29.14 pytest : 5.3.5 hypothesis : 5.3.0 sphinx : 2.3.1 blosc : None feather : None xlsxwriter : 1.2.7 lxml.etree : 4.4.2 html5lib : 1.0.1 pymysql : None psycopg2 : None jinja2 : 2.10.3 IPython : 7.11.1 pandas_datareader: None bs4 : 4.8.2 bottleneck : 1.3.1 fastparquet : 0.3.2 gcsfs : None matplotlib : 3.1.2 numexpr : 2.7.1 odfpy : None openpyxl : 3.0.1 pandas_gbq : None pyarrow : 0.15.1 pytables : None pyxlsb : None s3fs : 0.4.0 scipy : 1.4.1 sqlalchemy : 1.3.13 tables : 3.6.1 tabulate : 0.8.6 xarray : 0.14.1 xlrd : 1.2.0 xlwt : 1.3.0 numba : 0.47.0 </details>
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32,544
BUG: pd.ExcelFile closes stream on destruction
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3
2020-03-08T19:14:23Z
2020-03-12T21:35:56Z
2020-03-12T12:18:21Z
CONTRIBUTOR
null
- [x] closes #31467 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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577,553,700
MDExOlB1bGxSZXF1ZXN0Mzg1MzA0OTQ5
32,545
CLN: to_dense->np.asarray
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0
2020-03-08T19:41:28Z
2020-03-09T16:38:51Z
2020-03-09T13:47:45Z
MEMBER
null
This is the only non-test use of Categorical.to_dense, which is slightly different from _internal_get_values (for SparseArray the two methods are identical), and so liable to cause confusion.
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MDExOlB1bGxSZXF1ZXN0Mzg1MzA1ODIx
32,546
BUG: Dataframe.groupby aggregations with categorical columns lead to incorrect results.
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6
2020-03-08T19:51:00Z
2020-06-14T16:31:04Z
2020-06-14T15:02:05Z
MEMBER
null
- [x] closes #32494 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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577,567,934
MDExOlB1bGxSZXF1ZXN0Mzg1MzE1MzA4
32,547
CLN: remove unnecessary values_from_objects in groupby.ops
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2020-03-08T21:19:39Z
2020-03-11T02:49:54Z
2020-03-11T02:32:41Z
MEMBER
null
2 values_from_object calls left to go...
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32,548
BUG: Add extra check for failing UTF-8 conversion
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2020-03-08T21:35:41Z
2020-03-12T21:36:19Z
2020-03-12T00:54:07Z
CONTRIBUTOR
null
- [x] closes #23809 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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32,549
DOC: Added docstring for Series.name and corrected docstring guide
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2
2020-03-08T21:54:37Z
2020-03-17T00:07:43Z
2020-03-17T00:07:36Z
CONTRIBUTOR
null
The main contribution is to add a docstring with examples for the "name" property of the Series object. Also corrected some typos and grammatical points in the "pandas docstring guide". The type hint gives the type as "Label" and I could not find any other reference to a custom type defined in pandas._typing which was explicitly mentioned in the docs (instead they specify "str" or "int" or somesuch), so I chose "Label (int, str or other hashable object)". Further I chose "whenever displaying the Series in the interpreter" as clearer alternative to "when invoking the __repr__ method" or a similar precise statement.
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Fix capitalization among headings in documentation files
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null
33
2020-03-09T02:53:20Z
2021-05-20T20:43:14Z
null
CONTRIBUTOR
null
In #26933, we made the capitalization of titles consistent. For example, a title used to be capitalized like, "This is the Section Title", and many of the titles in the _pandas_ documentation was changed to a correct format, like "This is the section title". In #31114, we made a script called `scripts/validate_rst_title_capitalization.py` that extracts all titles in the documentation, making sure that only the first letter of the sentence is uppercase, or words defined in a short list, like Series, DataFrame, etc. The script also outputs how to fix the title as well. We validated capitalization is correct by integrating this script into CI (continuous integration). The idea is that we should run this script through `ci/code_checks.sh`, and when title capitalization errors show up on CI, the user should fix those errors on the specified files. To verify the code is working on your side, the command below instructs the program to validate the `doc/source/development/contributing.rst` file. There should be no output from this command as this file as no capitalization errors: `./scripts/validate_rst_title_capitalization.py doc/source/development/contributing.rst` This command below instructs the program to validate both `doc/source/index.rst` and `doc/source/development/policies.rst` files. ``` ./scripts/validate_rst_title_capitalization.py doc/source/index.rst doc/source/development/policies.rst ``` This command produces the output below: ``` doc/source/development/policies.rst:9:Heading capitalization formatted incorrectly. Please correctly capitalize "Version Policy" to "Version policy" doc/source/development/policies.rst:51:Heading capitalization formatted incorrectly. Please correctly capitalize "Python Support" to "Python support" ``` The goal of this issue is to correct the title capitalization of all files in the _pandas_ documentation. In order to see all titles that need to be validated in the documentation folder, one should run the following command below on the command line. `./scripts/validate_rst_title_capitalization.py doc/source` This program validates all RST files in the doc/source folder. Once all titles are all correctly validated, we would like to add the above command into the `ci/code_checks.sh` file. Here's a checklist of all the files that had at least one incorrectly capitalized heading: ``` - [ ] doc/source/user_guide/timedeltas.rst - [ ] doc/source/whatsnew/v0.7.0.rst - [ ] doc/source/whatsnew/v0.23.4.rst - [ ] doc/source/whatsnew/v0.6.0.rst - [ ] doc/source/whatsnew/v1.0.2.rst - [ ] doc/source/whatsnew/v0.18.0.rst - [ ] doc/source/whatsnew/v0.16.2.rst - [ ] doc/source/whatsnew/v0.7.1.rst - [ ] doc/source/whatsnew/v0.8.0.rst - [ ] doc/source/user_guide/integer_na.rst - [ ] doc/source/reference/io.rst - [ ] doc/source/user_guide/computation.rst - [ ] doc/source/whatsnew/v0.16.0.rst - [ ] doc/source/whatsnew/v0.23.2.rst - [ ] doc/source/whatsnew/v0.12.0.rst - [ ] doc/source/getting_started/10min.rst - [ ] doc/source/user_guide/advanced.rst - [ ] doc/source/reference/arrays.rst - [ ] doc/source/development/maintaining.rst - [ ] doc/source/user_guide/groupby.rst - [ ] doc/source/user_guide/cookbook.rst - [ ] doc/source/development/developer.rst - [ ] doc/source/development/meeting.rst - [ ] doc/source/getting_started/intro_tutorials/03_subset_data.rst - [ ] doc/source/whatsnew/v0.4.x.rst - [ ] doc/source/whatsnew/v0.16.1.rst - [ ] doc/source/whatsnew/v1.0.0.rst - [ ] doc/source/whatsnew/v0.23.1.rst - [ ] doc/source/getting_started/tutorials.rst - [ ] doc/source/reference/series.rst - [ ] doc/source/getting_started/intro_tutorials/02_read_write.rst - [ ] doc/source/whatsnew/v0.6.1.rst - [ ] doc/source/whatsnew/v0.13.1.rst - [ ] doc/source/whatsnew/v0.21.0.rst - [ ] doc/source/reference/frame.rst - [ ] doc/source/whatsnew/v0.20.0.rst - [ ] doc/source/getting_started/intro_tutorials/09_timeseries.rst - [ ] doc/source/whatsnew/index.rst - [ ] doc/source/user_guide/merging.rst - [ ] doc/source/whatsnew/v0.18.1.rst - [ ] doc/source/user_guide/enhancingperf.rst - [ ] doc/source/development/contributing_docstring.rst - [ ] doc/source/whatsnew/v0.9.0.rst - [ ] doc/source/whatsnew/v0.25.2.rst - [ ] doc/source/development/extending.rst - [ ] doc/source/reference/window.rst - [ ] doc/source/whatsnew/v0.7.3.rst - [ ] doc/source/user_guide/options.rst - [ ] doc/source/ecosystem.rst - [ ] doc/source/getting_started/intro_tutorials/01_table_oriented.rst - [ ] doc/source/user_guide/categorical.rst - [ ] doc/source/whatsnew/v0.14.1.rst - [ ] doc/source/whatsnew/v0.19.0.rst - [ ] doc/source/whatsnew/v0.20.2.rst - [ ] doc/source/whatsnew/v0.24.0.rst - [ ] doc/source/development/roadmap.rst - [ ] doc/source/whatsnew/v0.17.0.rst - [ ] doc/source/user_guide/boolean.rst - [ ] doc/source/getting_started/comparison/comparison_with_r.rst - [ ] doc/source/whatsnew/v0.17.1.rst - [ ] doc/source/whatsnew/v0.22.0.rst - [ ] doc/source/reference/indexing.rst - [ ] doc/source/user_guide/missing_data.rst - [ ] doc/source/getting_started/install.rst - [ ] doc/source/user_guide/index.rst - [ ] doc/source/user_guide/visualization.rst - [ ] doc/source/getting_started/comparison/comparison_with_stata.rst - [ ] doc/source/whatsnew/v0.19.1.rst - [ ] doc/source/whatsnew/v0.15.1.rst - [ ] doc/source/whatsnew/v0.10.0.rst - [ ] doc/source/whatsnew/v0.19.2.rst - [ ] doc/source/whatsnew/v0.25.3.rst - [ ] doc/source/user_guide/gotchas.rst - [ ] doc/source/whatsnew/v0.14.0.rst - [ ] doc/source/user_guide/reshaping.rst - [ ] doc/source/reference/groupby.rst - [ ] doc/source/whatsnew/v0.23.3.rst - [ ] doc/source/user_guide/timeseries.rst - [ ] doc/source/whatsnew/v0.9.1.rst - [ ] doc/source/getting_started/comparison/comparison_with_sql.rst - [ ] doc/source/whatsnew/v0.24.1.rst - [ ] doc/source/reference/index.rst - [ ] doc/source/development/policies.rst - [ ] doc/source/whatsnew/v0.21.1.rst - [ ] doc/source/whatsnew/v0.20.3.rst - [ ] doc/source/development/code_style.rst - [ ] doc/source/user_guide/sparse.rst - [ ] doc/source/whatsnew/v0.24.2.rst - [ ] doc/source/whatsnew/v0.15.2.rst - [ ] doc/source/whatsnew/v1.1.0.rst - [ ] doc/source/reference/offset_frequency.rst - [ ] doc/source/whatsnew/v1.0.1.rst - [ ] doc/source/getting_started/basics.rst - [ ] doc/source/whatsnew/v0.5.0.rst - [ ] doc/source/user_guide/text.rst - [ ] doc/source/user_guide/indexing.rst - [ ] doc/source/whatsnew/v0.11.0.rst - [ ] doc/source/whatsnew/v0.8.1.rst - [ ] doc/source/getting_started/comparison/comparison_with_sas.rst - [ ] doc/source/whatsnew/v0.23.0.rst - [ ] doc/source/user_guide/io.rst - [ ] doc/source/whatsnew/v0.25.1.rst - [ ] doc/source/whatsnew/v0.13.0.rst - [ ] doc/source/whatsnew/v0.25.0.rst - [ ] doc/source/whatsnew/v0.15.0.rst - [ ] doc/source/whatsnew/v0.10.1.rst ```
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DOC: Fix EX01 in pandas.DataFrame.idxmax
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2
2020-03-09T05:53:51Z
2020-03-11T01:35:56Z
2020-03-11T01:35:50Z
CONTRIBUTOR
null
- [ ] closes #xxxx - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry Related to #27977. ``` ################################################################################ ################################## Validation ################################## ################################################################################
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MDExOlB1bGxSZXF1ZXN0Mzg1NjYzOTc2
32,552
Backport PR #32242 on branch 1.0.x (BUG: Fixed bug, where pandas._libs.lib.maybe_convert_objects function improperly handled arrays with bools and NaNs)
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6
2020-03-09T15:42:45Z
2020-03-10T16:22:32Z
2020-03-10T16:22:32Z
NONE
null
Backport PR #32242: BUG: Fixed bug, where pandas._libs.lib.maybe_convert_objects function improperly handled arrays with bools and NaNs
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MDU6SXNzdWU1NzgwNDc3MDg=
32,553
IntervalIndex raises TypeError on PrettyPrint
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4
2020-03-09T16:51:52Z
2020-12-03T14:23:34Z
2020-12-03T14:23:34Z
NONE
null
#### Code Sample, a copy-pastable example if possible Consider the following series ```python left = Float64Index([329.973, 345.137, 360.191, 376.313, 393.235, 411.969, 434.968, 464.453], dtype='float64') right = pd.Float64Index([345.137, 360.191, 376.313, 393.235, 411.969, 434.968, 464.453, 507.679], dtype='float64') idx = pd.IntervalIndex([pd.Interval(l, r) for l, r in zip(left, right)]) markers = pd.Series(['^', 'p', 'd', 'P', 'X', 'o', 's', 'v'], index=idx) ``` #### Problem description the `IntervalIndex` raises a `TypeError` when printing ```python >>> markers --------------------------------------------------------------------------- TypeError Traceback (most recent call last) ~/.conda/envs/test-env/lib/python3.7/site-packages/IPython/core/formatters.py in __call__(self, obj) 700 type_pprinters=self.type_printers, 701 deferred_pprinters=self.deferred_printers) --> 702 printer.pretty(obj) 703 printer.flush() 704 return stream.getvalue() ~/.conda/envs/test-env/lib/python3.7/site-packages/IPython/lib/pretty.py in pretty(self, obj) 403 if cls is not object \ 404 and callable(cls.__dict__.get('__repr__')): --> 405 return _repr_pprint(obj, self, cycle) 406 407 return _default_pprint(obj, self, cycle) ~/.conda/envs/test-env/lib/python3.7/site-packages/IPython/lib/pretty.py in _repr_pprint(obj, p, cycle) 693 """A pprint that just redirects to the normal repr function.""" 694 # Find newlines and replace them with p.break_() --> 695 output = repr(obj) 696 lines = output.splitlines() 697 with p.group(): ~/.conda/envs/test-env/lib/python3.7/site-packages/pandas/core/series.py in __repr__(self) 1369 min_rows=min_rows, 1370 max_rows=max_rows, -> 1371 length=show_dimensions, 1372 ) 1373 result = buf.getvalue() ~/.conda/envs/test-env/lib/python3.7/site-packages/pandas/core/series.py in to_string(self, buf, na_rep, float_format, header, index, length, dtype, name, max_rows, min_rows) 1435 max_rows=max_rows, 1436 ) -> 1437 result = formatter.to_string() 1438 1439 # catch contract violations ~/.conda/envs/test-env/lib/python3.7/site-packages/pandas/io/formats/format.py in to_string(self) 358 ) 359 --> 360 fmt_index, have_header = self._get_formatted_index() 361 fmt_values = self._get_formatted_values() 362 ~/.conda/envs/test-env/lib/python3.7/site-packages/pandas/io/formats/format.py in _get_formatted_index(self) 338 else: 339 have_header = index.name is not None --> 340 fmt_index = index.format(name=True) 341 return fmt_index, have_header 342 ~/.conda/envs/test-env/lib/python3.7/site-packages/pandas/core/indexes/base.py in format(self, name, formatter, **kwargs) 964 return header + list(self.map(formatter)) 965 --> 966 return self._format_with_header(header, **kwargs) 967 968 def _format_with_header(self, header, na_rep="NaN", **kwargs): ~/.conda/envs/test-env/lib/python3.7/site-packages/pandas/core/indexes/interval.py in _format_with_header(self, header, **kwargs) 1000 1001 def _format_with_header(self, header, **kwargs): -> 1002 return header + list(self._format_native_types(**kwargs)) 1003 1004 def _format_native_types(self, na_rep="NaN", quoting=None, **kwargs): ~/.conda/envs/test-env/lib/python3.7/site-packages/pandas/core/indexes/interval.py in _format_native_types(self, na_rep, quoting, **kwargs) 1004 def _format_native_types(self, na_rep="NaN", quoting=None, **kwargs): 1005 # GH 28210: use base method but with different default na_rep -> 1006 return super()._format_native_types(na_rep=na_rep, quoting=quoting, **kwargs) 1007 1008 def _format_data(self, name=None): ~/.conda/envs/test-env/lib/python3.7/site-packages/pandas/core/indexes/base.py in _format_native_types(self, na_rep, quoting, **kwargs) 1026 Actually format specific types of the index. 1027 """ -> 1028 mask = isna(self) 1029 if not self.is_object() and not quoting: 1030 values = np.asarray(self).astype(str) ~/.conda/envs/test-env/lib/python3.7/site-packages/pandas/core/dtypes/missing.py in isna(obj) 124 Name: 1, dtype: bool 125 """ --> 126 return _isna(obj) 127 128 ~/.conda/envs/test-env/lib/python3.7/site-packages/pandas/core/dtypes/missing.py in _isna_old(obj) 181 return False 182 elif isinstance(obj, (ABCSeries, np.ndarray, ABCIndexClass, ABCExtensionArray)): --> 183 return _isna_ndarraylike_old(obj) 184 elif isinstance(obj, ABCGeneric): 185 return obj._constructor(obj._data.isna(func=_isna_old)) ~/.conda/envs/test-env/lib/python3.7/site-packages/pandas/core/dtypes/missing.py in _isna_ndarraylike_old(obj) 288 result = values.view("i8") == iNaT 289 else: --> 290 result = ~np.isfinite(values) 291 292 # box TypeError: ufunc 'isfinite' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'' ``` **Note**: We receive a lot of issues on our GitHub tracker, so it is very possible that your issue has been posted before. Please check first before submitting so that we do not have to handle and close duplicates! **Note**: Many problems can be resolved by simply upgrading `pandas` to the latest version. Before submitting, please check if that solution works for you. If possible, you may want to check if `master` addresses this issue, but that is not necessary. For documentation-related issues, you can check the latest versions of the docs on `master` here: https://pandas-docs.github.io/pandas-docs-travis/ If the issue has not been resolved there, go ahead and file it in the issue tracker. #### Expected Output When we change the index to a `categorical`, the visual representation prints ```python >>> markers.index = pd.CategoricalIndex(markers.index) >>> markers (329.973, 345.137] ^ (345.137, 360.191] p (360.191, 376.313] d (376.313, 393.235] P (393.235, 411.969] X (411.969, 434.968] o (434.968, 464.453] s (464.453, 507.679] v dtype: object ``` #### Output of ``pd.show_versions()`` INSTALLED VERSIONS ------------------ commit : None python : 3.7.6.final.0 python-bits : 64 OS : Linux OS-release : 3.10.0-1062.4.3.el7.x86_64 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.0.1 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 45.2.0.post20200210 Cython : None pytest : 5.3.5 hypothesis : 5.5.4 sphinx : 2.4.0 blosc : None feather : None xlsxwriter : None lxml.etree : 4.5.0 html5lib : None pymysql : None psycopg2 : None jinja2 : 2.11.1 IPython : 7.12.0 pandas_datareader: None bs4 : 4.8.2 bottleneck : 1.3.1 fastparquet : None gcsfs : None lxml.etree : 4.5.0 matplotlib : 3.1.3 numexpr : 2.7.1 odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pytest : 5.3.5 pyxlsb : None s3fs : None scipy : 1.4.1 sqlalchemy : 1.3.13 tables : 3.6.1 tabulate : None xarray : None xlrd : None xlwt : None xlsxwriter : None numba : None </details>
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MDExOlB1bGxSZXF1ZXN0Mzg1NzEzMzk3
32,554
CLN: remove Categorical.put
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CLN: avoid _internal_get_values in Categorical.__iter__
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Dataframe.query uses numexpr even when 'compute.use_numexpr' is False
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2021-07-28T01:23:32Z
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#### Code Sample, a copy-pastable example if possible ```python # Your code here import pandas as pd import io content = io.StringIO(''' time,val 212.23, 32 ''') pd.set_option('compute.use_numexpr', False) print("use numexpr? %d" % pd.get_option('compute.use_numexpr')) df = pd.read_csv( content, sep=',', usecols=['time', 'val'], dtype= {'val': 'Int64'}, # parse_dates=date_cols, ) q = "val == 32" # passing `engine="python"` fixes it df_dest = df.query(q, ) ``` throws with pandas 1.0 ``` Traceback (most recent call last): File "test.py", line 21, in <module> df_dest = df.query(q, ) File "/nix/store/0yyjswv58jk0fv1miyklmppvpd0p45sy-python3.7-pandas-1.0.1/lib/python3.7/sit e-packages/pandas/core/frame.py", line 3231, in query res = self.eval(expr, **kwargs) File "/nix/store/0yyjswv58jk0fv1miyklmppvpd0p45sy-python3.7-pandas-1.0.1/lib/python3.7/sit e-packages/pandas/core/frame.py", line 3346, in eval return _eval(expr, inplace=inplace, **kwargs) File "/nix/store/0yyjswv58jk0fv1miyklmppvpd0p45sy-python3.7-pandas-1.0.1/lib/python3.7/sit e-packages/pandas/core/computation/eval.py", line 337, in eval ret = eng_inst.evaluate() File "/nix/store/0yyjswv58jk0fv1miyklmppvpd0p45sy-python3.7-pandas-1.0.1/lib/python3.7/sit e-packages/pandas/core/computation/engines.py", line 73, in evaluate res = self._evaluate() File "/nix/store/0yyjswv58jk0fv1miyklmppvpd0p45sy-python3.7-pandas-1.0.1/lib/python3.7/sit e-packages/pandas/core/computation/engines.py", line 114, in _evaluate return ne.evaluate(s, local_dict=scope) File "/nix/store/k6wr7w16q0aq9mfkf0w15wxlhx76sxqc-python3.7-numexpr-2.7.1/lib/python3.7/si te-packages/numexpr/necompiler.py", line 822, in evaluate zip(names, arguments)] File "/nix/store/k6wr7w16q0aq9mfkf0w15wxlhx76sxqc-python3.7-numexpr-2.7.1/lib/python3.7/si te-packages/numexpr/necompiler.py", line 821, in <listcomp> signature = [(name, getType(arg)) for (name, arg) in File "/nix/store/k6wr7w16q0aq9mfkf0w15wxlhx76sxqc-python3.7-numexpr-2.7.1/lib/python3.7/si te-packages/numexpr/necompiler.py", line 703, in getType raise ValueError("unknown type %s" % a.dtype.name) ValueError: unknown type object ``` #### Problem description Dataframe.query fails when using UInt* dtypes see https://github.com/pandas-dev/pandas/issues/25369#issuecomment-594905994. My first idea to solve this was to disable numexpr but this isn't enough, one has to pass `engine="python"` to forcefully disable numexpr when calling `query`
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CLN: values_from_object in computation.pytables
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0
2020-03-09T18:30:47Z
2020-03-11T02:34:56Z
2020-03-11T02:33:14Z
MEMBER
null
By my count there is just one more `values_from_object` call to go.
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578,117,499
MDExOlB1bGxSZXF1ZXN0Mzg1NzU4MDE2
32,558
BUG: pivot_table losing tz
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14
2020-03-09T18:46:52Z
2020-03-14T23:31:12Z
2020-03-14T23:28:54Z
MEMBER
null
- [ ] closes #xxxx - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry This gets rid of the last values_from_object usage (pending other PRs) `_tile_compat` likely makes more sense as an Index method. I kept it here as a proof of concept because I think we actually need it in the EA interface too. Being able to broadcast a length=1 EA to a length=N EA will be necessary for some of the arithmetic perf going on.
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578,119,456
MDU6SXNzdWU1NzgxMTk0NTY=
32,559
date_range() : allowing argument closed to have value 'open'
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2
2020-03-09T18:50:05Z
2020-03-18T19:50:45Z
2020-03-18T19:50:45Z
NONE
null
#### Code Sample ``` # My current code to get rid of both extremities of the DateTimeIndex returned by date_range() def my_date_range(start: pd.Timestamp, end: pd.Timestamp, freq: str) -> pd.DatetimeIndex: """ Remove automatically first and last timestamps from the generated DateTimeIndex. """ DTI = pd.date_range(start = start, end = end, freq = freq, closed = 'left') # Last timestamp has not been kept with use of 'closed' keyword, 'left' value. # With delete, the 1st timestamp is also removed. return DTI.delete(0) # Now, I can use date_range() the way I want with apply() function :) time_range = df.apply(lambda x: pd.Series(my_date_range(x.name, x.End, x.Freq)), axis=1).stack() ``` #### Problem description Please, could the keyword 'closed' accept a 4th value (for instance 'open') that allows suppressing both extremities of the DateTimeIndex? Thanks for your help and this marvelous library! Loving it! ;)
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578,125,591
MDExOlB1bGxSZXF1ZXN0Mzg1NzY0NDkw
32,560
TST: Add extra test for pandas.to_numeric() for issue #32394
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4
2020-03-09T19:01:15Z
2020-03-15T07:16:17Z
2020-03-15T00:38:58Z
CONTRIBUTOR
null
- [x] closes #32394 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry (covered by PR #32541)
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578,133,428
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32,561
Ensure valid Block mutation in SeriesBinGrouper.
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8
2020-03-09T19:16:11Z
2020-03-11T18:34:49Z
2020-03-11T18:34:48Z
CONTRIBUTOR
null
Closes https://github.com/pandas-dev/pandas/issues/31802 ~This "fixes" #31802 by expanding the number of cases where we swallow an exception in libreduction. Currently, we're creating an invalid Series in SeriesBinGrouper where the `.mgr_locs` doesn't match the values. See https://github.com/pandas-dev/pandas/issues/31802#issuecomment-595954511 for more.~ ~For now, we simply catch more cases that fall back to Python. I've gone with a minimal change which addresses only issues hitting this exact exception. We might want to go broader, but that's not clear.~ cc @jbrockmendel & @WillAyd
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32,562
CI: TravisCI Failing
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1
2020-03-09T19:30:42Z
2020-03-09T20:03:06Z
2020-03-09T20:03:06Z
CONTRIBUTOR
null
Good: https://travis-ci.org/pandas-dev/pandas/jobs/660156644#L7 Bad: https://travis-ci.org/pandas-dev/pandas/jobs/660210493#L1 https://travis-ci.org/pandas-dev/pandas/jobs/660210493#L175-L177 looks strange. ``` $ export PATTERN=""(not slow and not network and not clipboard)"" /home/travis/.travis/functions: eval: line 109: syntax error near unexpected token `(' /home/travis/.travis/functions: eval: line 109: `export PATTERN=""(not slow and not network and not clipboard)"" ' ``` Most likely something changed on the TravisCI end. Opening this to track it.
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578,171,061
MDExOlB1bGxSZXF1ZXN0Mzg1ODAxODIy
32,563
Fix warning in io/excel/test_openpyxl
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1
2020-03-09T20:28:59Z
2020-03-11T15:47:52Z
2020-03-10T11:17:12Z
CONTRIBUTOR
null
as requested in PR #32544
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MDExOlB1bGxSZXF1ZXN0Mzg1ODAyMjIz
32,564
DOC: Add missing question mark icon
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2
2020-03-09T20:29:51Z
2020-03-10T07:18:29Z
2020-03-10T07:18:29Z
CONTRIBUTOR
null
- [x] closes #32469 - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry I added the question mark to the `_static` folder. When rebuilding the documentation pages locally using the latest version of the `pydata-bootstrap-sphinx-theme`, the `div.highlight` seems to be styled correctly (`background: white`), removing the _strange green around the code block_.
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578,174,536
MDExOlB1bGxSZXF1ZXN0Mzg1ODA0ODg0
32,565
TST: Fix bare pytest raises in generic/test_frame.py
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2
2020-03-09T20:34:14Z
2020-03-10T10:37:41Z
2020-03-10T10:37:29Z
CONTRIBUTOR
null
- [x] refers https://github.com/pandas-dev/pandas/issues/30999 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` Adds match arguments to pytest.raises calls in pandas/tests/generic/test_frame.py
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MDExOlB1bGxSZXF1ZXN0Mzg1ODQxMjI1
32,566
BUG: Fix segfault in csv tokenizer
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4
2020-03-09T22:07:07Z
2020-03-16T20:08:32Z
2020-03-16T02:21:30Z
CONTRIBUTOR
null
- [x] closes #28071 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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32,567
TST: add test.indexes.common.Base.create_index and annotate .create_index
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2
2020-03-09T22:26:59Z
2020-03-10T11:09:31Z
2020-03-10T11:09:21Z
CONTRIBUTOR
null
Makes ``test.indexes.common.Base`` and ``create_index`` a bit easier to work with.
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MDExOlB1bGxSZXF1ZXN0Mzg1ODQ5ODI5
32,568
PERF: copy cached attributes on index shallow_copy
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5
2020-03-09T22:33:40Z
2020-03-11T09:02:49Z
2020-03-11T03:06:03Z
CONTRIBUTOR
null
- [x] closes #28584 - [ ] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry The performance of the example in #28584 is: ```python >>> idx = pd.Index(np.arange(100_000)) >>> %timeit idx.get_loc(99_999) 1.17 µs ± 80.6 ns per loop # master and this PR >>> %timeit idx._shallow_copy().get_loc(99_999) 3.57 ms ± 286 ns per loop # master 3.67 µs ± 286 ns per loop # this PR ``` The issue is still on the extension indexes, e.g. ``CategoricalIndex._shallow_copy``. I'd like to take them afterwards.
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578,249,631
MDU6SXNzdWU1NzgyNDk2MzE=
32,569
Arithmetic doesn't broadcast when MultiIndex has the same data, different names
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null
1
2020-03-09T23:37:24Z
2021-07-30T03:06:25Z
null
NONE
null
#### Code Sample ```python import pandas as pd index_st = pd.MultiIndex.from_tuples([(1,1),(1,2),(2,1),(2,2)], names=['second','third']) index_ft1 = pd.MultiIndex.from_tuples([(1,1),(1,2),(2,1),(2,2)], names=['first','third']) index_ft2 = pd.MultiIndex.from_tuples([(1,1),(2,1),(1,2),(2,2)], names=['first','third']) st = pd.DataFrame([1,2,3,4], index=index_st, columns=['val']) ft1 = pd.DataFrame([10,20,30,40], index=index_ft1, columns=['val']) ft2 = pd.DataFrame([10,30,20,40], index=index_ft2, columns=['val']) print(st.add(ft1)) print(st.add(ft2)) ``` #### Problem description The calculation of `ft1` doesn't broadcast as expected. Instead, it treats the differently-named indexed columns as identical and performs a component-wise addition. The calculation of `ft2` is as expected. `ft1` and `ft2` having different index columns is *definitely* not expected. #### Output That I See ``` val second third 1 1 11 2 22 2 1 33 2 44 val third second first 1 1 1 11 2 31 2 1 13 2 33 2 1 1 22 2 42 2 1 24 2 44 ``` #### Expected Output The expected output of the two calculations should be the same, possibly with the rows returned in a different order. ``` val third second first 1 1 1 11 2 31 2 1 13 2 33 2 1 1 22 2 42 2 1 24 2 44 val third second first 1 1 1 11 2 31 2 1 13 2 33 2 1 1 22 2 42 2 1 24 2 44 ``` #### Where the problem lies The problem appears to be in [MultiIndex.equals](https://github.com/pandas-dev/pandas/blob/ae79bb23c7d10bd5b307f542c1a1c78d1600aecb/pandas/core/indexes/multi.py#L3126) This is called by [NDFrame. _indexed_same](https://github.com/pandas-dev/pandas/blob/ae79bb23c7d10bd5b307f542c1a1c78d1600aecb/pandas/core/generic.py#L1233), which is called by [_align_method_FRAME](https://github.com/pandas-dev/pandas/blob/ae79bb23c7d10bd5b307f542c1a1c78d1600aecb/pandas/core/ops/__init__.py#L624) The problem is that MultiIndex.equals doesn't check the names, and so reports indices as equal when they're not. This in turn means the non-broadcasting case is taken, when it should broadcast. #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : ae79bb23c7d10bd5b307f542c1a1c78d1600aecb python : 3.8.0.final.0 python-bits : 64 OS : Linux OS-release : 4.19.76-linuxkit Version : #1 SMP Thu Oct 17 19:31:58 UTC 2019 machine : x86_64 processor : byteorder : little LC_ALL : None LANG : C.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.1.0.dev0+725.gae79bb23c numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 19.3.1 setuptools : 41.6.0 Cython : 0.29.15 pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : None IPython : None pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None matplotlib : None numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pyxlsb : None s3fs : None scipy : None sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None numba : None </details> #### See also (I haven't checked if these are related, but they "sound similar") https://github.com/pandas-dev/pandas/issues/20565 https://github.com/pandas-dev/pandas/issues/5645 https://github.com/pandas-dev/pandas/issues/19606
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32,570
CLN: avoid _internal_get_values in pandas._testing
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1
2020-03-10T02:26:43Z
2020-03-13T17:28:11Z
2020-03-11T02:19:30Z
MEMBER
null
7 more usages left after this
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32,571
TST: stricter tests, avoid check_categorical=False, check_less_precise
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1
2020-03-10T02:30:06Z
2020-03-11T02:30:00Z
2020-03-11T02:27:15Z
MEMBER
null
Won't be too surprised if 32bit builds need some troubleshooting.
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MDU6SXNzdWU1NzgzNjg2NjU=
32,572
BUG: get_loc / get_indexer with NaT and tz-aware DatetimeIndex
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4
2020-03-10T06:39:51Z
2021-07-30T03:11:24Z
null
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python >>> pd.date_range('2020', 'now').get_loc(pd.NaT, method='nearest') 0 # Ok? NaT would be better to propagate. >>> pd.date_range('2020', 'now', tz='US/Central').get_loc(pd.NaT, method='nearest') ----------------------------------------------------------------------------------- Traceback (most recent call last): File "<string>", line 1, in <module> File "pandas/core/indexes/datetimes.py", line 582, in get_loc return Index.get_loc(self, key, method, tolerance) File "pandas/core/indexes/base.py", line 2869, in get_loc indexer = self.get_indexer([key], method=method, tolerance=tolerance) File "pandas/core/indexes/base.py", line 2951, in get_indexer target, method=method, limit=limit, tolerance=tolerance File "pandas/core/indexes/base.py", line 2962, in get_indexer indexer = self._get_nearest_indexer(target, limit, tolerance) File "pandas/core/indexes/base.py", line 3046, in _get_nearest_indexer left_distances = np.abs(self[left_indexer] - target) File "pandas/core/indexes/base.py", line 2361, in __sub__ return Index(np.array(self) - other) File "pandas/core/indexes/base.py", line 2367, in __rsub__ return Index(other - Series(self)) File "pandas/core/series.py", line 646, in __array_ufunc__ self, ufunc, method, *inputs, **kwargs File "pandas/_libs/ops_dispatch.pyx", line 91, in pandas._libs.ops_dispatch.maybe_dispatch_ufunc_to_dunder_op File "pandas/core/ops/common.py", line 63, in new_method return method(self, other) File "pandas/core/ops/__init__.py", line 500, in wrapper result = arithmetic_op(lvalues, rvalues, op, str_rep) File "pandas/core/ops/array_ops.py", line 218, in arithmetic_op res_values = dispatch_to_extension_op(op, lvalues, rvalues) File "pandas/core/ops/dispatch.py", line 125, in dispatch_to_extension_op res_values = op(left, right) File "pandas/core/ops/roperator.py", line 13, in rsub return right - left File "pandas/core/arrays/datetimelike.py", line 1428, in __rsub__ f"cannot subtract {type(self).__name__} from {type(other).__name__}" TypeError: cannot subtract DatetimeArray from ndarray ``` #### Problem description `pd.NaT` is NaT regardless of timezone. #### Expected Output ```py >>> pd.date_range('2020', 'now').get_loc(pd.NaT, method='nearest') NaT >>> pd.date_range('2020', 'now', tz='US/Central').get_loc(pd.NaT, method='nearest') NaT ``` #### Output of ``pd.show_versions()`` <details> pandas 1.1.0.dev0+725.gae79bb23c </details>
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MDExOlB1bGxSZXF1ZXN0Mzg1OTczNTYx
32,573
Backport PR #32564 on branch 1.0.x (DOC: Add missing question mark icon)
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0
2020-03-10T07:19:02Z
2020-03-10T07:54:42Z
2020-03-10T07:54:41Z
NONE
null
Backport PR #32564: DOC: Add missing question mark icon
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32,574
Backport PR #31875 on branch 1.0.x (DOC: add redirects from Rolling to rolling.Rolling)
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0
2020-03-10T08:35:58Z
2020-03-10T10:15:57Z
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NONE
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Backport PR #31875: DOC: add redirects from Rolling to rolling.Rolling
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TST: Add tests for duplicated and drop_duplicates
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3
2020-03-10T09:35:01Z
2020-04-16T17:15:04Z
2020-04-06T23:23:00Z
CONTRIBUTOR
null
- [x] refers to #15752 - [x] tests added / passed - [x] tests duplicated and drop_duplicates for period, categorical, datetimes, timedelta
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32,576
Index.insert(-1, value) should add value in the last position
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2020-03-10T10:07:25Z
2020-03-10T12:22:42Z
2020-03-10T12:22:42Z
NONE
null
#### Problem description and Expected Output ``Index.insert(-1, value)`` should add value in the last position instead of one before the last position, shouldn't it? #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.7.6.final.0 python-bits : 64 OS : Windows OS-release : 10 machine : AMD64 processor : Intel64 Family 6 Model 142 Stepping 10, GenuineIntel byteorder : little LC_ALL : None LANG : en LOCALE : None.None pandas : 1.0.1 numpy : 1.18.1 </details>
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REG: Restore read_csv function for some file-likes
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1
2020-03-10T10:22:21Z
2020-03-11T02:22:06Z
2020-03-11T02:22:02Z
MEMBER
null
Restore `read_csv` function for some file-likes Restores behavior down to the fact that the Python engine cannot handle NamedTemporaryFile. Closes https://github.com/pandas-dev/pandas/issues/31819 Credit to @sasanquaneuf for [originating idea](https://github.com/pandas-dev/pandas/issues/31819#issuecomment-584529415).
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Backport PR #31684 on branch 1.0.x (BUG: string methods with NA)
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0
2020-03-10T14:09:22Z
2020-03-10T16:21:21Z
2020-03-10T16:21:21Z
NONE
null
Backport PR #31684: BUG: string methods with NA
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32,579
[QST] Clarify when `agg()` will return groups as index
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0
2020-03-10T15:52:14Z
2020-05-27T12:43:34Z
2020-05-27T12:43:34Z
CONTRIBUTOR
null
``` In [44]: a = pd.DataFrame({'a': [1, 1, 2], 'b': [1, 2, 3]}) In [45]: a.groupby('a').agg('sum') # 'a' is returned as index Out[45]: b a 1 3 2 3 In [46]: a.groupby('a').agg('nunique') # 'a' is returned both as index and column Out[46]: a b a 1 1 2 2 1 1 ``` The groupby [documentation](https://pandas.pydata.org/pandas-docs/stable/user_guide/groupby.html#aggregation) notes: > Aggregation functions will not return the groups that you are aggregating over if they are named columns, when as_index=True, the default. The grouped columns will be the indices of the returned object. However, in the snippet above, it looks like the `nunique` aggregation behaves differently in this respect from the `sum` aggregation. Is it possible to predict when an aggregation will return groups as index columns v/s a "SQL-style output" v/s a combination of the two (as above)?
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32,580
[BUG] Grouped-by column loses name when empty list of aggregations is specified.
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0
2020-03-10T15:57:43Z
2020-06-14T18:04:54Z
2020-06-14T18:04:54Z
CONTRIBUTOR
null
``` In [53]: a = pd.DataFrame({'a': [1, 1, 2], 'b': [1, 2, 3], 'c': [1, 2, 4]}) In [54]: a.groupby('a').agg({'c': ['min']}) # name preserved in index Out[54]: c min a 1 1 2 4 In [55]: a.groupby('a').agg({'b': [], 'c': ['min']}) # name lost in index Out[55]: c min 1 1 2 4 ``` In the above snippet, the name of the grouped by column (`'a'`) is preserved in the former case, and lost in the latter case.
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578,692,046
MDU6SXNzdWU1Nzg2OTIwNDY=
32,581
DataFrame.astype does not handle multiple timezone aware Timestamps
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2020-03-10T16:04:43Z
2021-07-30T03:11:18Z
null
CONTRIBUTOR
null
```python import pandas df = pandas.DataFrame({'a': [pandas.Timestamp('20200309T120000.000000-0400'), pandas.Timestamp('20200309T130000.000000-0400')]}) df.astype({'a': pandas.api.types.DatetimeTZDtype(unit='ns', tz='UTC')}) ``` ``` a 0 2020-03-09 16:00:00+00:00 1 2020-03-09 17:00:00+00:00 ``` ```python df = pandas.DataFrame({'a': [pandas.Timestamp('20200309T120000.000000-0400'), pandas.Timestamp('20200309T130000.000000-0500')]}) df.astype({'a': pandas.api.types.DatetimeTZDtype(unit='ns', tz='UTC')}) ValueError: Tz-aware datetime.datetime cannot be converted to datetime64 unless utc=True ``` Similarly, something like `df['a'].dt.tz_convert(tz='utc')` also returns the same error #### Problem description Calling `pandas.DataFrame.astype` with a column of mixed timezone aware Timestamps fails to convert to `UTC` #### Expected Output I would expect this to return the same result as `df.applymap(lambda x: x.tz_convert(tz='utc'))` ``` 0 2020-03-09 16:00:00+00:00 1 2020-03-09 18:00:00+00:00 ``` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.8.1.final.0 python-bits : 64 OS : Linux OS-release : 5.3.0-28-generic machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.0.1 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 46.0.0.post20200309 Cython : None pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : None IPython : 7.12.0 pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : None matplotlib : None numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pytest : None pyxlsb : None s3fs : None scipy : None sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None xlsxwriter : None numba : None </details>
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578,693,354
MDU6SXNzdWU1Nzg2OTMzNTQ=
32,582
Creating a column with a set replicates the set n times
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0
2020-03-10T16:06:41Z
2020-03-15T00:41:34Z
2020-03-15T00:41:34Z
NONE
null
#### Code Sample If we try to define a dataframe using a dictionary containing a set, we get: ```python pd.DataFrame({'a':{1,2,3}}) a 0 {1, 2, 3} 1 {1, 2, 3} 2 {1, 2, 3} ``` #### Problem description The set is being replicated `n` times, `n` being the length of the actual set. While defining a column with a set directly might not make a lot of sense given that they are by definition unordered collections, the behaviour in any case seems clearly unexpected. #### Expected Output In the case of a list, in order to obtain a single row containing a list, we would have to define a nested list, such as `pd.DataFrame({'a':[[1,2,3]]})`. So similarly, with sets I would expect the same behaviour by defining the row with `pd.DataFrame({'a':[{1,2,3}]})`. In the case of a single set, even if the order is not guaranteed to be preserved, I'd see more reasonable the same output that we would obtain with: ```python pd.DataFrame({'a':[1,2,3]}) a 0 1 1 2 2 3 ``` So: ```python pd.DataFrame({'a':{1,2,3}}) a 0 1 1 2 2 3 ``` Where: ```python pd.__version__ # '1.0.0' ```
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578,695,218
MDExOlB1bGxSZXF1ZXN0Mzg2MjI3MTIy
32,583
CLN: remove unreachable code in pandas/core/groupby/generic.py::DataFrameGroupBy::_transform_general
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5
2020-03-10T16:09:32Z
2020-10-10T14:14:54Z
2020-04-11T13:04:18Z
MEMBER
null
Is this part of the code ``` else: # Handle cases like BinGrouper return self._concat_objects(keys, values, not_indexed_same=not_indexed_same) ``` necessary? The condition before it is ``` elif self.grouper.groupings is not None ``` . However, even in the case of `BinGrouper`, I don't believe `BinGrouper.groupings` can be `None`: ``` >>> from pandas.core.groupby.ops import BinGrouper >>> BinGrouper([], []).groupings [Grouping(None)] ``` and so this code is unreachable. It's not covered by the tests, at least - https://codecov.io/gh/pandas-dev/pandas/src/master/pandas/core/groupby/generic.py#L1354 If it can be removed, I've taken it out and then shifted the code above it back by one tab (because we no longer need the guard)
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32,584
Document `DataError` in the API
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1
2020-03-10T16:09:40Z
2021-07-30T03:13:32Z
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CONTRIBUTOR
null
Currently, some groupby operations can raise a `DataError` that does not seem to be documented: ``` In [7]: a = pd.DataFrame({'a': [1, 2, 3, 4], 'b': ['a', 'b', 'c', 'd']}) In [8]: a.groupby('a').mean() --------------------------------------------------------------------------- DataError Traceback (most recent call last) <ipython-input-8-52f32e3da133> in <module> ----> 1 a.groupby('a').mean() ~/miniconda3/envs/pandas-py37/lib/python3.7/site-packages/pandas/core/groupby/groupby.py in mean(self, *args, **kwargs) 1230 nv.validate_groupby_func("mean", args, kwargs, ["numeric_only"]) 1231 return self._cython_agg_general( -> 1232 "mean", alt=lambda x, axis: Series(x).mean(**kwargs), **kwargs 1233 ) 1234 ~/miniconda3/envs/pandas-py37/lib/python3.7/site-packages/pandas/core/groupby/generic.py in _cython_agg_general(self, how, alt, numeric_only, min_count) 1002 ) -> DataFrame: 1003 agg_blocks, agg_items = self._cython_agg_blocks( -> 1004 how, alt=alt, numeric_only=numeric_only, min_count=min_count 1005 ) 1006 return self._wrap_agged_blocks(agg_blocks, items=agg_items) ~/miniconda3/envs/pandas-py37/lib/python3.7/site-packages/pandas/core/groupby/generic.py in _cython_agg_blocks(self, how, alt, numeric_only, min_count) 1103 1104 if not (agg_blocks or split_frames): -> 1105 raise DataError("No numeric types to aggregate") 1106 1107 if split_items: DataError: No numeric types to aggregate ``` Could this error be documented as part of the API, or alternatively, could a different exception be raised so that users can catch and handle it appropriately?
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March 2020 Dev Meeting
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2020-03-10T16:18:40Z
2020-03-11T19:05:11Z
2020-03-11T19:05:11Z
CONTRIBUTOR
null
The monthly dev meeting is tomorrow at 18:00 UTC. Note that your local time may be different than last month. The US had a DST transition last weekend, while Europe didn't. Our calendar is at https://pandas.pydata.org/docs/development/meeting.html#calendar Video Call: https://meet.google.com/hav-rmax-zjx Minutes: https://docs.google.com/document/u/1/d/1tGbTiYORHiSPgVMXawiweGJlBw5dOkVJLY-licoBmBU/edit?ouid=102771015311436394588&usp=docs_home&ths=true Please add items you'd like to see discussed to the agenda.
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32,586
EA: revisit interface
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2020-03-10T16:28:14Z
2020-11-11T20:38:25Z
null
MEMBER
null
This is as good a time as any to revisit the "experimental" EA interface. My read of the Issues and recollection of threads suggests there are three main groups of topics: Clarification of the Interface ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 1) _values_for_argsort and values_for_factorize - Do we need both? The docs both say they should be order-preserving. - Is it safe to return a view? (Categorical.values_for_argsort makes a copy for no obvious reason) - What else can they be used for internally? e.g. in #32467 _values_for_argsort is used for ExtensionIndex join_non_unique and join_monotonic 2) <s>What characteristics should _ndarray_values have? Is it needed? (#32412)</s> _ndarray_values has been removed 3) What should _from_sequence accept? - Should it only be sequences that are unambiguously this dtype? - In particular, should DTA/TDA/PA _not_ accept i8 values? 4) What should fillna accept? (#22954, #32414) 4.5) Require that `__iter__` return native types? #29738 Ndarray Compat ^^^^^^^^^^^^^^^^^ 5) Headaches have been caused by trivial ndarray methods not being on EA - #31199 size - #32342 "T" (just the most recent; this has come up a lot) - #24583 ravel 6) For arithmetic we're going to need something like either `tile` or `broadcast_to` Methods Needed/Wanted For Index/Series/DataFrame/Block ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 7) Suggested Methods (partial list) - #27264 duplicated - #23437 empty - #28955 apply - #23179 map - #22680 hasnas - #27081 equals - #24144 where - putmask would be helpful for ExtensionIndex I suggest we discuss these in order. Before jumping in, is there anything vital missing from this list? (this is only a small subset of the issues on the tracker) cc @pandas-dev/pandas-core @xhochy
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Arrow discards timezones
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2020-03-10T17:21:14Z
2020-03-10T19:27:27Z
2020-03-10T17:51:33Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python import pandas as pd from datetime import datetime, timezone df = pd.DataFrame.from_records([ (1, datetime.now().replace(tzinfo=timezone.utc)), (2, datetime.now().replace(tzinfo=timezone.min))], columns=["1", "2"]) print(df["2"]) print() df.to_feather("/tmp/1") df2 = pd.read_feather("/tmp/1") print(df2["2"]) ``` This code will output: ``` 0 2020-03-10 18:13:49.405598+00:00 1 2020-03-10 18:13:49.405626-23:59 Name: 2, dtype: object 0 2020-03-10 18:13:49.405598 1 2020-03-10 18:13:49.405626 Name: 2, dtype: datetime64[ns] ``` #### Problem description The round-trip dtype changed from the correct `object` to incorrect `datetime64`. Thus the timezones were discarded in Arrow and the timestamps became invalid. #### Expected Output (identical) ``` 0 2020-03-10 18:13:49.405598+00:00 1 2020-03-10 18:13:49.405626-23:59 Name: 2, dtype: object 0 2020-03-10 18:13:49.405598+00:00 1 2020-03-10 18:13:49.405626-23:59 Name: 2, dtype: object ``` #### Output of ``pd.show_versions()`` <details> ``` INSTALLED VERSIONS ------------------ commit : None python : 3.7.5.final.0 python-bits : 64 OS : Linux OS-release : 5.3.0-40-generic machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.0.1 numpy : 1.17.4 pytz : 2019.2 dateutil : 2.7.3 pip : 19.3.1 setuptools : 42.0.1 Cython : 0.29.14 pytest : 5.3.1 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : 4.5.0 html5lib : None pymysql : None psycopg2 : 2.8.4 (dt dec pq3 ext lo64) jinja2 : 2.10.3 IPython : 7.10.0 pandas_datareader: None bs4 : 4.8.1 bottleneck : None fastparquet : None gcsfs : None lxml.etree : 4.5.0 matplotlib : 3.1.2 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : 0.16.0 pytables : None pytest : 5.3.1 pyxlsb : None s3fs : None scipy : 1.2.1 sqlalchemy : 1.3.12 tables : None tabulate : None xarray : None xlrd : None xlwt : None xlsxwriter : None numba : None ``` </details>
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578,763,313
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32,588
parsing ragged csv doesn't return nan
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2020-03-10T18:00:23Z
2021-07-30T03:14:40Z
null
NONE
null
#### Code Sample, a copy-pastable example if possible ```python df2 = pd.read_csv(io.StringIO('col1,col2,col3\n2,1'), keep_default_na=False) ``` #### Problem description This returns an array of [[col1,col2,col3], [0,2,'']]. This doesn't make sense to me since the final row is malformed and doesn't have enough entries. I don't see any way to check if there are rows with too few columns. I can get rid of keep_default_na, but then Pandas won't distinguish between the above and the empty string: ```python df2 = pd.read_csv(io.StringIO('col1,col2,col3\n2,1,'), keep_default_na=False) ``` #### Expected Output An array of [[col1,col2,col3], [0,2,NaN]] or an Error. #### Output of ``pd.show_versions()`` <details> [paste the output of ``pd.show_versions()`` here below this line] machine: x86_64 processor: byteorder: little LC_ALL: None LANG: en_US.UTF-8 LOCALE: en_US.UTF-8 pandas: 0.24.2 pytest: None pip: None setuptools: None Cython: None numpy: 1.16.4 scipy: 1.2.1 pyarrow: None xarray: None IPython: None sphinx: None patsy: None dateutil: 2.8.1 pytz: 2019.3 blosc: None bottleneck: None tables: 3.5.2 numexpr: 2.6.10dev0 feather: None matplotlib: None openpyxl: None xlrd: 1.2.0 xlwt: None xlsxwriter: None lxml.etree: None bs4: None html5lib: None sqlalchemy: None pymysql: None psycopg2: None jinja2: 2.10.3 s3fs: None fastparquet: None pandas_gbq: None pandas_datareader: None gcsfs: None </details>
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32,589
regex with word boundary in pandas query expression doesn't work correctly
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2020-03-10T18:05:34Z
2020-06-07T00:34:21Z
null
NONE
null
Minimal example to highlight the issue I'm seeing when using pandas query to filter rows: #### Code Sample, a copy-pastable example if possible ```python df = pd.DataFrame(['A test case', 'Another Testing Case'], columns=list('A')) df.query("A.str.contains(r'\btest\b', regex=True, case=False)", engine='python') ``` (incorrectly) returns ```python Empty DataFrame Columns: [A] Index: [] ``` whereas #### Expected Output ```python df[df.A.str.contains(r'\btest\b', regex=True, case=False)] A 0 A test case ``` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.7.6.final.0 python-bits : 64 OS : Windows OS-release : 10 machine : AMD64 processor : Intel64 Family 6 Model 158 Stepping 10, GenuineIntel byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : None.None pandas : 1.0.1 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 45.2.0.post20200210 Cython : 0.29.15 pytest : 5.3.5 hypothesis : 5.5.4 sphinx : 2.4.0 blosc : None feather : 0.4.0 xlsxwriter : 1.2.7 lxml.etree : 4.5.0 html5lib : 1.0.1 pymysql : None psycopg2 : None jinja2 : 2.11.1 IPython : 7.12.0 pandas_datareader: None bs4 : 4.8.2 bottleneck : 1.3.2 fastparquet : None gcsfs : None lxml.etree : 4.5.0 matplotlib : 3.1.3 numexpr : 2.7.1 odfpy : None openpyxl : 3.0.3 pandas_gbq : None pyarrow : 0.15.1 pytables : None pytest : 5.3.5 pyxlsb : None s3fs : None scipy : 1.4.1 sqlalchemy : 1.3.13 tables : 3.6.1 tabulate : None xarray : None xlrd : 1.2.0 xlwt : 1.3.0 xlsxwriter : 1.2.7 numba : 0.48.0 </details>
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32,590
Histogram or kde from datetime column
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11
2020-03-10T18:15:03Z
2020-10-10T23:07:42Z
2020-10-10T23:07:42Z
NONE
null
It always annoyed me that it was not possible to generate a histogram or kernel density estimation plot from a datetime column. Is there interest in a solution following this approach? [Link to SO](https://stackoverflow.com/a/60617297) ```python import pandas as pd import numpy as np import matplotlib.pyplot as plt df = pd.DataFrame({"datetime": pd.to_datetime(np.random.randint(1582800000000000000, 1583500000000000000, 100, dtype=np.int64))}) fig, ax = plt.subplots() df["datetime"].astype(np.int64).plot.hist(ax=ax) labels = ax.get_xticks().tolist() labels = pd.to_datetime(labels) ax.set_xticklabels(labels, rotation=90) plt.show() ``` ![2UUMI](https://user-images.githubusercontent.com/31596773/76345209-3563b500-6303-11ea-8f81-d6a2198e8c4f.jpg) I didn't look into the the pandas source code yet, but if there is interest in something like this I will look into it. I think the main issue will be finding good x tick labels, if thats a requirement. Greetings!
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578,795,470
MDExOlB1bGxSZXF1ZXN0Mzg2MzA5OTgy
32,591
REG: dt64 shift with integer fill_value
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9
2020-03-10T18:59:28Z
2020-03-12T17:02:55Z
2020-03-12T02:26:13Z
MEMBER
null
- [x] closes #31971 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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MDExOlB1bGxSZXF1ZXN0Mzg2MzE3NzI3
32,592
DOC: cleanup 1.0.2 whatsnew
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0
2020-03-10T19:17:48Z
2020-03-11T12:20:39Z
2020-03-10T20:46:43Z
CONTRIBUTOR
null
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578,807,706
MDU6SXNzdWU1Nzg4MDc3MDY=
32,593
[BUG] Dataframe.rank() produces wrong results for float columns
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3
2020-03-10T19:23:15Z
2020-12-30T21:11:28Z
2020-12-30T21:11:28Z
NONE
null
#### Code to reproduce the issue ```python import numpy as np import pandas as pd indx = np.array([5, 4, 3, 2, 1, 6, 7, 8, 9, 10]) col1 = np.array([5, 4, 3, 5, 8, 5, 2, 1, 6, 6]) col2 = np.array([5, 4, np.nan, 5, 8, 5, np.inf, np.nan, 6, -np.inf]) pdf = pd.DataFrame(index=indx) pdf["col1"] = col1.astype('f8') pdf["col2"] = col2.astype('f8') ranked_df = pdf.rank() ranked_series = pd.DataFrame(index=indx) ranked_series["col1"] = pdf["col1"].rank() ranked_series["col2"] = pdf["col2"].rank() print(ranked_df.equals(ranked_series)) #False ``` #### Problem description Dataframe rank produces individual column ranks. But when float column is present, individual ranks are not equal to Dataframe rank. #### Expected Output `True` #### Output of ``pd.show_versions()`` <details> pd.show_versions() INSTALLED VERSIONS ------------------ commit : None python : 3.8.1.final.0 python-bits : 64 OS : Linux OS-release : 4.15.0-72-generic machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.0.1 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 46.0.0.post20200309 Cython : None pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : None IPython : 7.12.0 pandas_datareader: None bs4 : None bottleneck : None fastparquet : None gcsfs : None lxml.etree : None matplotlib : None numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pytest : None pyxlsb : None s3fs : None scipy : None sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None xlsxwriter : None numba : None </details>
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32,594
BUG: Don't multiply sets during construction
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2020-03-10T19:25:56Z
2020-03-15T00:42:47Z
2020-03-15T00:41:34Z
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- [x] closes #32582 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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32,595
DOCS SUGGESTION for pd.MultiIndex (Output of df.index.levels)
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2020-03-10T19:33:18Z
2021-07-30T03:18:03Z
2021-07-30T03:18:03Z
NONE
null
I've been wondering if it is possible to change the output of Example 2 to indicate that the index is a `FrozenList`. Currently it only indicates that it is an `Index` and I initially had trouble realizing that the index is also a `FrozenList` (and subsequently wondering why the frozen list index values weren't updating after modifying the original dataframe). If possible, I believe the inclusion of `FrozenList` would be helpful for users utilizing MultiIndex functionality of pandas. Input Dataframe ``` INPUT: df Box '1' '2' '3' Latency code latency loc code latency loc code latency loc 0 9170. 948. L. 8170. 328. R. 9160. 238. L. 1 7540 1501. R 9170. 9028. L. 7170. 94. L. ``` Example 1 ``` In:df.columns.levels Out: FrozenList([['1', '2', '3'], ['event_code', 'latency', 'location']]) ``` Example 2 ``` In:df.columns.levels[0] Out: Index(['1', '2', '3'], dtype='object', name='Box Number') ``` versions: python=3.6.8 pandas==1.0 Note: I originally asked this question on SO [Link](https://stackoverflow.com/questions/60623606/unexpected-behavior-for-pd-dataframe-drop-when-using-with-multilevel-index-dataf#60623606): #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.6.8.final.0 python-bits : 64 OS : Darwin OS-release : 18.7.0 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.0.0 numpy : 1.15.4 pytz : 2018.7 dateutil : 2.7.5 pip : 20.0.2 setuptools : 40.6.2 Cython : 0.29 pytest : 4.0.0 hypothesis : None sphinx : 2.2.0 blosc : None feather : None xlsxwriter : 1.1.2 lxml.etree : 4.2.5 html5lib : 1.0.1 pymysql : None psycopg2 : None jinja2 : 2.10 IPython : 7.1.1 pandas_datareader: None bs4 : 4.6.3 bottleneck : 1.2.1 fastparquet : None gcsfs : None lxml.etree : 4.2.5 matplotlib : 3.0.2 numexpr : 2.6.9 odfpy : None openpyxl : 2.5.9 pandas_gbq : None pyarrow : 0.14.1 pytables : None pytest : 4.0.0 pyxlsb : None s3fs : None scipy : 1.2.1 sqlalchemy : 1.2.14 tables : 3.4.4 tabulate : None xarray : 0.12.3 xlrd : 1.1.0 xlwt : 1.2.0 xlsxwriter : 1.1.2 numba : 0.40.0 </details>
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Backport PR #32592 on branch 1.0.x (DOC: cleanup 1.0.2 whatsnew)
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2020-03-10T20:46:56Z
2020-03-10T21:52:46Z
2020-03-10T21:52:46Z
NONE
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Backport PR #32592: DOC: cleanup 1.0.2 whatsnew
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REF: implement nanops.na_accum_func
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2020-03-10T21:41:06Z
2020-03-14T17:03:00Z
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this is a follow-up that was requested a few months ago
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BUG: Fix file descriptor leak
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2020-03-10T21:47:38Z
2020-03-15T07:14:03Z
2020-03-15T00:37:42Z
CONTRIBUTOR
null
- [x] closes #31488 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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578,898,136
MDU6SXNzdWU1Nzg4OTgxMzY=
32,599
[BUG] Groupby with as_index=False raises error when type is Category.
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1
2020-03-10T22:28:14Z
2020-06-15T12:29:19Z
2020-06-15T12:29:19Z
NONE
null
#### Code to reproduce the issue ```python import pandas as pd test = pd.DataFrame([[1, 1], [2, 2], [3, 3]], columns=['col1', 'col2']) test['col1'] = test['col1'].astype('category') test.groupby(['col1', 'col2'], as_index=False).size() ``` #### Problem description With pandas 1.0.1, the code throws an error `ValueError: No axis named 1 for object type <class 'pandas.core.series.Series'>`. With pandas 0.25.3, the code works, but `as_index` argument do not function as already mentioned in #25011. This happened with categorical type, the output of the new version is similar to 0.25.3 with other types. #### Expected Output | | col1 | col2 | 0 | |---:|-------:|-------:|----:| | 0 | 1 | 1 | 1 | | 1 | 1 | 2 | 0 | | 2 | 1 | 3 | 0 | | 3 | 2 | 1 | 0 | | 4 | 2 | 2 | 1 | | 5 | 2 | 3 | 0 | | 6 | 3 | 1 | 0 | | 7 | 3 | 2 | 0 | | 8 | 3 | 3 | 1 | #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.8.1.final.0 python-bits : 64 OS : Darwin OS-release : 19.3.0 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : None LOCALE : en_US.UTF-8 pandas : 1.0.1 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 45.2.0.post20200210 Cython : None pytest : 5.3.2 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : 1.0.1 pymysql : None psycopg2 : None jinja2 : 2.10.3 IPython : None pandas_datareader: None bs4 : 4.8.2 bottleneck : None fastparquet : None gcsfs : None lxml.etree : None matplotlib : 3.1.3 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pytest : 5.3.2 pyxlsb : None s3fs : None scipy : 1.4.1 sqlalchemy : None tables : None tabulate : 0.8.6 xarray : None xlrd : None xlwt : None xlsxwriter : None numba : None </details>
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578,903,528
MDU6SXNzdWU1Nzg5MDM1Mjg=
32,600
Pyarrow and custom dtypes
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1
2020-03-10T22:43:21Z
2020-03-11T00:19:29Z
2020-03-11T00:19:29Z
NONE
null
Hello, Are there anymore robust examples showing how to convert custom dtypes to and from Apache arrow? Essentially my dtype is a dictionary like data structure but I want to use the arrow storage format.
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32,601
TST: assert monotonic is True
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2020-03-10T22:52:20Z
2020-08-08T08:31:25Z
2020-03-10T22:59:20Z
CONTRIBUTOR
null
Makes tests for monoticity stricter. Follow-up to #23256.
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32,602
DOC: Fix link to monthly meeting calendar
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0
2020-03-10T23:20:13Z
2020-03-11T03:10:38Z
2020-03-11T03:10:38Z
MEMBER
null
The link we currently have for Google calendar is to embed, and let you see the calendar, but not subscribe to it. Fixing it here.
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32,603
Avoid bare pytest.raises in dtypes/cast/test_upcast.py
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1
2020-03-11T00:49:57Z
2020-03-21T00:41:45Z
2020-03-11T01:50:43Z
CONTRIBUTOR
null
* [x] ref #30999 * [x] tests added / passed * [x] passes `black pandas` * [x] passes `git diff origin/master -u -- "*.py" | flake8 --diff`
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32,604
Avoid bare pytest.raises in dtypes/test_dtypes.py
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2020-03-11T01:17:22Z
2020-03-11T02:48:21Z
2020-03-11T02:48:21Z
CONTRIBUTOR
null
* [x] ref #30999 * [x] tests added / passed * [x] passes `black pandas` * [x] passes `git diff origin/master -u -- "*.py" | flake8 --diff` Please be aware that I changed dtypes.py as there was a typo in the exception message.
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Backport PR #32499 on branch 1.0.x (Better error message for OOB result)
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2020-03-11T01:46:05Z
2020-03-11T02:33:53Z
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NONE
null
Backport PR #32499: Better error message for OOB result
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2020-03-11T01:53:52Z
2020-03-11T02:57:58Z
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NONE
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Backport PR #32386: BUG: Fix rolling functions with variable windows on decreasing index
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32,607
TST: fixturize skipna in test_nanops
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2020-03-11T03:09:37Z
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32,608
Deprecate fill_value argument for df.add
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2020-03-11T02:20:30Z
2020-09-25T22:37:01Z
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This came up in the submission for #13488 This is a documented argument but strangely not universally implemented for all argument types. Both @jbrockmendel and I agreed it is probably better to deprecate and push users towards using something like what @jreback suggested in https://github.com/pandas-dev/pandas/issues/13488#issuecomment-227016181
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32,609
Backport PR #32577 on branch 1.0.x (REG: Restore read_csv function for some file-likes)
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0
2020-03-11T02:22:12Z
2020-03-11T04:08:25Z
2020-03-11T04:08:25Z
NONE
null
Backport PR #32577: REG: Restore read_csv function for some file-likes
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32,610
CLN: Clean frame/test_constructors.py
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6
2020-03-11T02:41:46Z
2020-03-14T19:44:07Z
2020-03-14T19:41:00Z
MEMBER
null
I think these classes are all imported directly so don't need to reference the pandas namespace
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578,977,368
MDExOlB1bGxSZXF1ZXN0Mzg2NDU3ODcy
32,611
REF: implement _get_engine_target
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2
2020-03-11T03:01:59Z
2020-03-12T15:30:46Z
2020-03-12T04:30:03Z
MEMBER
null
Follow-up to #32467.
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32,612
CLN: remove Block.array_dtype, SingleBlockManager.array_dtype
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1
2020-03-11T04:35:40Z
2020-03-14T16:27:26Z
2020-03-14T03:30:13Z
MEMBER
null
We can get a more accurately-dtyped empty array instead.
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32,613
DOC: Validating that the word pandas is correctly capitalized
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17
2020-03-11T04:48:02Z
2020-04-01T15:36:21Z
2020-04-01T15:36:21Z
CONTRIBUTOR
null
- [x] closes #32316 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry As suggested by @datapythonista , I've added checks in `ci/code_checks.sh` to look if the `pandas` is being referenced in a standardized way i.e `pandas`, not ` *pandas* ` or `Pandas` @datapythonista I've only added checks to see if pandas is being referenced correctly, but not showing where it's changed or how many references are wrong. Should I add checks for that also ? What do you think ?
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32,614
Negated str.isnumeric() fails on column with None when called together with notnull() in the same boolean expression
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2020-03-11T06:52:27Z
2020-09-21T12:03:53Z
2020-09-21T12:03:53Z
NONE
null
#### Code Sample Create a dataframe: ``` import pandas as pd df = pd.DataFrame({'A': ['0', '1', '2', 'X', None]}) ``` Obviously this fails: ``` print(df[df.A.str.isnumeric()]) ``` So I can do this and it works: ``` print(df[df.A.notnull() & df.A.str.isnumeric()]) ``` However when negating the `str.isnumeric()` with unary `~` it fails: ``` print(df[df.A.notnull() & ~df.A.str.isnumeric()]) ``` Error message: >TypeError: bad operand type for unary ~: 'NoneType' Full error: <details> > print(df[df.A.notnull() & ~df.A.str.isnumeric()]) > Traceback (most recent call last): > > File "<ipython-input-32-9d35109941d7>", line 1, in <module> > df[df.A.notnull() & ~df.A.str.isnumeric()] > > File "C:\Users\My.Name\AppData\Local\Continuum\miniconda3\envs\main\lib\site-packages\pandas\core\generic.py", line 1473, in __invert__ > new_data = self._data.apply(operator.invert) > > File "C:\Users\My.Name\AppData\Local\Continuum\miniconda3\envs\main\lib\site-packages\pandas\core\internals\managers.py", line 440, in apply > applied = b.apply(f, **kwargs) > > File "C:\Users\My.Name\AppData\Local\Continuum\miniconda3\envs\main\lib\site-packages\pandas\core\internals\blocks.py", line 390, in apply > result = func(self.values, **kwargs) > > TypeError: bad operand type for unary ~: 'NoneType' </details> When doing it in two step it works: ``` dft = df[df.A.notnull()].copy() print(dft[~dft.A.str.isnumeric()]) ``` #### Problem description It's inconsistent for the combined expression to fail because of the unary `~`. #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.7.6.final.0 python-bits : 64 OS : Windows OS-release : 10 machine : AMD64 processor : Intel64 Family 6 Model 79 Stepping 1, GenuineIntel byteorder : little LC_ALL : None LANG : en LOCALE : None.None pandas : 1.0.1 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 46.0.0.post20200308 Cython : 0.29.15 pytest : None hypothesis : None sphinx : 2.4.4 blosc : None feather : None xlsxwriter : 1.2.8 lxml.etree : 4.5.0 html5lib : 1.0.1 pymysql : None psycopg2 : None jinja2 : 2.11.1 IPython : 7.13.0 pandas_datareader: None bs4 : 4.8.2 bottleneck : None fastparquet : 0.3.3 gcsfs : None lxml.etree : 4.5.0 matplotlib : 3.2.0 numexpr : None odfpy : None openpyxl : 3.0.3 pandas_gbq : None pyarrow : 0.16.0 pytables : None pytest : None pyxlsb : None s3fs : None scipy : 1.4.1 sqlalchemy : 1.3.13 tables : None tabulate : 0.8.6 xarray : None xlrd : 1.2.0 xlwt : None xlsxwriter : 1.2.8 numba : 0.48.0 </details>
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579,081,299
MDU6SXNzdWU1NzkwODEyOTk=
32,615
PARSE ERROR
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2020-03-11T08:12:49Z
2020-03-11T21:46:21Z
2020-03-11T21:46:21Z
NONE
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#### Code Sample, a copy-pastable example if possible ```python # Your code here PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! CODE:: import pandas as pd file1 = r'D:\C_pH\Book1 Lat_LongVspH.csv'; df = pd.read_csv(file1) **#### Output** ParserError Traceback (most recent call last) <ipython-input-2-21d97f424a6d> in <module> ----> 1 df = pd.read_csv(file1) C:\Users\KIIT\AppData\Roaming\Python\Python37\site-packages\pandas\io\parsers.py in parser_f(filepath_or_buffer, sep, delimiter, header, names, index_col, usecols, squeeze, prefix, mangle_dupe_cols, dtype, engine, converters, true_values, false_values, skipinitialspace, skiprows, skipfooter, nrows, na_values, keep_default_na, na_filter, verbose, skip_blank_lines, parse_dates, infer_datetime_format, keep_date_col, date_parser, dayfirst, cache_dates, iterator, chunksize, compression, thousands, decimal, lineterminator, quotechar, quoting, doublequote, escapechar, comment, encoding, dialect, error_bad_lines, warn_bad_lines, delim_whitespace, low_memory, memory_map, float_precision) 683 ) 684 --> 685 return _read(filepath_or_buffer, kwds) 686 687 parser_f._name_ = name C:\Users\KIIT\AppData\Roaming\Python\Python37\site-packages\pandas\io\parsers.py in _read(filepath_or_buffer, kwds) 461 462 try: --> 463 data = parser.read(nrows) 464 finally: 465 parser.close() C:\Users\KIIT\AppData\Roaming\Python\Python37\site-packages\pandas\io\parsers.py in read(self, nrows) 1152 def read(self, nrows=None): 1153 nrows = _validate_integer("nrows", nrows) -> 1154 ret = self._engine.read(nrows) 1155 1156 # May alter columns / col_dict C:\Users\KIIT\AppData\Roaming\Python\Python37\site-packages\pandas\io\parsers.py in read(self, nrows) 2057 def read(self, nrows=None): 2058 try: -> 2059 data = self._reader.read(nrows) 2060 except StopIteration: 2061 if self._first_chunk: pandas\_libs\parsers.pyx in pandas._libs.parsers.TextReader.read() pandas\_libs\parsers.pyx in pandas._libs.parsers.TextReader._read_low_memory() pandas\_libs\parsers.pyx in pandas._libs.parsers.TextReader._read_rows() pandas\_libs\parsers.pyx in pandas._libs.parsers.TextReader._tokenize_rows() pandas\_libs\parsers.pyx in pandas._libs.parsers.raise_parser_error() ParserError: Error tokenizing data. C error: Expected 1 fields in line 4, saw 3
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579,094,872
MDU6SXNzdWU1NzkwOTQ4NzI=
32,616
Incorrect result with DateOffset.rollback for normalize=True
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2020-03-11T08:40:46Z
2020-06-28T20:26:55Z
null
CONTRIBUTOR
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#### Code Sample, a copy-pastable example if possible ```python from pandas.tseries.offsets import MonthBegin MonthBegin(normalize=True).rollback('2020-4-1 12:34') Out[2]: Timestamp('2020-03-01 00:00:00') ``` #### Problem description It rollbacks to the beginning of the previous month instead of the current month. This happens only when normalize=True and the timestamp is within the first day of the month but strangely, it's correct for midnight: ```python from pandas.tseries.offsets import MonthBegin MonthBegin(normalize=True).rollback('2020-4-1 00:00') Out[3]: Timestamp('2020-04-01 00:00:00') ``` #### Expected Output ``` Out[2]: Timestamp('2020-04-01 00:00:00') ``` In general, I would expect the following to hold for any timestamp `dt`: ```python assert MonthBegin(normalize=True).rollback(dt) == MonthBegin().rollback(dt.normalize()) ``` #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : None python : 3.6.8.final.0 python-bits : 64 OS : Windows OS-release : 10 machine : AMD64 processor : Intel64 Family 6 Model 78 Stepping 3, GenuineIntel byteorder : little LC_ALL : None LANG : None LOCALE : None.None pandas : 1.0.1 numpy : 1.18.1 pytz : 2019.3 dateutil : 2.8.1 pip : 20.0.2 setuptools : 40.6.2 Cython : 0.29.4 pytest : 5.3.5 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : 1.2.8 lxml.etree : 4.5.0 html5lib : 1.0.1 pymysql : None psycopg2 : None jinja2 : 2.11.1 IPython : 7.13.0 pandas_datareader: None bs4 : 4.6.1 bottleneck : 1.3.1 fastparquet : None gcsfs : None lxml.etree : 4.5.0 matplotlib : 3.2.0 numexpr : 2.7.1 odfpy : None openpyxl : 3.0.3 pandas_gbq : None pyarrow : None pytables : None pytest : 5.3.5 pyxlsb : None s3fs : 0.2.1 scipy : 1.4.1 sqlalchemy : 1.3.13 tables : None tabulate : 0.8.6 xarray : 0.15.0 xlrd : 1.2.0 xlwt : 1.3.0 xlsxwriter : 1.2.8 numba : None </details>
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