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384,120,544
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23,912
TST: split up pandas/tests/indexing/test_multiindex.py
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2018-11-25T21:25:23Z
2018-11-30T09:21:58Z
2018-11-29T13:51:05Z
MEMBER
null
- [n/a ] follow on from #23797 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ n/a] whatsnew entry only whole tests moved, tests have not been split up. this and the removal of classes is left for a follow-on PR.
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23,913
Fix the docstring of xs in pandas/core/generic.py #22892
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2018-11-25T23:07:56Z
2018-12-02T18:20:21Z
2018-12-02T18:06:08Z
CONTRIBUTOR
null
- [X] closes #22892 - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry Hello @datapythonista ! As requested in #22892 , I corrected the docstring of the pandas/core/generic.py xs function to pass correctly the following command : ./scripts/...
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384,133,354
MDU6SXNzdWUzODQxMzMzNTQ=
23,914
is_datetimelike treatment of PeriodDtype inconsistent
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2018-11-25T23:56:16Z
2019-11-07T21:23:32Z
2019-11-07T21:23:32Z
MEMBER
null
xref #22137 ``` def is_datetimelike(arr): """ [...] """ return (is_datetime64_dtype(arr) or is_datetime64tz_dtype(arr) or is_timedelta64_dtype(arr) or isinstance(arr, ABCPeriodIndex) or is_datetimetz(arr)) ```` `is_datetimetz` is AFAICT redundant with `is_dat...
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https://api.github.com/repos/pandas-dev/pandas/issues/23915
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384,143,915
MDExOlB1bGxSZXF1ZXN0MjMzNDE3MjY0
23,915
BUG - remove scaling multiplier from `Period` diff result
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2018-11-26T01:35:57Z
2018-12-09T14:02:21Z
2018-12-09T14:02:18Z
CONTRIBUTOR
null
- [ ] closes #23878 - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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384,146,634
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23,916
REF: DatetimeIndex constructor fixups
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3
2018-11-26T01:56:38Z
2018-11-26T16:57:05Z
2018-11-26T13:50:52Z
MEMBER
null
Small non-central pieces broken off from #23675.
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23,917
CLN: Remove/deprecate unused/misleading dtype functions
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2018-11-26T03:11:25Z
2018-11-27T18:48:53Z
2018-11-27T18:01:54Z
MEMBER
null
For "misleading" the leading case is `is_int_or_datetime_dtype`, which includes timedelta64 but excludes datetime64tz. Several branches in `lib.infer_dtype` are unreachable, are removed. `is_datetimetz` is redundant with `is_datetime64tz_dtype`, is deprecated, and internal uses of it are changed. `is_period` i...
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384,158,374
MDU6SXNzdWUzODQxNTgzNzQ=
23,918
Shifting GroupBy Object with ``freq`` inserts unwanted index level
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2018-11-26T03:14:59Z
2020-04-01T04:01:48Z
null
MEMBER
null
IMO somewhat unexpected behavior depending on the arguments provided to shift after a groupby: ```python In [26]: ser = pd.Series(range(3), index=pd.date_range('1/1/18', periods=3)) In [28]: ser.groupby([1,1,1]).shift() ...
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MDExOlB1bGxSZXF1ZXN0MjMzNDI5Mjcx
23,919
DEPR: Deprecate passing range-like arguments to DatetimeIndex, TimedeltaIndex
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2018-11-26T03:31:46Z
2018-11-28T23:38:12Z
2018-11-28T23:34:58Z
MEMBER
null
Also `verify_integrity` since allowing that to be False complicates things, and internally if its False we should be using simple_new anyway - [x] closes #20535 - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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23,920
Install numpy and cython when you run make if they were not present
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2018-11-26T07:57:23Z
2021-02-06T18:51:12Z
2021-02-06T18:51:12Z
CONTRIBUTOR
null
I created a new virtual env and run `make`, the installation exited with saying ``` 02:31 $ make python setup.py build_ext --inplace Traceback (most recent call last): File "/home/dtdev/.virtualenvs/pandas/lib/python3.6/site-packages/pkg_resources/__init__.py", line 357, in get_provider module = sys.modul...
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384,244,851
MDExOlB1bGxSZXF1ZXN0MjMzNDkwOTQw
23,921
Proper boxing of scalars in `DataFrame.to_dict`
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15
2018-11-26T09:37:53Z
2018-12-02T19:20:22Z
2018-12-02T19:20:17Z
CONTRIBUTOR
null
- [x] closes #23753 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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384,249,513
MDU6SXNzdWUzODQyNDk1MTM=
23,922
TST: Disallow bare pytest.raises
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44
2018-11-26T09:50:04Z
2020-01-14T12:24:51Z
2020-01-14T12:24:50Z
MEMBER
null
End users rely on error messages for their debugging purposes. Thus, it is important that we make sure that the correct error messages are surfaced depending on the error triggered. <strike>I would like to propose that we disallow the following:</strike> I think we should convert the following: ~~~python with ...
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384,284,619
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23,923
TST: Review if we are really testing with different locales
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4
2018-11-26T11:19:32Z
2019-04-05T00:42:57Z
2019-04-05T00:42:57Z
MEMBER
null
In the scripts for the CI, we set the locale with: ``` export LC_ALL="$LOCALE_OVERRIDE"; export LANG="$LOCALE_OVERRIDE"; ``` and immediately later we display the locale detected by pandas: ``` pycmd='import pandas; print("pandas detected console encoding: %s" % pandas.get_option("display.encoding"))' python -c ...
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384,289,404
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23,924
TST/CI: Unify CI test scripts (single and multi) and simplify the system
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2018-11-26T11:33:03Z
2018-11-30T21:33:47Z
2018-11-30T21:33:43Z
MEMBER
null
- [X] refs #23658 - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry The goal of this PR is: - Avoid repetitive code by merging `ci/script_single.sh` and `ci/script_multi.sh` - Simplify calls to different tests (mainly slow vs not slow), by avoid...
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384,306,115
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23,925
DataFrame Quantile Broken with Datetime Data
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1
2018-11-26T12:21:36Z
2019-07-24T12:07:14Z
2019-07-24T12:07:14Z
MEMBER
null
This works fine: ```python In [17]: pd.Series(pd.date_range('1/1/18', periods=5)).quantile() Out[17]: Timestamp('2018-01-03 00:00:00') ``` But the equivalent method with a DataFrame raises: ```python-traceback In [18]: pd.DataFrame(pd....
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384,306,415
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23,926
Please introduce a simple way to entirely disable the “sniffer”
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1
2018-11-26T12:22:26Z
2018-11-26T12:25:28Z
2018-11-26T12:25:28Z
NONE
null
I am reading in a Csv file with one column which contains lots of codes, some of which include poorly dumped data formatted to scientific notation in error. My problem arises when pandas converts the data from ‘object’ to float and then into scientific notation despite the dtype setting being set to str. After sea...
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384,314,081
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23,927
Cython language_level Warning - switch to Python3?
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5
2018-11-26T12:44:31Z
2019-03-19T23:48:32Z
2019-03-19T23:48:32Z
MEMBER
null
When compiling with Cython the following warning gets issued: ```bash Cython/Compiler/Main.py:367: FutureWarning: Cython directive 'language_level' not set, using 2 for now (Py2). This will change in a later release! File: clones/pandas/pandas/_libs/groupby.pxd ``` Haven't looked into the implications as of yet...
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23,928
TST: Run tests using a database explicitly
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4
2018-11-26T16:11:47Z
2018-12-29T02:11:03Z
2018-12-29T02:11:03Z
MEMBER
null
At the moment, our tests accessing a database (in `pandas/tests/io/test_sql.py`) are being skipped if the module to connect to the database are not installed (e.g. `pymysql` or `psycopg2`), or if the connection to the database doesn't succeed. This has two implications: - It's not easy in the CI to know which build...
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384,421,868
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23,929
Dtype checking in reshape.merge
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2018-11-26T16:55:48Z
2020-06-06T16:10:05Z
2020-06-06T16:10:05Z
MEMBER
null
There is a check (equivalent to) ``` elif (issubclass(lk.dtype.type, (np.integer, np.timedelta64, np.datetime64)) and issubclass(rk.dtype.type, (np.integer, np.timedelta64, np.datetime64))): ``` which I'm told is incorrect: > this is not right, these should be in separate branches here, the datetime /...
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23,930
check_comprehensiveness breaks running a subset of tests
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0
2018-11-26T20:55:57Z
2020-10-29T00:58:48Z
2020-10-29T00:58:48Z
CONTRIBUTOR
null
https://github.com/pandas-dev/pandas/blob/b7294dd3ec47dffa50f3c8bdf89aa8a01f4494f2/pandas/tests/indexing/test_coercion.py#L19 so I can't run, e.g. `pytest pandas/tests/indexing/test_coercion.py::TestFillnaSeriesCoercion::test_fillna_datetime64tz`, which is a tad annoying. Can we rewrite the check to be aware of what...
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384,507,823
MDU6SXNzdWUzODQ1MDc4MjM=
23,931
`join` on tz-aware column and tz-aware index wrongly fails (regression from 0.22)
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2018-11-26T20:59:18Z
2019-02-11T18:53:42Z
2019-02-11T18:53:42Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python df1 = pd.DataFrame( { 'date': pd.date_range(start='2018-01-01', periods=5,tz='America/Chicago'), 'vals':list('abcde') } ) df2 = pd.DataFrame( { 'date': pd.date_range(start='2018-01-03',periods=5, tz='Ameri...
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MDU6SXNzdWUzODQ1MTQ3ODc=
23,932
Series[datetime64[ns, tz]].__setitem__ fails to coerce for ndarray value
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2
2018-11-26T21:19:49Z
2019-01-02T18:20:35Z
2019-01-02T18:20:35Z
CONTRIBUTOR
null
What's the expected output for ```python In [9]: a = pd.Series(pd.DatetimeIndex(['2000', '2000'], tz="UTC")) In [10]: a.loc[:] = np.array([pd.Timestamp('2000', tz="UTC")] * 2) ``` On master, we coerce `self` to `object` and then set. ```python In [11]: a Out[11]: 0 2000-01-01 00:00:00+00:00 1 20...
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23,933
Potential regression in master re empty Extension Indexes
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2018-11-26T22:11:44Z
2019-01-03T22:04:55Z
2019-01-03T22:04:55Z
CONTRIBUTOR
null
Setting an additional index on a DataFrame with an empty PeriodIndex raises a couple of exceptions: ```python In [2]: df = pd.DataFrame(dict(a=1), index=pd.PeriodIndex(start='2000', freq='B', periods=0, name='date')) df Out[2]: Empty DataFrame Columns: [a] Index: [] [ins] In [10]: df.set_index('a', ap...
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23,934
show_versions fails on master with latest lxml
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2018-11-26T22:15:42Z
2018-11-29T12:23:40Z
2018-11-29T12:23:40Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python [ins] In [1]: import pandas as pd p [ins] In [2]: pd.show_versions() --------------------------------------------------------------------------- AttributeError Traceback (most recent call last) <ipython-input-2-3d232a07e...
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23,935
Add asv benchmarks for essential functions
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2018-11-26T22:42:00Z
2018-11-28T00:48:37Z
2018-11-27T22:27:16Z
CONTRIBUTOR
null
I've jury-rigged `asv` with `coverage` to enable automatic identification of what parts of the code base are lacking `asv` benchmark coverage and found a number of essential functions on my first pass: - `pd.DataFrame.rename()` - `pd.cut()` / `pd.qcut()` - `.dot()` - Any `.plot()` method other than `line` - L...
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DOC: fix DataFrame.quantile docstring and doctests
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2018-11-27T00:51:14Z
2018-12-09T18:49:39Z
2018-12-09T15:55:49Z
CONTRIBUTOR
null
- [x] closes #22898 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` Based on #22459. Fix the docstring for DataFrame.quantile. I also updated `ci/code_checks.sh`.
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DEPR: passing timedelta-like to DatetimeIndex constructor, xref #23675
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2018-11-27T01:02:42Z
2018-11-27T01:45:28Z
2018-11-27T01:43:18Z
MEMBER
null
Implements the agreed-upon portions of #23675 so we can keep moving the ball down the field. - [ ] closes #xxxx - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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TST: Suppress dateutil DeprecationWarning in setup.cfg
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2018-11-27T01:09:21Z
2018-11-27T04:17:47Z
2018-11-27T04:01:39Z
MEMBER
null
Then do some isorts for kicks
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DOC: fix DataFrame.replace and DataFrame.set_index docstrings
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3
2018-11-27T01:17:02Z
2018-12-02T11:33:25Z
2018-11-29T13:55:31Z
CONTRIBUTOR
null
- [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` Based on #22459. Fix the docstring for DataFrame.replace and DataFrame.set_index. I put them together since set_index was quite simple: there was two Returns sections. I also updated ci/code_checks.sh. DataFrame.stack...
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CLN: Cython Py2/3 Compatible Imports
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2018-11-27T03:31:31Z
2018-12-26T23:51:44Z
2018-12-26T23:50:50Z
MEMBER
null
- [ ] progress towards #23927 - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry @jbrockmendel
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BUG/ENH - base argument no longer ignored in period resample
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2018-11-27T05:25:20Z
2018-12-14T14:57:34Z
2018-12-14T14:57:29Z
CONTRIBUTOR
null
- [ ] closes #23882 - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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23,942
dropna() function has no subset in python 3.7
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2018-11-27T05:29:12Z
2018-11-27T05:42:46Z
2018-11-27T05:31:59Z
NONE
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#### Code Sample, a copy-pastable example if possible ```python ``` #### Problem description [this should explain **why** the current behaviour is a problem and why the expected output is a better solution.] **Note**: We receive a lot of issues on our GitHub tracker, so it is very possible that your issu...
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23,943
CLN: Fixturize test_base.py
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2018-11-27T07:10:52Z
2019-02-27T23:50:05Z
2019-02-27T23:50:05Z
CONTRIBUTOR
null
Partially Fixes #23877 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry @jreback Could you please review the fixtures, I haven't replaced all the `indexes` if the changes are correct I would fixturize other test cases
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23,944
to_json() to_csv() don't act the same for dates in iso format
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2018-11-27T07:32:44Z
2018-11-27T09:06:53Z
2018-11-27T09:06:53Z
NONE
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I posted it on stackoverflow but this seems more like a bug / missing feature? https://stackoverflow.com/questions/53494416/pandas-data-frame-to-json-to-csv-dont-act-the-same-for-dates-in-iso-forma In Json the dates appear as: `"lastDeliveryDate":1543258826689` In CSV the dates appear as: ``` lastDeliveryDa...
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Fixing shift() for ExtensionArray
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2018-11-27T08:35:12Z
2018-11-27T09:51:02Z
2018-11-27T09:50:36Z
CONTRIBUTOR
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- [x] closes #23911 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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23,946
DataFrame:iterrows() damages data integrity during interations
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2018-11-27T09:27:20Z
2018-11-27T12:35:57Z
2018-11-27T12:29:49Z
NONE
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#### Code Sample, a copy-pastable example if possible ```python # Your code here for _, row_arr in DataFrame.iterrows(): ``` #### Problem description For a DataFrame, there is one column that contains complex numbers Once interating rows, all the values in each row become complex, where the real part is the...
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2018-11-27T09:59:01Z
2018-12-09T12:09:32Z
2018-12-09T12:09:23Z
CONTRIBUTOR
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- [x] closes #23911 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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DOC: fix double Returns section in set_index docstring
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2018-11-27T13:31:52Z
2018-11-27T21:09:21Z
2018-11-27T17:15:29Z
MEMBER
null
Should fix the broken doc build
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23,949
BUG: Fix lxml import in show_versions
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7
2018-11-27T17:41:57Z
2018-11-29T12:23:46Z
2018-11-29T12:23:40Z
CONTRIBUTOR
null
Fixed lxml import issue - [x] closes #23934 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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23,950
pandas to_feather “Unsupported numpy type 5” and force df.eval() to explicit dtype
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1
2018-11-27T18:12:46Z
2018-11-27T18:44:37Z
2018-11-27T18:44:24Z
NONE
null
I've got a 500GB datafile that I'm modifying with df.eval() and then saving in feather format. Here is an example program showing the feather error: import pandas as pd ``` df = pd.DataFrame([[1.0, 0.678, 'hello'], [2.0, 0.779, 'foo'], [3.0, 0.218, 'bar']], dtype='float32', columns=['x','y','txt']) print(df) p...
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23,951
Feature Request: add a startday argument to pandas.DatetimeIndex.dayofweek?
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1
2018-11-27T18:31:22Z
2019-01-13T19:20:55Z
null
CONTRIBUTOR
null
Not sure if this is feasible or if there is support for it. https://pandas.pydata.org/pandas-docs/stable/generated/pandas.DatetimeIndex.dayofweek.html gives the day of the week with Monday=0, Sunday=6. For my application I would like Sunday=0 and Saturday=6. I wonder if there could be a startday argument to `...
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23,952
DOC: Use a standard header for all rst files
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2018-11-27T18:44:51Z
2018-12-09T17:53:01Z
2018-12-09T17:53:01Z
MEMBER
null
When we build the documentation from the `.rst` files in `doc/source/`, we use a variable `common_imports` that is added as context for sphinx, and that is used in the `whatsnew` files. But more or less the same imports and options that are used in the `whatsnew` files, are used in most `.rst` files. What would b...
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23,953
Implement TimedeltaArray._from_sequence
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2018-11-27T20:46:24Z
2018-11-29T22:34:01Z
2018-11-29T22:04:15Z
MEMBER
null
and have both `TimedeltaArray.__new__` and `TimedeltaIndex.__new__` dispatch to it One test will fail until #23789 is merged. - [ ] closes #xxxx - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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23,954
DOC: failing example in the read_csv docs
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3
2018-11-27T21:20:20Z
2018-11-29T16:32:40Z
2018-11-29T16:32:40Z
MEMBER
null
On the travis build on master, we have the following traceback: ``` >>>------------------------------------------------------------------------- Exception in /home/travis/build/pandas-dev/pandas/doc/source/io.rst at block ending on line 668 Specify :okexcept: as an option in the ipython:: block to suppress this m...
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23,955
Bug: Pivot fails for MultiIndex If existing index is used.
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2018-11-27T21:20:32Z
2021-06-23T04:56:11Z
null
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#### Code Sample, a copy-pastable example ```python df = pd.DataFrame([['A', 'A1', 'label1', 1], ['A', 'A2', 'label2', 2], ['B', 'A1', 'label1', 3], ['B', 'A2', 'label2', 4]], columns=['index_1', 'index_2', 'label', 'value']) df = df.set_index(['index_1', 'index_2']) p...
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23,956
Ensure that DatetimeArray keeps reference to original data
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2018-11-27T22:07:12Z
2018-11-28T16:22:27Z
2018-11-28T16:22:24Z
CONTRIBUTOR
null
(cherry picked from commit 49f6495ba5ceef35a7a962f20e8b863c544592b7) This avoids a segfault I (and possibly @jbrockmendel) were seeing on our datetimearray branches from us freeing a region of memory we didn't allocate. I haven't really groked things yet, but `_libs/reduction.pyx::Slider` is doing some strange th...
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isort plotting, a handful of test dirs
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2018-11-27T22:17:38Z
2018-11-28T14:37:45Z
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MEMBER
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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pd.read_hdf bug
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2018-11-27T22:32:19Z
2018-11-27T23:09:51Z
2018-11-27T23:09:51Z
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Seems related to #18252 Link to the hdf5 file to reproduce: https://www.dropbox.com/s/kwwv6hqtdpswkf9/behavior.hdf5?dl=0 #### Code Sample These 2 codes: ```python from pandas import read_hdf events = read_hdf('./behavior.hdf5') ``` ```python from h5io import read_hdf5 events = read_hdf5('./behavior.hdf5...
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385,017,049
MDU6SXNzdWUzODUwMTcwNDk=
23,959
tz_compare fails to consider string "UTC" and pytz UTC object equal
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9
2018-11-27T22:33:59Z
2021-01-19T22:43:13Z
2021-01-19T22:43:13Z
CONTRIBUTOR
null
Nothing user-facing here, but this surprised me. ```python In [5]: pd._libs.tslibs.timezones.tz_compare("UTC", pytz.timezone("UTC")) Out[5]: False ``` Other timezones behave as expected ``` In [6]: pd._libs.tslibs.timezones.tz_compare("US/Eastern", pytz.timezone("US/Eastern")) Out[6]: True ``` Is this...
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23,960
Wrong argument documentation for reindex_axis
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2018-11-28T00:14:27Z
2018-12-09T08:03:17Z
2018-12-09T08:02:19Z
CONTRIBUTOR
null
#### Problem description The documentation for ``DataFrame.reindex_axis()`` has incorrect documentation for the arguments. The function signature is correct, but the description of ``fill_value`` is missing and there's a description of a ``tolerance`` argument that isn't accepted by the actual method. This can caus...
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23,961
Collect Index methods by purpose: rendering, constructors, setops...
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2018-11-28T01:09:02Z
2018-11-28T18:47:57Z
2018-11-28T17:45:47Z
MEMBER
null
Zero changes to the contents of _any_ methods, just collecting them in reasonably-scoped sections.
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23,962
Feature Request: Bootstrap sample from DataFrame with MultiIndex
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2018-11-28T01:23:04Z
2019-01-13T19:22:29Z
null
NONE
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The `sample` method for DataFrames samples at the row level (by default). Often, one may want to sample at a coarser level, say when the top level of a MultiIndex corresponds to the sampling unit. It's likely that there are a variable number of rows per sampling unit in this case. There were two promising stacko...
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MDExOlB1bGxSZXF1ZXN0MjM0MTI0MjIz
23,963
BUG: CategoricalIndex allows reindexing with non-unique CategoricalIndex
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2018-11-28T02:12:03Z
2018-12-02T23:10:48Z
2018-12-02T23:10:44Z
CONTRIBUTOR
null
`CategoricalIndex.reindex()` throws a `ValueError` if the target index is non-unique *and* not also a `CategoricalIndex`. This means a non-unique `CategoricalIndex` can be used to reindex, resulting in duplicated data: ``` In [1]: import pandas as pd categorical_index = pd.CategoricalIndex(['bar', 'foo', 'ba...
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23,964
merge left_on enter multiple columns of content
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2018-11-28T03:19:26Z
2018-11-30T05:44:00Z
2018-11-29T15:53:41Z
NONE
null
#### Code Sample, a copy-pastable example if possible k=pd.DataFrame({ "a":"222222", "b":"33333", },index=[[0]]) m=pd.DataFrame({ "c":"222222", "n":"6554413" },index=[[0]]) pd.merge(k,m,left_on=("a","b"),right_on=("c","n")) ``` #### Problem description I want to me...
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23,965
DataFrame: damage data integrity in conversion and iterations
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2018-11-28T06:27:41Z
2020-01-24T07:04:55Z
2020-01-24T07:04:55Z
NONE
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#### Code Sample, a copy-pastable example if possible ```python # Your code here import pandas as pd d = {'col1': [1, 2, 3], 'col2': [4, 5+1j, 6]} dftemp = pd.DataFrame(d) dftemp['col2'] dstemp = pd.Series({'col2': [4, 5+1j, 6]}) ``` #### Problem description dftemp['col2'] shows all vaues as below are com...
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23,966
CLN: Add missing types to tslib.pyx
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2018-11-28T06:41:59Z
2018-11-28T18:14:02Z
2018-11-28T13:45:35Z
MEMBER
null
These are just variables that were missing type declarations.
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23,967
Unable to read large json file of 218MB
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2018-11-28T06:44:31Z
2018-11-28T18:19:16Z
2018-11-28T18:19:15Z
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#### Code Sample, a copy-pastable example if possible ```python # Your code here import pandas as pd import matplotlib.pyplot as plt import json import dask.dataframe as dd import time df = pd.read_json('Studies\\01-10Aug.json',chunksize=4000,lines=True) df=pd.DataFrame(df) df ``` #### Problem description...
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23,968
GH20591 read_csv raise ValueError for bool columns with missing values (C engine)
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2018-11-28T08:11:46Z
2018-12-02T16:22:04Z
2018-12-02T16:22:01Z
CONTRIBUTOR
null
- [X] closes #20591 - [X] tests added / passed - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [X] whatsnew entry As explained in the referenced issue, trying to cast missing values to bool dtype should result in a ValueError similar to when casting to int
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385,205,770
MDExOlB1bGxSZXF1ZXN0MjM0MjI3NjI4
23,969
ERR: Raise the correct error for to_datetime()
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10
2018-11-28T10:43:00Z
2019-02-28T04:02:44Z
2019-02-27T23:50:52Z
CONTRIBUTOR
null
- [x] closes #23830 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry Verified that it does not affect the fixes by #19529 (for issue #19382)
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385,250,787
MDU6SXNzdWUzODUyNTA3ODc=
23,970
groupby observed=True not working for aggregating a column
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2
2018-11-28T12:42:52Z
2018-12-31T13:25:06Z
2018-12-31T13:25:06Z
NONE
null
In the following the parameter `observed=True` will be ineffective (in pandas 0.23.4) ```python import pandas as pd dd=pd.DataFrame({"c":pd.Series([1,1,2], dtype="category"), "i":[1,2,2], "x":[1, 2, 3]}) gr=dd.groupby(["c", "i"], as_index=False, observed=True)["x"].sum() gr # will contain a NaN for c=2, i=1 ```...
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385,301,084
MDExOlB1bGxSZXF1ZXN0MjM0MzAyNjE2
23,971
GroupBy Cleanup
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2
2018-11-28T14:45:33Z
2018-11-28T22:28:01Z
2018-11-28T22:27:41Z
MEMBER
null
Random Str formatting changes and removal of unneeded subclass overrides
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385,301,810
MDExOlB1bGxSZXF1ZXN0MjM0MzAzMTg1
23,972
Groupby Whitelist Cleanup
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7
2018-11-28T14:47:10Z
2018-12-26T23:51:24Z
2018-12-25T18:06:26Z
MEMBER
null
All of these methods are defined on the base GroupBy class so these essentially are no-ops in current state.
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385,378,708
MDExOlB1bGxSZXF1ZXN0MjM0MzYzNDE2
23,973
Collect methods in generic/frame/series by purpose
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3
2018-11-28T17:29:02Z
2018-11-28T22:39:00Z
2018-11-28T22:25:10Z
MEMBER
null
Analogous to #23961. Less aggressive since these classes are massive.
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23,974
CLN: keyerror in versioneer error message
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4
2018-11-28T17:55:08Z
2018-11-28T22:22:21Z
2018-11-28T22:22:18Z
CONTRIBUTOR
null
broken formatting code from the cleanup in #18010 Not sure if this can be realistically tested - something weird in my local git causing tags to not come through - only impacts dev version reporting. before: ```python-tb import pandas as pd # import fails ~\Documents\python-dev\pandas\pandas\__init__.py in...
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23,975
Fix build by removing flake8-rst
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2018-11-28T18:30:34Z
2018-11-29T10:21:27Z
2018-11-29T10:21:27Z
MEMBER
null
Seems like `flake8-rst==0.4.2` is not available in conda anymore. This is making the Travis build fail. Newer versions of `flake8-rst` are not usable yet, as they validate more things than `0.4.2` and validating our docs would fail the CI too. We're working on fixing all the flake8-rst linting problems in the docs, ...
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23,976
isort tests/reshape, plotting, sparse
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2018-11-28T19:05:24Z
2018-11-28T23:42:52Z
2018-11-28T23:42:41Z
MEMBER
null
- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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MDU6SXNzdWUzODU0MTUzMTU=
23,977
(Suggestion) Alert user when passing %p and %H in same format
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2018-11-28T19:09:35Z
2021-06-23T04:57:30Z
null
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#### Code Sample, a copy-pastable example if possible ```python child['Timestamp'] = pd.to_datetime(child['Timestamp'], format='%d-%b-%y %H:%M:%S %p') child.to_csv('test.csv') ``` #### Problem description Short and sweet, when passing data into a formater 12 hour date time formats will pass when using a 24 h...
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23,978
BUG/TST: PeriodArray.__setitem__ with slice and list-like value fails
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2018-11-28T20:59:28Z
2018-12-02T23:19:01Z
2018-12-02T23:19:01Z
CONTRIBUTOR
null
```python In [1]: import pandas as pd; import numpy as np In [2]: arr = pd.core.arrays.period_array([2000, 2001], 'D') In [3]: arr[:1] = ['2001'] --------------------------------------------------------------------------- TypeError Traceback (most recent call last) <ipython-i...
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MDU6SXNzdWUzODU0Njg3NjI=
23,979
CLN: Refactor PeriodArray._format_native_types to use DatetimeArray
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2018-11-28T21:41:30Z
2018-11-28T21:41:51Z
null
CONTRIBUTOR
null
Once we have a DatetimeArray, we'll almost be able to share the implementation of `_format_native_types`. The main sticking point is that Period has a different default date format. It only prints the resolution necessary for the frequency. ```python In [2]: pd.Timestamp('2000') Out[2]: Timestamp('2000-01-01 00:...
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23,980
BUG: pandas.cut should disallow overlapping IntervalIndex bins
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2018-11-28T21:42:27Z
2018-12-01T00:17:13Z
2018-12-01T00:17:13Z
MEMBER
null
#### Code Sample, a copy-pastable example if possible ```python In [2]: ii = pd.IntervalIndex.from_tuples([(0, 10), (2, 12), (4, 14)]) In [3]: pd.cut([5, 6], bins=ii) Out[3]: [(0, 10], (2, 12], (4, 14], (0, 10], (2, 12], (4, 14]] Categories (3, interval[int64]): [(0, 10] < (2, 12] < (4, 14]] ``` #### Proble...
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23,981
PERF: ascii c string functions
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14
2018-11-28T22:16:22Z
2018-12-05T20:21:26Z
2018-12-05T20:21:24Z
CONTRIBUTOR
null
- [x] closes #23516 - [ ] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry This ends up being kind of hairy - open to suggestions on a better fix. cc @dragoljub, @cgohlke Timings ```python df = pd.DataFrame(np.random.randn(1000000, 10), ...
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23,982
TST: add test coverage for maybe_promote
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50
2018-11-28T22:21:35Z
2019-10-26T18:22:15Z
2019-10-11T15:13:02Z
CONTRIBUTOR
null
- [x] first step for #23833 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] fixes a regression that was silently introduced in #23796 due to lack of tests The errors I found for `core.dtypes.cast.maybe_promote` in #23833 were just scratching the surface. I sp...
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23,983
TST: fix fixture for numpy dtypes
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2018-11-28T22:29:59Z
2018-11-29T22:33:15Z
2018-11-29T22:01:48Z
CONTRIBUTOR
null
- [x] split off from #23982 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` This was one of the things I stumbled over while working on #23982. There's a fixture for all_numpy_dtypes that got introduced in #21899, but it's a lie - it doesn't cover (nearly) all numpy ...
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CLN: Add missing types to tslibs/conversion.pyx
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4
2018-11-28T23:22:12Z
2018-12-02T04:13:14Z
2018-11-29T12:46:43Z
MEMBER
null
Again just variables that were not typed, and removing some unused variables.
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23,985
BUG: Incorrect Type Inference with NaT
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2018-11-28T23:30:45Z
2021-06-23T04:59:52Z
null
MEMBER
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``` >>> tdi = pd.TimedeltaIndex(['1 Day', 'NaT']) >>> df = pd.DataFrame([tdi]) # i.e. 1 row, 2 columns >>> df.dtypes 0 timedelta64[ns] 1 datetime64[ns] dtype: object ``` The second column should also be `timedelta64[ns]` dtype.
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23,986
DatetimeIndex doesn't validate `dtype` argument
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2018-11-28T23:42:37Z
2019-03-31T18:00:34Z
2019-03-31T18:00:34Z
CONTRIBUTOR
null
```python In [2]: pd.DatetimeIndex([1, 2], dtype=object()) Out[2]: DatetimeIndex(['1970-01-01 00:00:00.000000001', '1970-01-01 00:00:00.000000002'], dtype='datetime64[ns]', freq=None) ``` this should probably raise.
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bug fix: parameter name changed to use_threads in read_feather
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Bug: ```python >>> import pandas as pd >>> pd.read_feather('tmp/test') ... ``` ```bash in read_feather(path, nthreads) 110 return feather.read_dataframe(path) 111 --> 112 return feather.read_dataframe(path, nthreads=nthreads) TypeError: read_feather() got an unexpected keyword argument...
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23,988
BUG: maybe_infer_to_datetimelike incorrect on 2D inputs
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5
2018-11-29T00:09:39Z
2021-05-29T01:20:46Z
2021-05-29T01:20:46Z
MEMBER
null
Moved from discussion in #23730 ``` >>> ts = pd.Timestamp.now().tz_localize('US/Pacific') >>> data = np.array([[ts, ts, ts], [ts, ts, ts]]) >>> pd.DataFrame(data) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "pandas/core/frame.py", line 416, in __init__ copy=copy) Fil...
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23,989
CLN: remove unused import causing flake8 error on master
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2018-11-29T00:16:21Z
2018-11-29T00:30:30Z
2018-11-29T00:29:59Z
CONTRIBUTOR
null
Cleanup in #23971 removed the last use of the `copy` module, so `flake8` is now failing master due to an unused import. This fixes master by removing the import. - [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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REF/API: DatetimeTZDtype
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2018-11-29T03:12:23Z
2018-12-03T23:54:10Z
2018-12-03T23:54:05Z
CONTRIBUTOR
null
A cleanup of DatetimeTZDtype * Remove magic constructor from string. It seemed dangerous to overload `unit` with either `unit` or a full `datetime64[ns, tz]` string. This required changing `DatetimeTZDtype.construct_from_string` and changing a number of places to use `construct_from_string` rather than the main `__n...
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BUG/TST: PeriodArray.__setitem__ with slice and list-like value
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2018-11-29T10:23:27Z
2018-12-02T23:19:10Z
2018-12-02T23:19:01Z
MEMBER
null
- [ ] closes #23978 - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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step option does not work for hist
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2018-11-29T11:40:00Z
2020-11-01T06:31:43Z
2020-11-01T06:31:43Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python import matplotlib.pyplot as plt import pandas as pd import numpy as np N = 1000 df = pd.DataFrame({ 'a': np.random.randint(0, 2, N), 'b': np.random.random(N) }) plt.figure() df.groupby('a').hist(histtype='step', ax=plt.gca()) plt.legend()...
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23,993
ENH: Create a nlargest and nsmallest methods for pandas.core.groupby.DataFrameGroupBy objects
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2018-11-29T14:07:01Z
2019-10-20T23:25:55Z
2019-10-20T23:25:55Z
NONE
null
#### Code Sample, a copy-pastable example if possible Current method ```python import pandas as pd dataframe = pd.DataFrame({'col1': list('aaabbbcc'), 'col2': range(8), 'col3': list('whatever')}) dataframe.groupby('col1').apply(lambda df: df.nlargest(2, 'col2')) ``` Desired method ```python import pandas as ...
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DOC: work around IPython directive bug
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2018-11-29T15:30:32Z
2018-11-29T16:32:44Z
2018-11-29T16:32:40Z
CONTRIBUTOR
null
Closes https://github.com/pandas-dev/pandas/issues/23954
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Public Data Followups
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2018-11-29T16:07:50Z
2019-01-03T20:59:40Z
2019-01-03T20:59:40Z
CONTRIBUTOR
null
leftover from https://github.com/pandas-dev/pandas/pull/23623 1. Signature for `.to_numpy()`: @jorisvandenbossche proposed `copy=True`, which I think is good. Beyond that, we may want to control the "fidelity" of the conversion. Should `Series[datetime64[ns, tz]].to_numpy()` be an ndarray of Timestamp objets or an n...
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Dictionary of callables to df.style.format not behaving properly
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2018-11-30T16:50:33Z
2018-11-29T19:49:59Z
NONE
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#### Code Sample, a copy-pastable example if possible ```python import pandas as pd import numpy as np from tabulate import tabulate def render_cols(df, qdict, **kwargs): '''Used with pipe to add units to numbers through explicit string conversion''' df = df.copy() prec = kwargs.get('prec', 3) ...
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385,839,591
MDU6SXNzdWUzODU4Mzk1OTE=
23,997
read_csv 'NoneType' object has no attribute
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1
2018-11-29T17:13:54Z
2018-11-29T19:26:06Z
2018-11-29T19:25:56Z
NONE
null
Hi, so I created a csv file with the following code: df = pd.DataFrame(Listing_Data1, columns = Field1) df.to_csv('Listing_my.csv', sep=",", index = False) Everything looks right in the csv file. However, when I read the csv file using the following code: with open('Listing_my.csv',, 'r') as f: #, encoding="utf...
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385,844,255
MDU6SXNzdWUzODU4NDQyNTU=
23,998
to_sql return inserted row count or list
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4
2018-11-29T17:25:26Z
2021-06-23T05:00:42Z
null
NONE
null
Potential feature, could `df.to_sql()` return the indexes of the inserted rows? Something like [knex.js Query Builder](https://knexjs.org/#Builder-insert) ```python inserted = df.to_sql(con=engine, name=example_table, if_exists='replace', index=False) ``` #### Problem description This would allow for more quickl...
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23,999
BUG: pandas.cut should disallow overlapping IntervalIndex bins
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6
2018-11-29T18:41:06Z
2018-12-01T00:18:15Z
2018-12-01T00:17:14Z
MEMBER
null
- [ ] closes #23980 - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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24,000
REF: prelim for fixing array_to_datetime
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3
2018-11-29T20:07:57Z
2018-11-29T22:29:04Z
2018-11-29T22:01:14Z
MEMBER
null
`tslib.array_to_datetime` has an unused `format` kwarg. This gets rid of it. `to_datetime` (or more specifically, `_convert_listlike_datetimes`) has a bunch of boxing logic inside a try/except that doesn't need to be, obscures what Exception we're trying to catch. This moves that code outside the try/except and de...
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385,927,400
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24,001
DataFrame constructor with ndarray of Timestamp objects fails with AssertionError
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2
2018-11-29T21:10:25Z
2018-11-29T21:50:35Z
2018-11-29T21:50:35Z
CONTRIBUTOR
null
What're the expected dtypes here? object or datetimetz? ```python In [27]: arr = np.array([[pd.Timestamp('2000', tz='UTC')] * 2, [pd.Timestamp('2000', tz='UTC')] * 2]) In [28]: pd.DataFrame(arr, index=[0, 1]) --------------------------------------------------------------------------- AssertionError ...
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24,002
DOC: Fix PEP-8 issues in computation.rst and comparison_*.rst
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2018-11-29T22:54:02Z
2018-12-03T19:10:37Z
2018-12-02T17:22:24Z
CONTRIBUTOR
null
- Fix PEP-8 issues in comparison_*.rst - Fix PEP-8 issues in computation.rst
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24,003
Fix PEP-8 issues in contributing.rst
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2018-11-29T22:54:20Z
2018-12-03T19:09:36Z
2018-12-02T22:00:37Z
CONTRIBUTOR
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24,004
CLEAN: Removing outdated and unused CI files
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2018-11-29T23:26:55Z
2018-11-30T21:34:14Z
2018-11-30T21:34:12Z
MEMBER
null
Removing outdated and unused files. - `ci/print_versions.py` doesn't work, as the used path has changed. It's not used anywhere in the code, and when needed, `python -c "import pandas; pandas.show_versions();"` is used instead. - `ci/README.txt` it's outdated and incomplete. After updating the CI and making it more c...
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24,005
API: fix str-accessor on CategoricalIndex
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2018-11-29T23:37:46Z
2018-12-02T23:14:26Z
2018-12-02T23:06:09Z
CONTRIBUTOR
null
closes #23555 closes #23556 split off from #23167 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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24,006
WIP: multi-timezone handling for array_to_datetime
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2018-11-29T23:52:59Z
2020-04-05T17:42:58Z
2019-04-22T15:42:17Z
MEMBER
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cc @mroeschke ATM `array_to_datetime` handles strings and datetime objects very differently, with `conversion.datetime_to_datetime64` picking up (some of) the slack. This unifies the treatment of strings/datetimes within array_to_datetime, rendering `conversion_to_datetime64` (and some ugly try/excepts in `pd.to_d...
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385,993,448
MDU6SXNzdWUzODU5OTM0NDg=
24,007
str.split expand by row
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2018-11-30T01:03:46Z
2018-11-30T15:08:15Z
null
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#### Problem description Currently, setting expand=True in str.split just creates new columns. While there is a solution [here](https://stackoverflow.com/questions/47571618/how-to-split-expand-a-string-value-into-several-pandas-dataframe-rows) to expand row-wise, it would be much more convenient if we could specify ...
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386,042,635
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24,008
PERF: optimize NaT lookups in cython modules
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2018-11-30T05:24:15Z
2018-12-02T23:10:25Z
2018-12-02T23:06:55Z
MEMBER
null
By making `NaT` a cdef'd object that we can cimport, we take a module-level lookup out of each check of `if obj is NaT`. Since we tend to do this check a lot, avoiding these global lookups can get us some mileage: ``` In [3]: vals = np.array([pd.NaT for _ in range(10**6)]) In [4]: %timeit pd.to_datetime(vals) ``...
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REF: Convert test_hashing to pytest idiom
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24,010
Clarify behavior pd.Period and pd.PeriodIndex when using timestamp information
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2018-11-30T08:26:31Z
2020-04-01T04:02:51Z
null
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#### Code Sample, a copy-pastable example if possible ```python index = pd.date_range("2001-01-01-08:00:00", freq="B", periods=10) DatetimeIndex(['2001-01-01 08:00:00', '2001-01-02 08:00:00', '2001-01-03 08:00:00', '2001-01-04 08:00:00', '2001-01-05 08:00:00', '2001-01-08 08:00:00',...
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24,011
Rich comparisons of Timestamps raise TypeError instead of returning NotImplemented
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2018-11-30T10:50:40Z
2019-04-05T00:40:47Z
2019-04-05T00:40:47Z
CONTRIBUTOR
null
Hello, #### Problem description The problem is that pandas' ``Timestamp`` raises ``TypeError`` when compared with unsupported types (from pandas' point of view), where I think it should return ``NotImplemented`` so that comparisons are delegated to the other object (if supported). See https://github.com/pandas-de...
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