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19,910
BUG: fix to_latex() when using MultiIndex with NaN in (#14249)
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11
2018-02-26T16:26:23Z
2018-04-23T16:01:45Z
2018-04-23T16:01:45Z
CONTRIBUTOR
null
- [x] closes #14249 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry This attempt to close #14249 which actually reports two related issues (one in the issue one in the SO link) with to_latex() with MultiIndex when the MultiIndex contains a NaN. ...
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19,911
Xlsxwriter, Py27 and Linux Failure on to_excel with Timedelta
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2018-02-26T16:27:54Z
2018-02-28T00:52:44Z
2018-02-28T00:16:49Z
MEMBER
null
See [this comment](https://github.com/pandas-dev/pandas/pull/19829#pullrequestreview-99172569) in #19829. The test to write Timedelta data to an excel file is failing only with the combination of xlsxwriter as the engine using Py27 and on Linux. All other engines (save openpyxl which has an issue referenced in #19900),...
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19,912
Datetimelike add/sub catch cases more explicitly, tests
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2018-02-26T16:49:24Z
2018-06-22T03:31:34Z
2018-03-06T12:27:22Z
MEMBER
null
Align some of the dispatching logic between that is currently special-cased by PeriodIndex. Should avoid overlap with #19903. Catch some currently-implicit cases explicitly.
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19,913
API: Added ExtensionArray constructors
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2018-02-26T18:03:54Z
2018-05-02T13:10:20Z
2018-03-02T21:20:29Z
CONTRIBUTOR
null
Adds two new (private, but part of the interface) constructors to EA. Closes #19906
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19,914
BUG: Adding skipna as an option to groupby cumsum and cumprod
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2018-02-26T19:11:45Z
2018-03-01T23:14:01Z
2018-03-01T23:13:58Z
CONTRIBUTOR
null
- [x] closes #19806 - [x] tests added in `test_groupby.py` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry This handles #19806 by adding skipna as an option to both `cumsum` and `cumprod` after groupby. I'm assuming that default behavior is what is described in the docs, ...
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19,915
DOC fix incorrect example in DataFrame.to_dict docstring. Close GH19868
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2018-02-26T19:34:50Z
2018-02-27T01:48:43Z
2018-02-27T01:24:58Z
CONTRIBUTOR
null
- [x] closes #19868 - [ ] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] What's new: Fix incorrect example
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19,916
Accessor behavior variances with multiindex
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NONE
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#### Code Sample, a copy-pastable example if possible ```python def gen(): yield '1','2',1,2 yield '1','2',1,2 yield '1','3',3,2 yield '2','4',1,2 ser = pd.DataFrame(gen(), columns=["a", "b", "c", "d",]).set_index(["a", "b"])["c"] print ser print ser.loc[('1','3')] print ser.at[('1','3')...
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Styler extremely slow
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#### Code Sample ```python def highlighter(col): ''' Highlights rows in `highlight_map` keys where df[`highlight map` values]==1 ''' highlight_map = { 'Service Type': 'ServiceType_Added', 'Store #': 'Store_Added', } if col.name in highlight_map: return ['ba...
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transition period_helper to use pandas_datetimestruct
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In the last round we transitioned period.pyx to use pandas_datetimestruct instead of date_info. This does the same thing for period_helper.
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Cythonized GroupBy pct_change
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2018-02-26T22:41:17Z
2018-03-21T23:45:07Z
2018-03-10T02:06:44Z
MEMBER
null
- [ ] progress towards #19165 - [X] tests added / passed - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [X] whatsnew entry This seemed like a logical follow up to #19673. ASV benchmarks below: ```bash before after ratio [1e4c50a5] [c8285b5c] + ...
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BUG: DataFrame.astype(dict) can cause column metadata to be lost
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2018-02-27T01:20:14Z
2018-03-01T11:14:20Z
2018-03-01T11:14:20Z
MEMBER
null
#### Code Sample, a copy-pastable example if possible Setup: ```python In [2]: df = pd.DataFrame(data=np.random.randint(5, size=(3, 4)), ...: columns=pd.UInt64Index(range(500, 504), name='foo')) ...: In [3]: df Out[3]: foo 500 501 502 503 0 4 4 2 1 1 0 2 ...
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19,921
Consistent Timedelta Writing for all Excel Engines
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2018-02-27T01:30:24Z
2018-05-14T21:11:43Z
2018-02-28T00:16:49Z
MEMBER
null
- [X] closes #19900 - [X] tests added / passed - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [X] whatsnew entry I've basically copied the implementation that was done for the `XlwtWriter` class in #19244 over to the other engine subclasses for an easy fix. This might also fix #19911
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offsets/liboffsets cleanup
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2018-02-27T01:42:56Z
2018-06-22T03:31:16Z
2018-03-01T15:56:09Z
MEMBER
null
working on making DateOffset immutable enough unrelated changes added up to merit separating them out into this PR. No logic is affected.
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DOC: fixes pipe example in basics.rst due to statsmodel changes
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2018-02-27T03:04:00Z
2018-02-28T08:14:35Z
2018-02-28T08:14:24Z
CONTRIBUTOR
null
To work around changes in statsmodel api. - [ ] closes #19713 - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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CI: Failing test on master
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2018-02-27T13:26:24Z
2018-02-27T21:31:56Z
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CONTRIBUTOR
null
Seeing this on several PRs ``` ___________________ TestTSPlot.test_mixed_freq_regular_first ___________________ [gw0] darwin -- Python 3.5.4 /Users/travis/miniconda3/envs/pandas/bin/python self = <pandas.tests.plotting.test_datetimelike.TestTSPlot object at 0x10d3538d0> def test_mixed_freq_regular_first(self...
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TST: Debug flaky plotting test
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2018-02-27T15:47:51Z
2018-05-02T13:10:22Z
2018-02-27T21:31:56Z
CONTRIBUTOR
null
Maybe closes https://github.com/pandas-dev/pandas/issues/19924. I can't reproduce this locally so who knows. A while back I went through and added `plt.subplots()` and explicit `ax=ax` to a bunch of the plotting tests. I apparently missed this one. It seemed to help, but they're flaky tests so who knows. Also ch...
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Added seek to buffer to fix xlwt asv failure
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2018-02-27T16:01:35Z
2018-02-28T00:54:52Z
2018-02-27T21:28:23Z
MEMBER
null
- [X] closes #19779 - [X] tests added / passed - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry Sample ASV results from this as follows. Across 5 runs I got the upstream/master error every time and none on HEAD ```bash (pandas_dev) williams-imac:asv_bench williamayd$...
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Add documentation to pandas.core.groupby.GroupBy.apply
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2018-02-27T19:50:18Z
2018-07-10T11:24:39Z
2018-07-10T11:24:38Z
NONE
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It took me a few hours to figure out how to edit rows from `groupBy` objects until I scavenged the code.
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Add CodeTriage badge to pandas-dev/pandas
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2018-02-27T20:41:15Z
2018-02-28T11:07:32Z
2018-02-28T11:07:28Z
CONTRIBUTOR
null
Adds a badge showing the number of people helping this repo on CodeTriage. [![Open Source Helpers](https://www.codetriage.com/pandas-dev/pandas/badges/users.svg)](https://www.codetriage.com/pandas-dev/pandas) ## What is CodeTriage? CodeTriage is an Open Source app that is designed to make contributing to Open Sourc...
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CI: Migrate to circle CI 2.0
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2018-02-27T21:04:42Z
2018-08-17T11:20:51Z
2018-08-17T11:20:51Z
CONTRIBUTOR
null
1.0 is being shut down: https://circleci.com/blog/sunsetting-1-0/?mkt_tok=eyJpIjoiT0dFMVkyWXlZV05pT1RFNSIsInQiOiJrWVJVc0lUSjZ3NSttZHJDM2h2UFhoY0JacGw4YUNwR09qb1QwZzRFM2NOKzk4WEI5VXhxS055S2JPbVdFUWdmbWVPWmx5R0N1TFB6ZEFsZm5JUklob1dXTXAzZWtCaWpYSmE0TUdSd3RRemh3WWYxMDhleHhtVkh0dU9obStGRiJ9 - http://go.circleci.com/E020Z...
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DOC: fix Series.reset_index example
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2018-02-27T21:12:59Z
2018-02-28T08:06:11Z
2018-02-28T08:05:56Z
CONTRIBUTOR
null
- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry Show correct values in idx column.
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Pandas complains about an already opened file, even when the file has been closed.
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2018-02-27T21:54:02Z
2018-02-28T02:44:49Z
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CONTRIBUTOR
null
```python import pandas as pd class Foo(): def __init__(self): self.tt = pd.HDFStore('<filename>.hdf', mode = 'a') self.tt.close() self.tt = pd.HDFStore('<filename>.hdf', mode='r') Foo() ``` This throws a ValueError: ``` ValueError: The file '<filename>.hdf' is already opene...
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DOC: general discussion of our docstring sharing system
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2018-02-27T23:15:21Z
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MEMBER
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Currently in many places we write docstrings as string values inside a `_shared_docs` dictionary, and then add this docstring to the method with a decorator like `@Appender(_shared_docs['where'])`, or possibly with substitution of variables in the template docstring with `@Appender(_shared_docs['where'] % _shared_doc_k...
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Adding sample datasets to be used in the documentation
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2018-02-28T00:03:46Z
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MEMBER
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- [X] closes #19710 - [ ] tests added / passed - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [X] whatsnew entry
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Add doctest flags to setup.cfg
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2018-02-28T02:40:54Z
2018-08-20T06:48:57Z
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CONTRIBUTOR
null
pytest let's you add common doctest settings to the `setup.cfg`. I think we should add ``` doctest_optionflags= NORMALIZE_WHITESPACE ``` Any reason not to do this? Any others we should add?
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pd.to_datetime('today') and pd.Timestamp('today') return different results
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2018-03-01T23:02:32Z
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NONE
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#### Code Sample, a copy-pastable example if possible ```python pd.Timestamp('today') pd.to_datetime('today') ``` #### Problem description pd.to_datetime('today') returns a floored timestamp and pd.Timestamp('today') doesn't ``` In [13]: pd.Timestamp('now') Out[13]: Timestamp('2018-02-28 09:43:20.060...
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DOC: add doc on ExtensionArray and extending pandas
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2018-02-28T13:00:28Z
2018-05-02T13:10:21Z
2018-03-06T15:38:33Z
CONTRIBUTOR
null
- Added a new page on extending pandas - Added some prose on extension arrays / extension dtypes - Moved subclassing there - Added a section to ecosystem.rst about libraries providing extension types and accessors.
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Making to_datetime('today') and Timestamp('today') consistent
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2
2018-02-28T15:09:56Z
2018-03-01T23:02:35Z
2018-03-01T23:02:32Z
CONTRIBUTOR
null
This PR changes `pd.to_datetime` to be consistent with `Timestamp('today')`. - [x] closes #19935 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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19,938
REF/BUG/API: factorizing categorical data
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10
2018-02-28T15:19:15Z
2018-05-02T13:10:14Z
2018-03-15T10:40:59Z
CONTRIBUTOR
null
This changes / fixes how Categorical data are factorized. The return value of a factorized categorical is now `Tuple[ndarray[int], Categorical]`. Before ```python In [2]: l, u = pd.factorize(pd.Categorical(['a', 'a', 'b'])) In [3]: l Out[3]: array([0, 0, 1]) In [4]: u Out[4]: array([0, 1]) ``` after...
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19,939
Pickled TimedeltaIndex from 0.19.2 cannot be unpickled in 0.20+ using pd.read_pickle
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2018-02-28T16:48:22Z
2018-03-04T19:58:23Z
2018-03-04T19:58:23Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python # On pandas 0.19.2, python 2.7 import pandas as pd import cPickle as pickle td30 = pd.timedelta_range('00:30:00', '01:30:00', freq='30T') td30.to_series().to_pickle('C:/temp/td30.pkl') pd.read_pickle('c:/temp/td30.pkl') Out[7]: 00...
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19,940
Behavior of pivot table labeling is inconsistent between list and tuple for aggfunc
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2018-02-28T17:40:48Z
2021-06-19T05:57:53Z
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#### Code Sample, a copy-pastable example if possible ```python def entropy(x): return 1 # dummy func vamp = pd.DataFrame({ 'vampire': tuple('nnyyynnn'), 'shadow': tuple('?y?n?yy?'), 'garlic': tuple('yynnnnny'), 'complexion': tuple('prraapar'), 'accent': tuple('nnnhoh...
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19,941
Read_csv leaks memory when used in multiple threads
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2018-02-28T19:47:36Z
2021-06-19T05:58:32Z
null
CONTRIBUTOR
null
When using `read_csv` in threads it appears that the Python process leaks a little memory. This is coming from this dask-focused stack overflow question: https://stackoverflow.com/questions/48954080/why-is-dask-read-csv-from-s3-keeping-so-much-memory I've reduced it to a problem with `pandas.read_csv` and a `conc...
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19,942
DOC: Freeze old whatsnew notes?
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2018-02-28T22:56:28Z
2018-03-01T08:59:30Z
2018-03-01T08:59:26Z
CONTRIBUTOR
null
Currently on master, we have a new failure from the `0.10.0.txt` whatsnew due to the `line_width` option being removed. Rather than continuing to fix these old examples due to backwards comparability breaks in pandas, could we convert the old `..ipython:: python` blocks to regular `.. code-block:: python` examples s...
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BUG: Compat for pre-0.20 TimedeltaIndex and Float64Index pickles #19939
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2018-03-01T00:36:35Z
2018-03-05T19:46:46Z
2018-03-04T19:58:23Z
CONTRIBUTOR
null
- [x] closes #19939 - [x] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry Added pre-0.20 locations of TimedeltaIndex and Float64Index to pickle_compat.py.
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19,944
deprecation warning importing pandas (python2.7 only)
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2018-09-18T11:15:25Z
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#### Code Sample: ``` $mkvirtualenv pandas-deprecation-repro --python=python2.7 $workon pandas-deprecation-repro $pip install pandas $PYTHONWARNINGS=error::FutureWarning python -c "import pandas" Traceback (most recent call last): File "<string>", line 1, in <module> File "/Users/davidchudzicki/.virtual...
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DOC: Add comparison with Stata page to documentation
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2018-03-01T05:10:48Z
2018-03-29T14:39:14Z
2018-03-29T14:39:09Z
CONTRIBUTOR
null
- [ ] closes ##### - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry I noticed that the pandas documentation has pages for [Comparison with SAS](https://pandas.pydata.org/pandas-docs/stable/comparison_with_sas.html), [Comparison with R](https://pa...
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19,946
pandas.DataFrame.apply function calls func twice on the first column/row
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2018-07-09T00:52:57Z
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#### Code Sample, a copy-pastable example if possible ```python addDf.apply(lambda x:addCredit(x['content_name'],x['content_value'],x['credit'],userCreditSession,creditAction,queryDate,creditReason,creditType),axis=1) ``` #### Problem description In my code ,I want to use apply to add credit for some credit obje...
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301,317,381
MDExOlB1bGxSZXF1ZXN0MTcyMTcxNjgy
19,947
CLN: remove redundant clean_fill_method calls
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2018-03-01T08:32:07Z
2018-03-01T11:12:39Z
2018-03-01T11:12:36Z
MEMBER
null
The ` method = missing.clean_fill_method(method)` is already called in `value, method = validate_fillna_kwargs(value, method)`
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19,948
BUG: Preserve column metadata with DataFrame.astype
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2018-03-01T08:40:54Z
2018-03-01T16:15:02Z
2018-03-01T11:14:20Z
MEMBER
null
- [X] closes #19920 - [X] tests added / passed - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [X] whatsnew entry Follow-up to #18099
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19,949
DOC: remove empty attribute/method lists from class docstrings html page
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2018-03-01T10:06:01Z
2018-03-01T21:48:52Z
2018-03-01T21:48:39Z
MEMBER
null
Follow-up on https://github.com/pandas-dev/pandas/pull/18202 (RangeIndex was forgotten) This is not really ideal, as we then get warnings about None not being a method. Maybe we could somehow connect with the numpydoc process and after its processing remove it ..
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19,950
Add method to flatten all multi-index levels
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2018-03-01T10:36:30Z
2019-12-30T16:16:39Z
2018-11-13T16:57:19Z
CONTRIBUTOR
null
Sometimes it is useful to flatten all levels of a multi-index. For example, when pivoting data into a wide format, the new columns are generally multi-indexed. However, when exporting to CSV, sometimes it might be desirable to have only one header row. AFAIK, there is no dedicated method to flatten an existing multi...
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301,394,783
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19,951
DOC: small updates to make.py script
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2018-03-01T12:57:37Z
2018-03-02T21:35:52Z
2018-03-02T21:35:46Z
MEMBER
null
- alias `python make.py --single api` to `api.rst` (like is done for the other .rst pages) - pass through verbose flag to sphinx
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19,952
DOC/CI: run doctests on travis
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2018-03-01T13:48:26Z
2018-08-17T07:20:15Z
2018-08-17T07:20:12Z
MEMBER
null
Trying to see if we can check the doctests on travis. We were already running them, but at this point they were not failing travis if they failed. Closes https://github.com/pandas-dev/pandas/issues/19934 Closes https://github.com/pandas-dev/pandas/issues/3439
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19,953
rolling.apply deprecated in the future series rolling sugjested but doesn't work
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2018-03-01T15:23:59Z
2018-03-01T16:42:01Z
2018-03-01T16:19:31Z
NONE
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#### Code Sample, ```python #series example then old example that threw the future warning commented out housing_data['ma_apply_example'] = Series.rolling(window=10,center=False).apply(housing_data['M30'], moving_average) #housing_data['ma_apply_example'] = pd.rolling_apply(housing_data['M30'], 125, moving_aver...
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19,954
.values on ExtensionArray-backed containers
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2018-03-01T17:23:04Z
2018-11-29T15:53:22Z
2018-11-29T15:53:22Z
CONTRIBUTOR
null
Discussed briefly on the call today, but we should go through things formally. What should the return type of `Series[extension_array].values` and `Index[extension_array].values` be? I believe the two options are 1. Return the ExtensionArray backing it (e.g. like what Categorical does) 2. Return an ndarray with ...
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19,955
Resolved
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2018-03-01T17:58:08Z
2018-03-01T18:41:09Z
2018-03-01T18:12:33Z
NONE
null
#### Output of ``pd.show_versions()`` <details> [paste the output of ``pd.show_versions()`` here below this line] </details>
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PeriodIndex.ravel returns ndarray[int64]
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2018-03-01T19:05:48Z
2021-10-29T19:09:04Z
null
MEMBER
null
This came up while trying to de-duplicate some DataFrame vs Series arithmetic logic in core.ops.
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19,957
ENH: Sorting of ExtensionArrays
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2018-03-01T20:48:41Z
2018-03-23T12:43:22Z
2018-03-22T23:20:06Z
CONTRIBUTOR
null
This enables {Series,DataFrame}.sort_values and {Series,DataFrame}.argsort. These are required for `factorize`, which is required for `groupby` (my end goal). I haven't implemented `ExtensionArray.sort_values` yet because it hasn't become necessary. But I can if needed / desired.
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Concat slow when frames indexed separately
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2018-03-01T21:38:33Z
2018-07-25T09:54:55Z
null
NONE
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#### Code Sample, a copy-pastable example if possible ```python frames_difindex = [] frames_sameindex = [] for i in range(1000): # Create a single-row frame where half the elements are null a = np.random.rand(600) - 0.5 a[a<0] = np.nan # All rows here have the same column index f = pd.DataFrame...
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Implement integer array add/sub for datetimelike indexes
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2018-03-02T05:55:58Z
2018-05-29T03:47:37Z
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MEMBER
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AFAICT this is the next-to-last non-raising case for these operations. After this is just object-dtype, and for that we already have the correct implementation in addsub_offset_array, just need to make the condition less strict and add appropriate tests. - [ ] closes #xxxx - [x] tests added / passed - [x] passes ...
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DOC: update docstring validation script
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2018-03-02T21:18:24Z
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MEMBER
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Follow-up on https://github.com/pandas-dev/pandas/pull/19898 cc @datapythonista
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19,961
np.int64 in pandas dataframes is not instance of np.int64
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2018-03-02T10:42:53Z
2018-03-02T11:01:10Z
2018-03-02T11:01:10Z
NONE
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#### Code Sample, a copy-pastable example if possible ```python import pandas as pd x = np.int64(4) print("input isinstance np.int64 ",isinstance(x, np.int64)) print( "input type:", type(x)) df = pd.DataFrame.from_dict({0: {'int64':x}}, orient='index') print('output') print("dataframe isinstance np.int64...
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DOC: fix some sphinx syntax warnings
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Classes should maintain a registry of accessors
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2018-03-02T12:25:39Z
2018-04-23T12:49:43Z
2018-04-23T12:49:43Z
CONTRIBUTOR
null
Dask would like to inherit the accessors registered by `register_*_acessor`. This would be much easier if the `regiser_*_accessor` methods added the name of the accessor to a (private) class variable. It seems like we have use of it in pandas as well: https://github.com/pandas-dev/pandas/pull/19960/files#r171815351
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DOC: clarify version of ActivePython that includes pandas
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MEMBER
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Follow-up on https://github.com/pandas-dev/pandas/pull/19908 cc @jreback
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Missing labels with Timedelta on x-axis
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2020-05-20T10:13:23Z
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#### Code Sample, a copy-pastable example if possible Please see the entire sample [in this Gist](https://gist.github.com/Pastafarianist/e61f9ace6dfe849072c7bd45a546e640). Here I'm only copying the code and the output (no data). ```python import pandas as pd import matplotlib.pyplot as plt df = pd.read_csv('...
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MDU6SXNzdWUzMDE3ODU0ODA=
19,966
MultiIndexed unstack with tuple names fails with KeyError
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3
2018-03-02T14:33:58Z
2020-01-20T23:15:14Z
2020-01-20T23:15:14Z
CONTRIBUTOR
null
```python In [8]: idx = pd.MultiIndex.from_product([['a', 'b', 'c'], [1, 2, 3]], names=[('A', 'a'), ('B', 'b')]) In [9]: s = pd.Series(1, index=idx) In [10]: s Out[10]: (A, a) (B, b) a 1 1 2 1 3 1 b 1 1 2 1 3 1 ...
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MDU6SXNzdWUzMDE4MzA0NjE=
19,967
Cannot serialize objects with IntervalIndex using msgpack
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2018-03-02T16:44:59Z
2018-03-07T18:04:24Z
2018-03-07T18:04:24Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible From ```python import numpy as np import pandas as pd ser = pd.Series(np.arange(10), pd.interval_range(0, periods=10)) ser.to_msgpack('C:/temp/blah.mpk') --> TypeError Traceback (most recent call last) <ipython-input-8-0da...
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19,968
DOC: Some doc cleanup
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2
2018-03-02T16:52:44Z
2018-05-18T18:09:09Z
2018-05-18T18:09:09Z
CONTRIBUTOR
null
Some minor stuff regarding ``.ix`` and ``.loc``. 1: The [README](https://github.com/pandas-dev/pandas) has a link about ``DataFrame.ix``. As ``ix`` is deprecated, the link is changed to [selection-by-label](https://pandas.pydata.org/pandas-docs/stable/indexing.html#selection-by-label). 2: In [selection-by-label...
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19,969
multiple value inside a cell in a csv file
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2018-03-02T16:59:42Z
2021-06-19T06:02:14Z
2021-06-19T06:02:14Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python # Your code here ``` #### Problem description Hello I am new to python pandas and i am having a problem figuring out how i can merge multiple values inside a single cell into a one line. Incorrect: 1644107,"Delete stub zones map.com map.net"...
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19,970
KeyError when comparing DataFrame with tz-aware DatetimeIndex on columns with DST change
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2018-03-02T18:06:35Z
2018-06-13T10:51:43Z
2018-06-13T10:51:43Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python dr = pd.date_range('20160101', '20161130', freq='4H', tz='America/New_York') df = pd.DataFrame({'a':np.arange(len(dr)), 'b':np.arange(len(dr))}, index=dr) dfnov_view = df.loc['2016-11'] drnov = pd.date_range('20161101', '20161130', freq='4H', tz='Am...
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19,971
Sparse Frame ops - can we just use align?
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2018-03-02T18:56:05Z
2018-07-14T01:02:49Z
2018-07-14T01:02:49Z
MEMBER
null
Working on de-specializing the SparseDataFrame implementations of a few methods, some of the alignment logic looks like it may be unnecessarily verbose, but I'd like a second opinion (and a first well-informed opinion) The relevant lines from the DataFrame methods: ``` def _combine_match_columns(self, other, func,...
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19,972
Small ops cleanups
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2018-03-02T19:45:30Z
2018-06-22T03:32:10Z
2018-03-07T14:19:22Z
MEMBER
null
Consistently use `op_name` and `res_name` and avoid `name` Use find_common_type instead of np.find_common_type, moving towards de-duping Series/Frame code.
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19,973
fix: scalar timestamp assignment (#19843)
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2018-03-02T20:36:25Z
2018-08-02T17:27:23Z
2018-08-02T17:27:23Z
CONTRIBUTOR
null
- [x] closes #19843 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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19,974
min_count is ignored by sum/prod when resampling a PeriodIndex
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2018-03-02T20:51:22Z
2020-01-24T19:04:55Z
2020-01-24T19:04:55Z
NONE
null
#### Code Sample Setup: ```python import numpy as np import pandas as pd ​ index = pd.date_range(start='2018', freq='M', periods=6) data = np.ones(6) data[3:6] = np.nan datetime = pd.Series(data, index) period = datetime.to_period() ``` Resampling and summing (`min_count=1`) the Series with a DatetimeIn...
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BUG: Fixes to msgpack support.
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2018-03-02T21:27:20Z
2018-03-07T18:04:25Z
2018-03-07T18:04:24Z
CONTRIBUTOR
null
Adds support for IntervalIndex and Interval; fixes Period and TimedeltaIndex. Closes #19967 and #13463. - [ ] closes #19967 - [ ] closes #13463 - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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CI: NumPy logical reductions (any, all) fail on DataFrame with NumPy master
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2018-06-26T07:34:16Z
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CONTRIBUTOR
null
https://travis-ci.org/pandas-dev/pandas/jobs/348215410#L2717 ``` [gw1] linux -- Python 3.6.4 /home/travis/miniconda3/envs/pandas/bin/python self = <pandas.tests.frame.test_analytics.TestDataFrameAnalytics object at 0x7f86fa5d54a8> axis = 0 @pytest.mark.parametrize("axis", [0, 1, None]) def test_clip_aga...
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BUG: DataFrame.loc[*, label] fails with IntervalIndex
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MEMBER
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#### Code Sample, a copy-pastable example if possible Setup: ```python In [2]: ii = pd.interval_range(0, 4) In [3]: df = pd.DataFrame(np.arange(12).reshape(4, 3), index=ii, columns=list('ABC')) In [4]: df Out[4]: A B C (0, 1] 0 1 2 (1, 2] 3 4 5 (2, 3] 6 7 8 (3, 4] 9 10 11 `...
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API: Allow dictionary argument in rename_axis to change some names of MultiIndex
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2018-03-02T23:08:52Z
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CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python mi = pd.MultiIndex.from_product([['a','b','c'],[1,2]], names=['ll','nn']) df = pd.DataFrame({'x': [i for i in range(len(mi))], 'y' : [i*10 for i in range(len(mi))]}, index=mi) df.rename(columns={'x':'z'}) # This works to change name of one column d...
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ENH: Parse %z and %Z directive in format for to_datetime
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2018-03-03T04:49:33Z
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MEMBER
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- [x] closes #13486 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry The implimentiontion is near identical to https://github.com/python/cpython/blob/master/Lib/_strptime.py an currently works as `datetime.strptime` would: ``` In [3]: f = '%Y...
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CLN: deprecate the pandas.tseries.plotting.tsplot function (GH18627)
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2018-03-04T02:35:22Z
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CONTRIBUTOR
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- [X] closes #18627 - [X] tests added / passed - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [X] whatsnew entry
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to_latex() errors if index level name is not string
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MEMBER
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#### Code Sample, a copy-pastable example if possible ```python In [2]: pd.DataFrame([[1, 2, 3]]*2).set_index([0, 1]).to_latex() --------------------------------------------------------------------------- AttributeError Traceback (most recent call last) <ipython-input-2-22b8b94dc46c> i...
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DOC: Improved the docstring of Series.str.findall
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2018-03-04T14:52:40Z
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CONTRIBUTOR
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Docstring assigned to PyData Mallorca in Pandas Documentation Sprint (https://python-sprints.github.io/pandas/). Please, any indication to improve our PR will be appreciated! Happy to contribute :-)
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DOC: Update is_sparse docstring
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CONTRIBUTOR
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`is_sparse(pd.SparseDataFrame([1,2,3]))` returns `False`. The is_sparse function checks to see if an array-like is spare by checking to see if it is an instance of ABCSparseArray or ABCSparseSeries. This commit adds ABCSparseDataFrame to that list -- so it can detect that a DataFrame (which is an array-like ob...
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19,984
BLD: wheel building is now failing
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2018-03-04T16:03:03Z
2018-04-14T14:36:01Z
2018-04-14T14:36:01Z
CONTRIBUTOR
null
start 3 days ago: https://travis-ci.org/MacPython/pandas-wheels/builds/348053404 I think something is showing a ``UserWarning`` that didn't before. like between master and: 52559f535788b3c59c6c78d2cf987b03303b16f6
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19,985
DOC: Improve docstring for pandas.Index.repeat
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2018-03-04T21:04:26Z
2018-03-09T09:36:58Z
2018-03-09T08:20:00Z
CONTRIBUTOR
null
String assigned to ChiPy (Chicago Python Users Group) chapter of the Worldwide Documentation Sprint While `Index.repeat` does accept `args` and `kwargs`, it does not pass them through to the underlying `numpy` function. The only additional parameter the numpy function takes is `axis` ([numpy docs](https://docs.sc...
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19,986
DOC: is confusing for ddof parameter of sem, var and std functions
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1
2018-03-04T22:03:37Z
2018-03-07T19:54:00Z
2018-03-06T21:47:46Z
CONTRIBUTOR
null
Closes #18903
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19,987
fixed pytest deprecation warning
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2018-03-04T23:52:12Z
2018-03-05T11:35:04Z
2018-03-05T11:35:00Z
CONTRIBUTOR
null
- closes #19703 fixed pytest deprecation warning
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19,988
Shared Benchmark suite for Pandas-like projects
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2018-03-05T02:45:11Z
2020-04-03T03:53:04Z
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CONTRIBUTOR
null
It would be valuable to have a benchmark suite for Pandas-like projects. This would help users reasonably compare the performance tradeoffs of different implementations and help developers identify possible performance issues. There are, I think, a few axes that such a benchmark suite might engage: 1. Operation...
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19,989
CLN: Python comprehensions and generators cleanup followup
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2018-03-05T06:18:05Z
2018-03-05T17:32:18Z
2018-03-05T11:23:49Z
MEMBER
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xref #18276, #18383 - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` Some multiline comprehensions and cleanups I missed in the two passes xref'd above.
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19,990
DOC: update contributing guide regarding updating a pull request (merge master)
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2018-03-05T10:26:36Z
2018-03-16T12:55:21Z
2018-03-16T12:55:18Z
MEMBER
null
Closes https://github.com/pandas-dev/pandas/issues/19412 Reference discussion: https://mail.python.org/pipermail/pandas-dev/2017-November/000632.html cc @datapythonista
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CLN/DOC: cache_readonly: remove allow_setting + preserve docstring
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2018-03-05T10:58:42Z
2018-03-06T21:42:45Z
2018-03-06T21:42:42Z
MEMBER
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Closes https://github.com/pandas-dev/pandas/issues/18197 This kind of 'works' in that `?` or `__doc__` now give the correct docstring, but it's not yet fully ideal as it is now seen as a class (which will probably mess up sphinx' autodoc/autosummary, which I didn't check yet)
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19,992
BUG: clip with a list-like threshold with a nan is broken
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2018-03-05T11:17:16Z
2018-08-02T10:06:42Z
2018-08-02T10:06:42Z
CONTRIBUTOR
null
xref #19976 ``.clip`` is basically a single or double signed where, where there is a ``nan`` present we just drop the bound entirely which is not correct. A fix for this would also fix #19976. So [31] should yield [30], however for scalars we ignore the nans, so maybe could do that here. ``` In [26]: s = pd.Series...
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DataFrame.from_dict multilevel dicts with datetime.date objects as keys sets the values as NaN in the DataFrame
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2018-03-05T13:11:39Z
2021-06-19T06:05:08Z
null
NONE
null
#### Code Sample, from Jupyter notebook ```python import pandas as pd import datetime example_multilevel_dict = { (0, datetime.date(2018, 3, 3)): {'A': 5, 'B': 1344, 'C': 0, 'D': 48, 'E': 20}, (0, datetime.date(2018, 3, 4)): {'A': 5, 'B': 1344, 'C': 0, 'D': 48, 'E': 20}, (1, datetime.date(2018, 3, 3)):...
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302,327,947
MDExOlB1bGxSZXF1ZXN0MTcyODg3Njk2
19,994
DOC: require returns section in validation script
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2018-03-05T14:48:57Z
2018-03-08T13:09:16Z
2018-03-08T13:09:13Z
MEMBER
null
Are there cases where do not want a "Returns" section? cc @datapythonista
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19,995
Shifting a datetime column with timezone after groupby loses the timezone.
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2018-03-05T15:39:59Z
2019-09-09T12:06:01Z
2019-09-09T12:06:01Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python weeks = pd.Series(pd.date_range('2018-01', '2018-02', freq='7D', tz='America/New_York')) week_ago = weeks.groupby([1, 1, 1, 1, 1]).shift() print(week_ago) ``` Outputs: ``` 0 NaT 1 2018-01-01 05:00:00 2 2018-01-08 05:00:00 ...
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19,996
DOC: updating docstring of Index.shift
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7
2018-03-05T16:35:48Z
2018-03-07T14:09:43Z
2018-03-07T13:56:49Z
CONTRIBUTOR
null
Docstring assigned to PyData Budapest chapter of the Worldwide Documentation Sprint. As Index.shift is an abstract method, this is more of a docstring for developers implementing a subclass than for end users.
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19,997
RangeIndex is converted to Int64Index on save to HDF5 (to_hdf)
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2018-03-05T17:17:46Z
2018-03-05T18:37:40Z
2018-03-05T18:37:16Z
CONTRIBUTOR
null
Hello, I'm not sure if it is an intended behavior or not, and I did not find any mention about this in the documentation or in the github issue tracker. I'm filing it - just in case it was not planned to work this way. #### Problem description On save to HDF5 file `RangeIndex` of pandas.DataFrame is converted to ...
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19,998
Series replace, unexpected fill behavior
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4
2018-03-05T18:07:00Z
2021-06-19T06:06:36Z
null
NONE
null
Many thanks for the excellent software. This report is about behavior I did not expect. Not sure if it is a bug or not. ```python >>> import pandas as pd >>> s = pd.Series([10, 20, 30, 'a', 'a', 'b', 'a']) >>> print(s) 0 10 1 20 2 30 3 a 4 a 5 b 6 a dtype: object >>> print(s.repl...
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19,999
DOC: Updated kurt docstring (for pandas sprint)
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2018-03-05T19:50:58Z
2018-03-07T22:20:48Z
2018-03-07T13:56:16Z
MEMBER
null
Assigned docstring for pandas documentation sprint Please note that I also removed **kwargs from the call signature here as they were not being used, so I thought it would be strange to document. For what it's worth I started a discussion on the G[oogle groups list ](https://groups.google.com/forum/#!topic/pandas-do...
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20,000
API & BUG: allow list-like y argument to df.plot & fix integer arg to x,y
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2018-03-05T20:01:24Z
2018-03-22T14:31:51Z
2018-03-22T14:31:51Z
CONTRIBUTOR
null
- [x] closes #19699 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry @TomAugspurger I added support for the user to pass a list-like to y, as discussed in #19699. The API to `df.plot` is relatively complex with lots of args, so lmk with quest...
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20,001
Unable to Build Documentation
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2018-03-05T20:42:56Z
2018-03-06T08:30:14Z
2018-03-06T08:30:14Z
MEMBER
null
```bash python make.py html Traceback (most recent call last): File "doc/make.py", line 23, in <module> import pandas ModuleNotFoundError: No module named 'pandas' ``` I believe a slight bug was introduced by c8859b57b891701f250fb05f2cc60d2e6cae2d6b in including `import pandas` at the top of the scri...
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20,002
0.22.0 - Splitting blank string causes exception
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2018-03-05T21:49:56Z
2018-03-17T19:42:53Z
2018-03-17T19:42:53Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python import pandas df = pandas.DataFrame({'test': ['']}) df.test.str.split(expand=True) ``` #### Problem description Splitting a blank (empty or whitespace) string causes an exception when `expand=True`. ``` IndexError ...
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20,003
PERF: isin() is slower for categorical data than for integers
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2018-03-05T21:53:11Z
2018-04-25T12:38:18Z
2018-04-25T12:38:18Z
CONTRIBUTOR
null
#### Problem description For long series and many categories 'Series.isin()' is slower for `categorical` data rather than for `int64`. If categories are built from strings, then the degradation of the performance is even larger. ```python import pandas as pd import numpy as np N = 3000000 Ncats = 100 cat...
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20,004
DOC: Add `Series` type to `to_sql` docstring
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20,005
DOC: fixed dynamic import mechanics of make.py
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2018-03-05T22:17:02Z
2018-05-14T21:11:42Z
2018-03-06T08:30:14Z
MEMBER
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- [X] closes #20001 - [ ] tests added / passed - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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20,006
TST: split series/test_indexing.py (#18614)
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2018-03-05T22:39:25Z
2018-03-06T12:25:41Z
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CONTRIBUTOR
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- [x] closes #18614 - [ ] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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20,007
Default value for missing values on merge
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2018-03-05T23:27:54Z
2021-09-08T15:35:03Z
2018-03-07T14:57:01Z
NONE
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This is a reopening of https://github.com/pandas-dev/pandas/issues/1836. The suggestion there was to add a parameter to `pd.merge`, such as `fillvalue`, whose value would be used instead of `NaN` for missing values. This isn't simply solved by `fillna` since adding `NaN` to columns casts them to `float`. https://git...
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20,008
to_latex shifts column names if MultiIndex contains empty label
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2018-03-06T00:24:20Z
2021-05-24T13:44:06Z
2021-05-24T13:44:06Z
MEMBER
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#### Code Sample, a copy-pastable example if possible ```python In [2]: df = pd.DataFrame([[1, 2]], columns=pd.MultiIndex.from_tuples([('', 'first'), ('2', 'second')])) In [3]: df Out[3]: 2 first second 0 1 2 In [4]: print(df.to_latex()) \begin{tabular}{lrr} \toprule {} & ...
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20,009
Providing index to pd.Series destroys categories
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2018-03-06T01:40:18Z
2018-03-06T13:38:37Z
2018-03-06T06:04:25Z
NONE
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#### Code Sample, a copy-pastable example if possible ```python dtype = pd.api.types.CategoricalDtype(categories=["A","B"]) ds1 = pd.Series(data="A", index=[1,2], dtype=dtype) ds2 = pd.Series(data="A", dtype=dtype) ``` #### Problem description In the above `ds1` has lost the category "B" while `ds2` has reta...
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