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https://api.github.com/repos/pandas-dev/pandas/issues/21712
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337,727,972
MDExOlB1bGxSZXF1ZXN0MTk4ODM3MDIy
21,712
Move Unchanged arith methods to EA mixins
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3
2018-07-03T02:55:46Z
2018-07-06T14:37:01Z
2018-07-03T23:40:09Z
MEMBER
null
Next steps after #19902. Breaking these up into smaller pieces than usual because I don't know what bits will prove controversial. All this PR does is take a few of the easiest no-changes-needed methods and moved them to the EA mixins.
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337,747,763
MDU6SXNzdWUzMzc3NDc3NjM=
21,713
CategoricalDtype should be exposed in the top-level `pandas` namespace
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2018-07-03T05:11:32Z
2019-12-26T03:56:55Z
2019-12-26T03:56:55Z
NONE
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Proposal: expose `CategoricalDtype` in the top-level `pandas` namespace. As of pandas 0.23.0, `.astype(..., categories=...)` raises a `FutureWarning` but `CategoricalDtype`, the recommended alternative, is still buried in `pandas.api.types`. This makes its use considerably more verbose than the old interface: ```...
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337,747,881
MDExOlB1bGxSZXF1ZXN0MTk4ODUxNDcy
21,714
De-privatize tslibs functions
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2018-07-03T05:12:23Z
2018-07-11T20:24:22Z
2018-07-03T14:53:57Z
MEMBER
null
Related: an item on the tslibs TODO list, #21698.
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337,752,282
MDExOlB1bGxSZXF1ZXN0MTk4ODU0NjEy
21,715
implement maybe_wrap_in_index for EA Mixin dispatch
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2018-07-03T05:38:49Z
2018-07-05T02:43:59Z
2018-07-04T03:44:43Z
MEMBER
null
Implements `maybe_wrap_in_index`, shows the easiest places where it can be used. If merged, the follow-on will be to move the affected methods to the EA mixin classes, leaving just the dispatch/wrapping behind. Implements `_local_timestamps` on the `DatetimeArrayMixin`, since that will be needed before we can move ...
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337,802,177
MDU6SXNzdWUzMzc4MDIxNzc=
21,716
GroupBy OHLC Error When Used in .agg with Other Functions
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2018-07-03T08:50:37Z
2018-07-07T13:44:04Z
2018-07-07T13:44:04Z
MEMBER
null
#### Code Sample, a copy-pastable example if possible ```python-traceback In [12]: np.random.seed(1234) In [13]: df = pd.DataFrame(np.random.rand(10, 1), index=pd.date_range(start='2018-01-01', freq='5H', periods=10)) # This call works fine In [14]: df.groupby(pd.Grouper(freq='D')).agg(['ohlc', 'sum']) ...
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337,836,472
MDExOlB1bGxSZXF1ZXN0MTk4OTE2ODEx
21,717
TST: Parametrize tests in tools/test_numeric.py
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2018-07-03T10:22:17Z
2018-07-04T00:12:47Z
2018-07-03T23:38:38Z
MEMBER
null
Title is self-explanatory.
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337,873,077
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21,718
implicite typecast under python2 by access columns index
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2018-07-03T12:14:38Z
2019-12-12T18:38:47Z
2019-12-12T18:38:46Z
NONE
null
#### by looking on the columns you can't see wath you get, pandas 0.23.1 example with python2 string ```python In [1]: df = pd.DataFrame() In [2]: df['a'] = [1, 3] In [3]: df.columns Out[3]: Index([u'a'], dtype='object') In [4]: print(type(df.columns[0])) <type 'str'> ``` example with unicode ```pyth...
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21,719
docstring and whitespace cleanup
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2018-07-05T02:43:24Z
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MDU6SXNzdWUzMzgwMjIzNjc=
21,720
BUG: df.duplicated treats None as np.nan in object columns
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2018-07-03T19:12:12Z
2021-06-20T05:08:00Z
null
CONTRIBUTOR
null
Found out while writing tests for `.duplicated` in #21645 (so far, `.duplicated` was almost exclusively tested implicitly through `.drop_duplicates`) At first I thought this is intended behaviour for `DataFrame.duplicated()`, but `Series.duplicated()` does not treat it equally. This makes sense to me, since as objec...
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MDExOlB1bGxSZXF1ZXN0MTk5MTI2OTk2
21,721
implement _local_timestamps in DatetimeArrayMixin
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1
2018-07-04T02:53:02Z
2018-07-06T14:36:43Z
2018-07-05T16:51:02Z
MEMBER
null
Broken out of #21715 because it is a blocker for a handful of orthogonal follow-ons.
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https://api.github.com/repos/pandas-dev/pandas/issues/21722
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338,119,566
MDExOlB1bGxSZXF1ZXN0MTk5MTMxNTE2
21,722
move ndarray-returning functions to EA mixin classes
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5
2018-07-04T03:37:02Z
2018-07-06T14:36:30Z
2018-07-05T10:39:00Z
MEMBER
null
Orthogonal to other EAMixin PRs. The methods this moves are unchanged. Docstrings changed e.g. "DatetimeIndex" to "Datetime Array/Index". I'm open to suggestions for better wording. The error message in `PeriodArrayMixin._maybe_convert_timedelta` is changed to use `type(self).__name__` instead of hardcoding `Pe...
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https://api.github.com/repos/pandas-dev/pandas/issues/21723
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338,135,281
MDExOlB1bGxSZXF1ZXN0MTk5MTQyNzQ3
21,723
Code deduplication in tz_convert and related
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2018-07-04T05:32:57Z
2018-07-04T16:10:20Z
2018-07-04T05:37:23Z
MEMBER
null
`tz_convert_tzlocal_to_utc` and `tz_convert_utc_to_tzlocal` are identical except for a `+` changed to a `-`. This implements `_tz_convert_tzlocal_utc` which has an argument that flips the sign. IIUC because it is inlined, that check should be free. An upcoming PR will do the same thing for the `get_dst_info` cases...
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https://api.github.com/repos/pandas-dev/pandas/issues/21724
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338,137,659
MDExOlB1bGxSZXF1ZXN0MTk5MTQ0NDg3
21,724
CLN: Delay converting bins to datetimelike until necessary
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2
2018-07-04T05:48:11Z
2018-07-04T16:04:29Z
2018-07-04T12:50:22Z
MEMBER
null
- [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` xref #20956, `q/cut` now returns datetimelike bins when `retbins=True`. Instead of always trying to convert bins to datetimelike (even when `retbins=False`), moving the conversion to `_postprocess_for_cut` until after `r...
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338,138,542
MDU6SXNzdWUzMzgxMzg1NDI=
21,725
Support multiple characters for `comment` in read_csv
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4
2018-07-04T05:53:50Z
2020-07-17T03:01:44Z
2018-07-04T12:05:35Z
NONE
null
my code is: ```python vcf = pd.read_table("com8-2.N85-2.merge.snp.vcf", header=0, sep="\t", comment="##") ``` and get this error: `ValueError: Only length-1 comment characters supported` the error means the length of comment must be one ? why not allowed for two characters ? The python version is pyth...
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https://api.github.com/repos/pandas-dev/pandas/issues/21726
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338,214,518
MDU6SXNzdWUzMzgyMTQ1MTg=
21,726
DataFrame.replace doesn't work with categorical data
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1
2018-07-04T10:10:41Z
2018-07-04T10:58:39Z
2018-07-04T10:58:32Z
NONE
null
#### Code Sample ```python import pandas as pd df = pd.DataFrame(["x", "y", "z"], dtype='category') df.replace({"x": "y"}) ``` #### Problem description ##### Current output ``` ~/.local/lib/python3.6/site-packages/pandas/core/internals.py in __init__(self, values, placement, ndim, fastpath) 109 ...
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https://api.github.com/repos/pandas-dev/pandas/issues/21727
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338,329,448
MDExOlB1bGxSZXF1ZXN0MTk5MjkwNTY1
21,727
Implement _tz_convert_tzlocal_utc for de-duplication
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2
2018-07-04T16:15:20Z
2018-07-05T02:42:49Z
2018-07-04T18:41:54Z
MEMBER
null
There is a bunch of code in conversion (and a bit in resolution, period, and tslib) that can be de-duplicated. This is one part of ~5 steps in that process.
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338,329,763
MDExOlB1bGxSZXF1ZXN0MTk5MjkwODE0
21,728
misplaced scatter/hexbin subplot colorbars
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3
2018-07-04T16:16:36Z
2018-07-05T16:52:12Z
2018-07-05T16:47:12Z
CONTRIBUTOR
null
- [x] closes #20455 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry NOTE: I have tested the following in Jupyter lab. When I run: ```python %matplotlib inline import matplotlib.pyplot as plt import numpy as np import pandas as pd rand...
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338,332,320
MDU6SXNzdWUzMzgzMzIzMjA=
21,729
pd.Categorical.contains([item, otheritem]) raises ValueError
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2018-07-04T16:28:17Z
2019-07-09T21:13:28Z
2019-07-09T21:13:28Z
MEMBER
null
#### Code Sample, a copy-pastable example if possible ```python In [2]: idx = pd.CategoricalIndex([1, 2, 3]) In [3]: list('a') in idx --------------------------------------------------------------------------- TypeError Traceback (most recent call last) <ipython-input-3-76f69ba...
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338,360,381
MDExOlB1bGxSZXF1ZXN0MTk5MzEyODMy
21,730
implement _tz_convert_dst for de-duplication
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1
2018-07-04T19:18:41Z
2018-07-06T14:30:10Z
2018-07-06T14:12:02Z
MEMBER
null
Analogous to #21727, this handles the `get_dst_info` case whereas that handled the `tzlocal` case. Fleshes out docstring as discussed in #21727 All the other uses of `get_dst_info` are handled _slightly_ differently. Need to figure out whether those are intentional to see if more de-duplication (or perf) is ava...
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21,731
Fixes example code in docstring of pandas.DataFrame.query
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2
2018-07-04T19:21:45Z
2018-07-07T23:51:13Z
2018-07-06T02:35:39Z
CONTRIBUTOR
null
- [ ] closes #21733 - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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21,732
ValueError: Duplicated level error with groupby on index for expanding
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1
2018-07-04T19:24:12Z
2018-07-05T02:02:59Z
2018-07-05T02:01:50Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python # Building Dataframe (reused from example, the fact that it uses datetime and numpy is probably not that important) date_range = pd.date_range(start=dt.datetime(2017,1,1), end=dt.datetime(2020,12,31), freq='W') to_concat = [] for val in range(1,5):...
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21,733
Error in docstring for pandas/core/frame.py
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0
2018-07-04T19:25:55Z
2018-07-06T02:35:39Z
2018-07-06T02:35:39Z
CONTRIBUTOR
null
There is an error in the docstring for the query function in `pandas/core/frame.py`. The PR here fixes this: https://github.com/pandas-dev/pandas/pull/21731 #### Code Sample, a copy-pastable example if possible ```python # Your code here ``` #### Problem description [this should explain **why** the ...
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21,734
Datetimes are inconsistently truncated in to_csv
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8
2018-07-04T19:37:21Z
2020-09-24T00:32:26Z
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NONE
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#### Code Sample, a copy-pastable example if possible ```python import pandas as pd df = pd.DataFrame({ 'date': pd.to_datetime('1970-01-01'), 'datetime': pd.date_range('1970-01-01', periods=5, freq='H') }) df['date'].to_csv('/dev/stdout', index=False) df[['date', 'datetime']].to_csv('/dev/stdout', ind...
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21,735
DOC: Add nrows to DataFrame.from_records docstring
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2018-07-04T21:01:43Z
2018-07-05T16:23:28Z
2018-07-05T16:23:15Z
CONTRIBUTOR
null
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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21,736
Python plot giving errors when reading data through pandas
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2018-07-04T22:57:13Z
2018-08-14T19:55:49Z
2018-08-14T19:55:48Z
NONE
null
Issue Report Checklist [v ] Searched the issues page for similar reports [ v] Read the relevant sections of the Spyder Troubleshooting Guide and followed its advice [v ] Reproduced the issue after updating with conda update spyder (or pip, if not using Anaconda) [ v] Could not reproduce inside jupyter qtconsole (if...
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21,737
BUG: DatetimeIndex.unique shifts tz-aware dates
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2018-07-04T23:08:49Z
2018-08-07T05:04:42Z
2018-08-06T10:23:27Z
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null
#### Code Sample, a copy-pastable example if possible ```python import pandas as pd start = pd.Timestamp('2018-7-3 2:00:00', tz='America/Los_Angeles') end = start + pd.Timedelta('36H') a = pd.DatetimeIndex(start=start, end=end, freq='12H') a.normalize().unique() ``` #### Problem description The normalize...
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21,738
Implement tslibs.__init__, move easy bits of tslib
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2018-07-04T23:14:38Z
2018-07-06T14:04:00Z
2018-07-05T10:42:46Z
MEMBER
null
Easy answers to where `tslib.ints_to_pytimedelta` and `tslib.normalize_date` belong, so this moves those. Starts populating the `tslibs.__init__` namespace; leaves updating imports for later. Cleans up a couple of unnecessary imports elsewhere.
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CLN/TST: Cleanup tests in test_ujson.py
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4
2018-07-05T00:48:06Z
2018-07-05T22:38:38Z
2018-07-05T22:17:11Z
MEMBER
null
* Actually test the outputs * Add more parameterization * Take advantage of `pytest` features, such as exception contexts This test module really needed an update 😄
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338,398,049
MDExOlB1bGxSZXF1ZXN0MTk5MzM5Mzg5
21,740
CLN: Remove Legacy MultiIndex Index Compatibility
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11
2018-07-05T01:06:55Z
2018-07-27T12:18:00Z
2018-07-27T11:33:16Z
CONTRIBUTOR
null
- [x] closes #21654 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] what's new - removing legacy MultiIndex internal formats
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338,474,799
MDU6SXNzdWUzMzg0NzQ3OTk=
21,741
Dimension mismatch when reading categorical HDF5 column with weird NaN encoding
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5
2018-07-05T08:29:21Z
2019-10-21T19:34:22Z
null
NONE
null
Hi guys, I got a crash reading an HDF5 file with a message "ValueError: operands could not be broadcast together with shapes (171285,) (15,) (171285,)" (stack trace below). I think the problem arises whenever reading a categorical column via pytables where NaN is stored as one of the categories (rather than a specia...
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21,742
Merge() without a common column (LARGE DATASET, so no fake_key=1)
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4
2018-07-05T08:33:58Z
2018-08-11T16:19:31Z
2018-08-11T16:19:18Z
NONE
null
#### Code Sample, a copy-pastable example if possible ``` #RIPE FEATURES start_decimal_ip end_decimal_ip isSL ... isSUBNET isINTERNET isISP 0 621457152 621457663 1 ... 0 1 0 1 3273214112 3273214143 0 ... 0 0 0 2 ...
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https://api.github.com/repos/pandas-dev/pandas/issues/21743
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21,743
dataframe drop_duplicates method
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2018-07-05T08:56:45Z
2018-07-05T15:34:39Z
2018-07-05T15:34:38Z
NONE
null
#### Code Sample, a copy-pastable example if possible if os.path.exists(historyFile): df = pd.read_csv(historyFile) newDf = getDailyMpOrder(mysqlCon,checkDate) df = pd.concat([df,newDf]) df = df.drop_duplicates() else: checkDate = "20180101" df = getDailyMpOrder(mysqlCon,checkDate) ##...
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21,744
TST: catch warnings for to_hierarchical deprecation
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1
2018-07-05T11:24:19Z
2018-07-05T16:13:10Z
2018-07-05T16:12:34Z
CONTRIBUTOR
null
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338,587,366
MDExOlB1bGxSZXF1ZXN0MTk5NDc5OTg3
21,745
DOC: Update documentation with correct link
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5
2018-07-05T13:59:49Z
2018-07-06T09:51:43Z
2018-07-05T22:42:51Z
CONTRIBUTOR
null
Fixed from shttp to https in docs link
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21,746
test_info_repr failing locally
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6
2018-07-05T15:06:00Z
2018-08-07T13:12:13Z
2018-08-07T13:12:13Z
MEMBER
null
OSX py2.7 ``` def test_info_repr(self): max_rows = 60 max_cols = 20 # Long h, w = max_rows + 1, max_cols - 1 df = DataFrame({k: np.arange(1, 1 + h) for k in np.arange(w)}) assert has_vertically_truncated_repr(df) with option_context('display.large_repr'...
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21,747
DOC: update parquet documentation categorical support
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3
2018-07-05T16:54:23Z
2020-04-24T09:50:57Z
2020-04-23T23:22:37Z
MEMBER
null
http://pandas-docs.github.io/pandas-docs-travis/io.html#parquet is a bit outdated, we should investigate a bit the current state of what support there is in pyarrow and fastparquet
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21,748
to_csv 'w' mode doesn't truncate for StringIO
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2018-07-05T17:38:01Z
2018-07-07T17:25:49Z
2018-07-07T17:14:19Z
NONE
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#### Code Sample, a copy-pastable example if possible ```python from io import StringIO import pandas as pd import tempfile s = StringIO() # TemporaryFile fails for other reasons, but seems to be covered in pandas-dev/pandas#21471 with tempfile.NamedTemporaryFile('w+') as f: for df in (pd.DataFrame({'a': ...
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338,682,068
MDU6SXNzdWUzMzg2ODIwNjg=
21,749
DOCS: Update import statements in docstrings
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2018-07-05T18:34:00Z
2021-09-18T03:52:02Z
null
CONTRIBUTOR
null
xref https://github.com/pandas-dev/pandas/pull/21731#pullrequestreview-134460126 - [ ] ./pandas/plotting/_converter.py|134 col 17| ">>> from pandas.plotting import register_matplotlib_converters" - [ ] pandas/plotting/_misc.py|501 col 5| >>> from pandas import read_csv - [ ] pandas/plotting/_misc.py|502 col 5| >>>...
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21,750
DOC: clean-up 0.23.2 whatsnew file
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21,751
pd.wide_to_long() only recognises all numerical snubname suffixes
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2018-07-05T19:05:13Z
2018-07-05T21:56:03Z
2018-07-05T21:55:56Z
NONE
null
#### Code Sample, a copy-pastable example if possible ``` import pandas as pd import numpy as np np.random.seed(123) df = pd.DataFrame({"test-a" : {0 : "a", 1 : "b", 2 : "c"}, "test-b" : {0 : "d", 1 : "e", 2 : "f"}, "test-c" : {0 : 2.5, 1 : 1.2, 2 : .7}, ...
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21,752
RLS: release notes for 0.23.2
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21,753
CLN: clean up groupby / categorical
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2018-07-05T22:39:16Z
2018-07-06T14:03:13Z
2018-07-06T14:03:13Z
CONTRIBUTOR
null
xref #21151
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21,754
DOC: Correct docstring for check_dtype in assert_almost_equal
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2018-07-05T23:00:21Z
2018-07-06T03:19:30Z
2018-07-06T02:34:55Z
MEMBER
null
Title is self-explanatory.
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21,755
Some groupby methods keep null grouping keys
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2018-07-06T00:21:40Z
2019-03-04T22:47:10Z
null
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python df = pd.DataFrame({'A': ['a','b',None,'a','b',None], 'B': range(6)}) df.groupby('A').sum() # output has two rows df.groupby('A').first() # output has two rows df.groupby('A').head(1) # output has three rows, one for the null group df.groupby('A')....
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21,756
TST: Remove check_exact from assert_almost_equal
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2018-07-06T06:01:21Z
2018-07-06T22:55:24Z
2018-07-06T14:07:27Z
MEMBER
null
From a semantic point of view, if you're checking for approximate equality, there shouldn't be a parameter that allows you to disable the whole purpose of the function.
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DOC: Fix typos in Series.idxmin/idxmax docs
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2018-07-06T07:41:22Z
2018-07-06T14:27:35Z
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CONTRIBUTOR
null
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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21,758
Importing pandas changes return value of sys.getsizeof?
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2018-07-06T08:57:34Z
2021-06-20T05:14:00Z
null
NONE
null
#### Code Sample ``` a = "a" import sys print(sys.getsizeof(a)) import pandas print(sys.getsizeof(a)) ``` #### Problem description When I run the above code sample, I get output like this: ``` Python 3.5.5 |Anaconda, Inc.| (default, May 13 2018, 21:12:35) [GCC 7.2.0] on linux Type "help", "copyright",...
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https://api.github.com/repos/pandas-dev/pandas/issues/21759
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338,866,591
MDExOlB1bGxSZXF1ZXN0MTk5NjkwNjgw
21,759
Fix whatsnew dates
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2018-07-06T09:19:38Z
2018-07-09T08:22:08Z
2018-07-06T13:57:33Z
CONTRIBUTOR
null
Up to v0.23.0, there's always a date in the whatsnew-entries. This adds them back to v0.23.1 & v0.23.2, as well as a blank template for v0.24.0.
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338,870,654
MDU6SXNzdWUzMzg4NzA2NTQ=
21,760
MemoryError: While reading csv file
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2018-07-06T09:32:06Z
2021-05-10T06:41:25Z
2018-07-06T10:54:01Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python # Your code here import pandas as pd data = pd.read_csv("stochastic_data_2015.01.01 00_00_.csv",encoding = "utf-16", header = 0,sep="\t") data.head(10) ``` The file size is: 27 GB. The RAM I have is 8 GB with 250 GB SSD hard disk on Windows 10. ...
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338,877,192
MDU6SXNzdWUzMzg4NzcxOTI=
21,761
Error while deleting/dropping a series/dataframe entry with timezone aware timestamps.
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2018-07-06T09:52:09Z
2018-11-04T15:16:56Z
2018-11-04T15:16:56Z
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#### Code Sample, a copy-pastable example if possible ```python import pandas as pd start = pd.Timestamp('20170101', tz='Europe/Berlin') end = pd.Timestamp('20180101', tz='Europe/Berlin') index = pd.date_range(start, end, freq='15min') data = [1 for x in range(len(index))] series = pd.Series(index=index, data=...
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21,762
pd.Timedelta() cannot process offset alias T while pd.infer_freq() return this format.
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2018-07-06T10:41:17Z
2018-11-06T03:27:30Z
2018-11-06T03:27:30Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python import pandas as pd series = pd.Series([1, 2, 3], pd.date_range('201701010000', '201701010030', freq='15min')) print(pd.infer_freq(series.index)) # Error pd.Timedelta(pd.infer_freq(series.index)) # While this works pd.Timedelta(series.index.freq)...
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21,763
TST: unreliable parser test
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2018-07-06T14:06:55Z
2018-07-08T22:10:15Z
2018-07-08T22:10:15Z
CONTRIBUTOR
null
this test is somehow non-deterministic and occasionally fails with a ``ResourceWarning``: https://circleci.com/gh/pandas-dev/pandas/15501#tests/containers/3 not really sure if this is a red-herring of something else ``` self = <pandas.tests.io.parser.test_parsers.TestPythonParser object at 0x7f90482356a0> ...
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21,764
Followup to #21738
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2018-07-06T14:25:22Z
2018-07-06T17:26:39Z
2018-07-06T16:18:47Z
MEMBER
null
Addresses comments/requests from #21738.
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21,765
KeyError for crosstab on Series with same name - Still an issue in v0.23.1
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2018-07-06T15:05:37Z
2018-07-06T16:30:09Z
2018-07-06T16:29:53Z
CONTRIBUTOR
null
#### Code Sample ```python s1 = pd.Series([1,1,2,2,3,3], name='s') s2 = pd.Series([1,1,1,2,2,2], name='s') pd.crosstab(s1, s2) ``` **Return:** Short version: > ValueError: Duplicated level name: "s", assigned to level 1, is already used for level 0. Long version: <details> ``` -------------...
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21,766
DOC: timeseries-specific indexing / operators
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2018-07-06T15:31:28Z
2018-07-07T14:12:59Z
null
CONTRIBUTOR
null
let's make a separate section in the docs where where highlite the time-series nature of these ops (e.g. that they operate on the index), maybe attached to the partial string indexing section - [ ] ``truncate`` - [ ] ``at_time`` - [ ] ``between_time`` - [ ] ``first`` - [ ] ``last``
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21,767
`pandas.Categorical.from_codes` incorrectly converts NaN codes to 0.
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2018-07-06T15:53:56Z
2018-08-01T22:12:54Z
2018-08-01T22:12:54Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python import pandas def test_categorical_from_codes(): "Demonstrate issue with pandas.Categorical.from_codes." codes = pandas.Series([1, 2, float('NaN')]) categories = ['foo', 'bar', 'baz'] c = pandas.Categorical.from_codes(codes, ca...
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pd.read_table: Using space as delimiter on file with trailing space gives cryptic error
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```python import numpy as np import os import pandas as pd # put test.csv in same folder as script mydir = os.path.dirname(os.path.abspath(__file__)) csv_path = os.path.join(mydir, "test.csv") df = pd.read_table(csv_path, sep=' ', comment='#', header=None, ...
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21,769
Removed Need for OHLC As First Element if Used in .agg
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2018-07-06T16:13:38Z
2018-07-07T13:44:10Z
2018-07-07T13:44:04Z
MEMBER
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- [X] closes #21716 - [X] tests added / passed - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [X] whatsnew entry
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MDU6SXNzdWUzMzg5OTYyNDM=
21,770
Too generic Exception in multindex reindex raise statement
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4
2018-07-06T16:17:16Z
2018-07-07T14:16:29Z
2018-07-07T14:16:29Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python import pandas as pd, numpy as np idx = pd.MultiIndex.from_tuples([(0, 0), (1, 1), (1, 1), (2, 2)]) a = pd.Series(np.arange(4), index=idx) new_idx = pd.MultiIndex.from_tuples([(0, 0), (1, 1), (2, 2)]) a.reindex(new_idx) ``` ```python-traceback (....
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21,771
Whatsnew note for v0.23.3
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MEMBER
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21,772
Backport PR #21771 on branch 0.23.x
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2018-07-06T16:30:54Z
2018-07-06T20:33:23Z
2018-07-06T16:32:06Z
NONE
null
Backport PR #21771: Whatsnew note for v0.23.3
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21,773
Interpolation nonnumeric error handling
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2
2018-07-06T16:53:42Z
2018-10-11T01:54:08Z
2018-10-11T01:54:08Z
NONE
null
- [x] closes #21662 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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21,774
Changed import statements in examples in DOCs
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2018-07-06T16:55:07Z
2018-07-07T23:52:32Z
2018-07-07T19:33:57Z
CONTRIBUTOR
null
This is regarding Issue #21749 - [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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21,775
Fix categorical from codes nan 21767
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2018-07-06T17:07:45Z
2018-08-01T22:13:07Z
2018-08-01T22:12:54Z
CONTRIBUTOR
null
- [x] closes #21767 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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21,776
Move methods and properties to EA Mixin classes
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2018-07-06T17:12:03Z
2018-07-06T18:56:35Z
2018-07-06T18:38:29Z
MEMBER
null
Not the all-at-once that @jorisvandenbossche asked for, but it's a much bigger chunk than the last few.
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DataFrame iloc mutates array or Series indexer with negative index value
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1
2018-07-06T18:38:17Z
2018-07-06T19:10:49Z
2018-07-06T19:10:35Z
NONE
null
Using pandas version 0.23.1 and 0.23.2 from conda-forge. ```python import pandas as pd df = pd.DataFrame({'a': [10, 20, 30]}) # with list indexer, iloc works as expected L = [-1, 0, 1] df.iloc[L] assert L == [-1, 0, 1] # with Series indexer, iloc mutates the Series! s = pd.Series(L) df.iloc[s] assert (s ...
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21,778
API: boolean Extension Array
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0
2018-07-06T18:59:50Z
2019-11-25T15:51:58Z
2019-11-25T15:49:49Z
CONTRIBUTOR
null
xref #20700
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21,779
TST: Add more information for unexpected warnings
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3
2018-07-06T19:28:03Z
2018-07-07T18:10:35Z
2018-07-07T14:22:59Z
MEMBER
null
Title is self-explanatory. This will be useful for uncovering the problematic files (hopefully) if / when #21763 rears its head.
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21,780
Replaces Exceptions with ValueError in MultiIndex, closes #21770
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1
2018-07-06T21:09:49Z
2018-07-07T14:16:29Z
2018-07-07T14:16:29Z
CONTRIBUTOR
null
- [X] closes #21770 - [X] tests added / passed - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [X] whatsnew entry
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21,781
remove PeriodIndex.tz_convert, tz_localize?
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2018-07-07T01:45:20Z
2018-07-18T01:00:19Z
2018-07-18T01:00:19Z
MEMBER
null
ATM they just raise `NotImplementedError("Not yet implemented for PeriodIndex")`; if the idea of `Period` ever gaining a tz is out, these should be too.
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21,782
REF: move more methods to EAMixins
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1
2018-07-07T01:54:55Z
2018-07-07T14:56:38Z
2018-07-07T14:56:16Z
MEMBER
null
With the exception of the comparison ops, this is the last stuff that can be moved before I have to implement the constructors (and hence a buttload of tests). Let's get this out of the way first. (For the comparison ops there is some super jujitsu that needs to be un-wound, so will do that separately)
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Why data in DataFrame(data) can be a generator but not an iterator?
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1
2018-07-07T02:53:05Z
2018-07-07T11:18:36Z
2018-07-07T11:18:30Z
CONTRIBUTOR
null
`Generator` inherits from `Iterator`, `Iterator` inherits from `Iterable`. And `list([iterable])` takes an `Iterable` as argument. So, why `data` in `DataFrame(data)` can't be an `Iterable`? https://github.com/pandas-dev/pandas/blob/620abc403d371446afe38fc1e63f0d90ea27b80a/pandas/core/frame.py#L381-L383 https:/...
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21,784
Clearly document what a list-like is
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1
2018-07-07T08:09:36Z
2020-09-21T17:26:12Z
null
MEMBER
null
I think we need a doc section which states what is accepted as list-like: each method which accepts list-likes would then link to that doc section. This will basically detail the types for which ``pandas.core.dtypes.common.is_list_like`` returns ``True``, with the only exception of ``tuple``, which we should _not_ d...
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21,785
pandas 0.23.2 fails to build on top of Python 3.7.0 (while 0.23.1 works fine)
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2018-07-07T11:19:43Z
2018-07-07T19:38:22Z
2018-07-07T19:37:39Z
NONE
null
After seeing the release announcement for pandas 0.23.2 where is was mentioned that this is the first release supporting Python 3.7.0, I looked into switching from pandas 0.23.1 which we were planning to use to 0.23.2 (cfr. https://github.com/easybuilders/easybuild-easyconfigs/pull/6480). However, I'm seeing compila...
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21,786
.rolling().std() only returns NaN in Python3.7
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2018-07-07T11:43:16Z
2020-08-07T05:48:41Z
2018-07-26T17:32:30Z
NONE
null
```python import pandas as pd d = {"col": [1, 23, 231, 231, 4, 353, 62, 3, 56, 43, 354, 43, 231, 21, 7]} df = pd.DataFrame(data=d) std = df["col"].std() df["mean5"] = df["col"].rolling(5).mean() df["std5"] = df["col"].rolling(5).std() print(std) print(df[["mean5", "std5"]]) # OUTPUT 130.20855066648528 ...
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21,787
Backport PR #21769 on branch 0.23.x
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2018-07-08T03:29:10Z
2018-07-07T16:50:10Z
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Backport PR #21769: Removed Need for OHLC As First Element if Used in .agg
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21,788
0.23.3 fixup
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2018-07-07T14:29:41Z
2018-07-07T14:31:34Z
2018-07-07T14:31:26Z
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21,789
ENH: add reduce op (and groupby reduce) support to EA
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2018-07-07T14:43:08Z
2018-10-12T12:19:58Z
2018-10-12T12:19:58Z
CONTRIBUTOR
null
after #21160
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MDU6SXNzdWUzMzkxNTQ2NjA=
21,790
API: inconsistencies between grouped and grouped[['col']] in groupby
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1
2018-07-07T15:37:02Z
2021-06-20T05:15:31Z
null
MEMBER
null
One a DataFrameGroupBy object, you can already select some of the columns you want to apply your functions on, but apart from that, I would not expect it to influence the output structure: ``` In [56]: df = pd.DataFrame({'A' : ['foo', 'bar', 'foo', 'bar'], ...: 'B' : np.random.randn(4), ...
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21,791
ENH: add suffixes arg to concat
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2018-07-07T16:06:49Z
2019-12-17T17:54:47Z
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CONTRIBUTOR
null
xref #18347 the case for using ``add_suffix/add_prefix`` is either: 1. modify the column labels (can use ``.str.columns + ....`` 2. concat with annotation lables from there source frames (and not using a MultiIndex) so this is an issue about adding support for 2., similar to the way ``pd.merge`` suffixes work...
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21,792
pd.concat of Series with int64 column and Series with int64-ExtensionArray yields int64
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2018-07-07T16:16:38Z
2021-04-12T10:14:14Z
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CONTRIBUTOR
null
#### Code Sample ```python import fletcher as fr import pandas as pd df_ext = pd.DataFrame({'a': fr.FletcherArray([1, 2])}) df_ext.info() # <class 'pandas.core.frame.DataFrame'> # RangeIndex: 2 entries, 0 to 1 # Data columns (total 1 columns): # a 2 non-null fletcher[int64] # dtypes: fletcher[int64](1)...
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21,793
BUG: PeriodIndex comparisons break on listlike
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2018-07-07T16:40:30Z
2020-05-15T12:58:18Z
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MEMBER
null
``` idx = pd.period_range('2016', periods=3, freq='M') >>> idx == idx.values Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python2.7/site-packages/pandas/core/indexes/period.py", line 107, in wrapper other = Period(other, freq=self.freq) File "pandas/_lib...
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21,794
Removed Need for OHLC As First Element if Used in .agg (#21769)
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2018-07-07T16:49:35Z
2018-07-08T03:28:25Z
2018-07-07T18:57:43Z
CONTRIBUTOR
null
closes #21787
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TST: create pandas/tests/arrays to consolidate pandas-extension array testing
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Bounds checks for IntegerArray
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2
2018-07-07T19:49:03Z
2021-07-01T23:55:16Z
2021-07-01T23:55:16Z
CONTRIBUTOR
null
On the current PR there are a couple "issues" with handling out of bounds values. This follows NumPy's behavior, but is maybe not what the user wants ```python In [18]: pd.core.arrays.IntegerArray([-1, 2, 3], dtype=pd.core.arrays.integer.UInt16Dtype) Out[18]: IntegerArray([65535, 2, 3], dtype='UInt16') ``` ...
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339,170,602
MDExOlB1bGxSZXF1ZXN0MTk5OTExNDAx
21,797
DOC: remove imports and use pd in docstrings
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2018-07-07T19:56:20Z
2018-07-08T18:45:59Z
2018-07-08T18:45:53Z
CONTRIBUTOR
null
null
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339,170,636
MDExOlB1bGxSZXF1ZXN0MTk5OTExNDE5
21,798
move PeriodIndex comparisons, implement PeriodArray constructor
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1
2018-07-07T19:57:08Z
2018-07-07T21:24:28Z
2018-07-07T21:21:38Z
MEMBER
null
PeriodIndex comparisons turn out to be easier to move than the others (though partly because ATM they are broken: #21793), so this moves them over first. Following that, most of the remaining PeriodArray arithmetic methods require `shift`, which in turns requires the constructors, so I went ahead and implemented tho...
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339,171,624
MDExOlB1bGxSZXF1ZXN0MTk5OTExOTE5
21,799
ENH: between_time, at_time accept axis parameter
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12
2018-07-07T20:13:04Z
2018-11-19T01:21:36Z
2018-11-19T01:21:33Z
CONTRIBUTOR
null
xref #2141 - [x] closes #8839 - [x] tests added / passed Axis parameter added to between_time and at_time, defaults to index for DataFrame
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339,174,979
MDExOlB1bGxSZXF1ZXN0MTk5OTEzNjA2
21,800
Use CB3 syntax for compiler
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0
2018-07-07T21:07:18Z
2018-07-07T22:42:56Z
2018-07-07T22:42:56Z
CONTRIBUTOR
null
This fixes the `headerpad_max_install_names` I was seeing.
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MDU6SXNzdWUzMzkxNzgzNDA=
21,801
API: argsort behaviour for ExtensionArray with missing values
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13
2018-07-07T22:07:01Z
2019-12-30T15:49:50Z
2019-12-30T15:49:22Z
MEMBER
null
Currently we don't specify what the behaviour should be for `ExtensionArray.argsort` when there are missing values. This is not a huge problem because the `Series.sort_values` deals with the missing values itself (only argsorts the non-missing data), but still we should pin down and test the behaviour. I suppose w...
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339,178,527
MDExOlB1bGxSZXF1ZXN0MTk5OTE1NTg4
21,802
CLN: Remove unused imports in pyx files
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4
2018-07-07T22:10:48Z
2018-07-08T18:51:51Z
2018-07-08T18:51:22Z
MEMBER
null
cc @jbrockmendel Removed unused imports flagged by PyCharm. Compiled fine locally, waiting for CI to pass.
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MDExOlB1bGxSZXF1ZXN0MTk5OTE2MTYz
21,803
implement constructors for TimedeltaArray, DatetimeArray
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2018-07-07T22:29:31Z
2018-07-11T20:23:47Z
2018-07-08T12:57:11Z
MEMBER
null
Implements AttributesMixin since this is a pattern we might want to formalize. The `_simple_new` that this implements for TimedeltaArray and DatetimeArray are pretty close to the "full" versions in the Index classes. The `__new__` methods though are very much stripped down for the now. With these in place we get...
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MDU6SXNzdWUzMzkxODA4OTg=
21,804
BUG: unwanted casting in .isin
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2018-07-07T22:51:49Z
2020-12-29T23:44:28Z
2020-12-29T23:44:28Z
CONTRIBUTOR
null
xref #19508 for a partial PR ``` In [3]: values = [1, 0.5] ...: pd.Series([1, 0]).isin(values) ...: Out[3]: 0 True 1 True dtype: bool ``` should be [True, False]
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MDExOlB1bGxSZXF1ZXN0MTk5OTE2ODg3
21,805
DOC: Bunch o warnings
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1
2018-07-07T22:55:10Z
2018-07-07T23:04:25Z
2018-07-07T22:58:07Z
CONTRIBUTOR
null
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339,181,480
MDExOlB1bGxSZXF1ZXN0MTk5OTE3MTI3
21,806
Consistent Naming Standard When Using Dict in GroupBy .agg
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2
2018-07-07T23:03:05Z
2019-02-28T07:23:19Z
2018-08-17T17:17:10Z
MEMBER
null
- [X] closes #21790 - [] tests added / passed - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry This is a WIP as all of the tests in the groupby directory pass, but there are some outside of that which need touch ups. This is a relatively aggressive change so I figured I'd ...
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339,183,978
MDExOlB1bGxSZXF1ZXN0MTk5OTE4NDY5
21,807
BENCH: asv csv reading benchmarks now rewind StringIO objects
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6
2018-07-07T23:55:10Z
2018-07-28T14:29:35Z
2018-07-28T14:29:32Z
CONTRIBUTOR
null
In short, the `asv` benchmarks used for timing `read_csv` are actually reading in empty file-like objects most of the time at the moment. This is because the `setup()` method of the benchmarks is only called between **repeats** and not between **iterations** of repeats--see [writing benchmarks docs](http://asv.readthed...
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339,190,846
MDExOlB1bGxSZXF1ZXN0MTk5OTIyMTQ4
21,808
More doc warnings
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2
2018-07-08T02:33:32Z
2018-07-08T14:05:26Z
2018-07-08T13:01:26Z
CONTRIBUTOR
null
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339,197,998
MDU6SXNzdWUzMzkxOTc5OTg=
21,809
CategoricalIndex reidex duplicates values
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4
2018-07-08T05:18:31Z
2018-12-02T23:10:44Z
2018-12-02T23:10:44Z
NONE
null
From [SO question](https://stackoverflow.com/q/51228928/2901002): **Sample**: np.random.seed(57) idx = pd.CategoricalIndex(['low'] * 3 + ['hi'] * 3) dfb = pd.DataFrame(np.random.rand(6, 3), columns=list('abc'), index=idx) print (dfb) a b c low 0.087350 ...
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21,810
Why does pandas Round method explodes my data frame?
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3
2018-07-08T05:24:45Z
2018-07-08T21:38:13Z
2018-07-08T12:48:01Z
NONE
null
I try to round all values in this [dataframe][1]. However, the pandas [round() method][2] explodes my dataframe from 150 rows to 7518 rows. Perhaps there is something odd with the data in the dataframe, but then again, one would not expect a simple rounding function to do this. Below, I replicate the error using ...
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21,811
Add unit test for #12813
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2
2018-07-08T13:48:15Z
2018-07-08T17:47:13Z
2018-07-08T14:14:25Z
CONTRIBUTOR
null
- [x] closes #12813 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry The bug was already fixed with my previous PR but this adds a fixture to a unit test to also test read-only arrays as factorize input.
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