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https://api.github.com/repos/pandas-dev/pandas/issues/26313
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26,313
DOC: Replace .values with .to_numpy() in enhancingperf
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2019-05-08T02:07:47Z
2019-05-08T06:32:53Z
2019-05-08T06:32:44Z
CONTRIBUTOR
null
As suggested in https://github.com/pandas-dev/pandas/issues/24807#issuecomment-454905470 Replace `.values` with `.to_numpy()` in the benchmark demonstration code.
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26,314
Pivot / unstack on large data frame does not work int32 overflow
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47
2019-05-08T09:39:49Z
2021-07-02T05:45:00Z
null
NONE
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#### Code Sample, a copy-pastable example if possible ```python predictor_purchases_p = predictor_purchases.groupby(["ag", "artikelnr"])["som"].max().unstack().fillna(0) or predictor_purchases_p = predictor_purchases.pivot(index="ag", columns="artikelnr", value="som") ``` #### Problem description I'm worki...
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441,680,417
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26,315
Remove other pandas.core.index files from MyPy Blacklist
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2019-05-08T11:11:20Z
2019-05-24T03:06:14Z
2019-05-24T03:06:14Z
CONTRIBUTOR
null
- [x] xref #25882 - [ ] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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26,316
[ENH] Use default EA repr for IntervalArray
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2019-05-08T11:55:19Z
2019-09-10T04:14:18Z
2019-09-10T02:28:48Z
CONTRIBUTOR
null
- [x] closes #25022 - [x] 1 test deleted - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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26,317
Change doc reference to `read_csv` to `read_excel`
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1
2019-05-08T14:02:57Z
2019-05-08T15:25:51Z
2019-05-08T14:58:25Z
CONTRIBUTOR
null
Trivial documentation change - [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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26,318
circular import when doing "import pandas" on pandas‑0.24.2‑cp38‑cp38m‑win_amd64.whl
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2019-05-08T14:14:31Z
2019-06-16T14:39:35Z
2019-05-08T22:50:57Z
CONTRIBUTOR
null
Maybe it's the Python-3.8.0.a4 windows dll change ? just a remark, as it's all alpha. using cgohlke first wheel on Python-3.8.0a4, I have a strange message ```` Python 3.8.0a4 (v3.8.0a4:c1004b8546, May 7 2019, 12:46:11) [MSC v.1916 32 bit (Intel)] on win32 Type "copyright", "credits" or "license()" for more in...
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26,319
CLN: remove compat.lrange, part 3
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2019-05-08T15:34:45Z
2019-05-09T13:23:23Z
2019-05-09T12:31:58Z
CONTRIBUTOR
null
- [x] xref #25725, #26281 & #26289 Third part of the removal of ``compat.lrange`` from the code base.
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26,320
__or__ (and others?) should return NotImplemented for custom classes
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2019-05-08T19:44:41Z
2021-07-02T05:48:34Z
null
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python In [1]: class Test: ...: def __ror__(self, other): ...: print('here') ...: return self ...: In [2]: {} | Test() here Out[2]: <__main__.Test at 0x7f37a1601ba8> In [3]: import pandas In [4]: pandas.DataFram...
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26,321
Bug: Groupby with as_index=True causes incorrect summarization
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2019-05-09T03:28:12Z
2020-07-16T16:08:55Z
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MEMBER
null
#### Code Sample, a copy-pastable example: ```python import pandas as pd import numpy as np pd.show_versions() dates = ['2019-05-09', '2019-05-09', '2019-05-09'] date_series = pd.Series(dates) # it appears to happen on object dtype aggregations # where there is another object dtype in the frame with missi...
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26,322
CLN: remove compat.lmap
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2019-05-09T06:28:37Z
2019-05-10T22:05:42Z
2019-05-10T21:38:01Z
CONTRIBUTOR
null
- [x] xref #25725 Removal of ``compat.lmap`` from the code base.
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26,323
CLN: remove empty parenteses on class creation
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2019-05-09T06:39:56Z
2019-05-10T21:58:24Z
2019-05-09T23:53:14Z
CONTRIBUTOR
null
Minor clean-up: Some classes are created with a ``()`` which is not needed.
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26,324
BUG: fix numpy min/max compat with index (#26125)
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2019-05-09T08:49:14Z
2019-05-14T19:33:09Z
2019-05-09T12:36:35Z
CONTRIBUTOR
null
- [x] closes #26125 - [x] 2 tests added - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry When working on the original issue, I came across something similar : - `RangeIndex` had its own implementation of `max`/`min` with the same behavior - `Index` & `RangeIndex` could...
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26,325
Empty dataframe does not keep index name when index is used
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2019-05-09T10:00:44Z
2019-05-10T12:04:32Z
2019-05-10T02:48:30Z
NONE
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#### Empty dataframe does not keep index name when index is used ```python import pandas as pd df = pd.DataFrame({'a': [], 'b':[], 'c': []}) df = df.set_index('c') print(df.index.name) # prints 'c' # using index to generate new column df['d'] = df.index # looking at the name of the index print(df.index.name...
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26,326
BUG: ngroups and len(groups) do not equal when grouping with a list of Grouper and column label
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2019-05-09T10:56:16Z
2019-05-20T00:23:09Z
2019-05-20T00:23:09Z
NONE
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#### Code ```python m_index = pd.MultiIndex.from_product([['Mona', 'Dennis'], ['good', 'great']], names=['name', 'desc']) df = pd.DataFrame({'foo': [1, 2, 1, 2], 'bar': np.random.randn(4)}, index=m_index) n1 = df.groupby([pd.Grouper(level='name'), 'foo']).ngroups n2 = len(df.groupby([pd.Grouper(level='name'), ...
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26,327
Add type hints to dtypes/dtypes.py (CategoricalDtype)
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2019-05-09T16:36:31Z
2019-06-28T16:25:39Z
2019-06-28T16:25:04Z
CONTRIBUTOR
null
This PR adds type hints to pandas/core/dtypes/dtypes.py down to and including the ``CategoricalDtype`` part of the module. I'm more familiar with Categoricals than DateTimeArrays etc. and because I think there are some difficulties in implementing type hints, I think it would make sense to add a general ruleset for add...
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26,328
Robustness improvement for normalize.py
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2019-05-09T23:39:13Z
2019-06-27T22:39:59Z
2019-06-27T22:39:59Z
NONE
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- [x] closes #26284 - [x] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry Improves robustness of json_normalize for inconsistently formatted json. Fixes all observations in #26284
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26,329
FutureWarning difficult to identify source
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1
2019-05-10T02:09:28Z
2019-05-18T15:09:40Z
2019-05-18T15:09:40Z
NONE
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This is a suggestion, not a bug. The following resulted in a `FutureWarning` df = df.assign(block=(df.index.to_series().diff() != pd.Timedelta(15,'m')).cumsum()) > FutureWarning: The default of the 'keep_tz' keyword will change to True in a future release. You can set 'keep_tz=True' to obtain the future behav...
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Update python_requires to 3.5+
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442,518,174
MDExOlB1bGxSZXF1ZXN0Mjc3NjE1OTIw
26,331
Remove _DtypeOpsMixin
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2019-05-10T03:07:59Z
2019-05-12T14:37:40Z
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26,332
Remove Panel References from Tests
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2019-05-10T04:14:41Z
2020-01-16T00:34:00Z
2019-05-12T20:45:33Z
MEMBER
null
ref #25632 this removes a good deal of Panel references from tests though not all (excluding anything for msgpack). I think after this and #25567 get merged we can starting finalizing the Panel removal and get out of docs as well
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26,333
REGR: assigning scalar with a length no longer works
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7
2019-05-10T09:29:21Z
2021-11-04T01:02:23Z
null
MEMBER
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Assigning a value to a single location in a DataFrame (using `.loc` with scalar indexers) started to fail with "values with a length". Consider the following example: ``` In [1]: df = pd.DataFrame({'a': [1, 2, 3], 'b': [(1, 2), (1, 2, 3), (3, 4)]}) In [2]: df Out[2]: a b 0 1 (1, 2) 1 2...
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26,334
PERF: regression fixup for timestamp.TimestampConstruction.time_parse_iso8601_tz benchmark
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2019-05-10T10:02:04Z
2019-05-12T14:37:04Z
2019-05-12T14:36:58Z
CONTRIBUTOR
null
- [x] closes #N/A - [ ] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` For detection details see: https://github.com/pandas-dev/pandas/pull/26220#issuecomment-491143978 The slowdown was due to the use of `convert_to_tsobject` function. Asv result: master| patch| ...
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442,685,632
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26,335
Left join on column with timezone aware index with unexpected behavior
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1
2019-05-10T12:07:23Z
2019-05-14T16:04:00Z
2019-05-14T16:04:00Z
CONTRIBUTOR
null
I stumbled across some unexpected behavior when performing a left join on a specified column with time zone aware columns. ```python # Your code here df1 = pd.DataFrame({ 'date': pd.date_range(start='2018-01-01', periods=5, tz='America/Chicago'), 'vals': list('abcde')} ) df2 = pd.DataFrame({ 'da...
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26,336
Deprecate ordered=None for CategoricalDtype
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2019-05-10T15:59:56Z
2019-07-03T08:26:38Z
2019-07-03T08:26:38Z
CONTRIBUTOR
null
xref https://github.com/pandas-dev/pandas/pull/26327#discussion_r282733852. We currently allow CategoricalDtype.ordered to be None. It should just be a bool (default False). ``` In [8]: CategoricalDtype(categories=None, ordered=None).ordered # None ``` categories can be None, which means "infer later on". B...
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26,337
CLN: Remove python2-style longs in regexes
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2019-05-10T18:36:53Z
2019-05-12T15:03:14Z
2019-05-12T14:36:23Z
CONTRIBUTOR
null
- [x] xref #25725 Minor cleanup: Cleanup some regexes that guard against python2 style longs in their error messages.
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26,338
sum aggregation with columns of strings after groupby
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2019-05-10T18:59:19Z
2019-05-11T06:39:17Z
2019-05-10T21:31:24Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python # Your code here import pandas as pd df = pd.DataFrame([["c", "a", 1, 2], ["c", "b", 3, 4]]) df.groupby(0).sum() ``` #### Problem description I expect the sum aggregation after groupby to work similarly to normal aggregation: df.sum(). Howeve...
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26,339
Remove Python 2 in CLASSIFIERS
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2019-05-10T21:42:14Z
2019-05-12T20:02:38Z
2019-05-12T20:02:33Z
MEMBER
null
Follow-up to https://github.com/pandas-dev/pandas/pull/26330#issuecomment-491438048 @WillAyd
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26,340
pandas.read_parquet with parallel reads using pyarrow nthreads
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2019-05-11T01:06:38Z
2019-05-12T06:51:25Z
2019-05-11T02:46:53Z
NONE
null
According to these sources, `pyarrow.parquet` supports an `nthreads` argument for parallel reads, i.e. - https://wesmckinney.com/blog/python-parquet-multithreading/ the pyarrow.parquet engine - https://arrow.apache.org/docs/python/parquet.html#multithreaded-reads ```python import pyarrow.parquet as pq table = pq...
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26,341
[WIP} Fix type annotation in pandas/core/api
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2019-05-11T13:45:06Z
2019-05-13T08:18:47Z
2019-05-12T14:52:13Z
CONTRIBUTOR
null
- [x] closes #26148 - [x] tests passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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Constructing DataFrames using range fails
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2019-05-11T15:20:27Z
2019-05-12T14:35:54Z
2019-05-12T14:35:54Z
CONTRIBUTOR
null
Working on removing ``compat.lrange``, I've discovered that 1-dim lists, iterators and generators work as expected: ```python >>> pd.DataFrame(list(range(3))) # ok 0 0 0 1 1 2 2 >>> pd.DataFrame(iter(range(3))) # ok 0 0 0 1 1 2 2 >>> pd.DataFrame((i for i in range(3)) # ok 0 0 0 1 1...
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BUG: constructing a DataFrame using range doesn't work
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2019-05-11T15:35:04Z
2019-05-12T15:02:54Z
2019-05-12T14:35:54Z
CONTRIBUTOR
null
- [x] closes #26342 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry Fixes bug when constructing a ``DataFrame`` using a ``range``.
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CI: Use bash for Windows scripts on Azure
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2019-05-11T16:56:52Z
2019-12-24T14:56:56Z
2019-12-24T14:56:56Z
MEMBER
null
Azure now supports using bash in windows scripts, so I _think_ we can de-duplicate some of the windows-specific shell scripts. cc @datapythonista
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26,345
Windows 3.7 CI Failures
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2019-05-11T18:02:56Z
2019-05-15T20:11:14Z
2019-05-15T20:11:14Z
MEMBER
null
Lots of failures recently with CI build. I do see this in the logs: ```sh CondaValueError: Malformed version string '~': invalid character(s). ``` Which I assume is the root cause, though the dependency file hasn't been updated in some time. @TomAugspurger if you have any thoughts; maybe a conda-forge issue?
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DO NOT MERGE: Pinned hypothesis
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2
2019-05-11T18:20:40Z
2019-05-11T19:14:34Z
2019-05-11T19:14:29Z
MEMBER
null
I noticed our CI failures started around the time a new hypothesis version was posted to conda-forge so seeing if pinning that fixes the issue
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26,347
Memory leak on to_json?
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2019-05-11T18:37:31Z
2021-03-11T02:16:52Z
2019-05-11T18:44:51Z
NONE
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#### Code Sample, a copy-pastable example if possible ```python import resource import pandas as pd # some random data, some of them as array columns path = 'data.parquet' batches = 5000 df = pd.DataFrame({ 't': [pd.np.array(range(0, 180 * 60, 5))] * batches, }) # read the data above and convert...
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26,348
Memory leak when to_json is used on an array column.
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2019-05-11T18:40:34Z
2019-05-12T06:49:51Z
2019-05-12T06:31:04Z
NONE
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#### Code Sample, a copy-pastable example if possible ```python import resource import pandas as pd # some random data, some of them as array columns batches = 5000 df = pd.DataFrame({ 't': [pd.np.array(range(0, 180 * 60, 5))] * batches, }) # read the data above and convert it to json (e.g. the b...
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26,349
BUG: Instantiating DataFrames using dicts with iterators/generators as values causes errors
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2019-05-11T19:37:24Z
2019-05-20T00:24:36Z
2019-05-20T00:24:36Z
CONTRIBUTOR
null
Working on removing ``compat.lrange``, I've found that Series will accept iterators and generators as input: ```python >>> pd.Series(reversed(range(3))) # Iterator work for Series 0 0 1 1 2 2 dtype: int64 >>> pd.Series((i for i in range(3))) # Generators work for Series 0 0 1 1 2 2 dty...
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443,037,226
MDExOlB1bGxSZXF1ZXN0Mjc4MDA5NTY2
26,350
ENH: Allow quantile to accept an int
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5
2019-05-11T21:20:49Z
2019-05-13T00:52:53Z
2019-05-13T00:52:38Z
MEMBER
null
This change is to allow `quantile` to accept an `int` argument to make it easier to compute a set of evenly-spaced quantiles. For example, instead of typing `s.quantile([0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9])` or using `np.linspace` you can type `s.quantile(10)`. - [ - ] closes #xxxx (no issue) - [ x ] test...
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MDU6SXNzdWU0NDMwNTI3MzY=
26,351
Can't compare time index to a time instance
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4
2019-05-12T01:21:34Z
2019-05-12T22:06:14Z
2019-05-12T22:06:10Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python Python 3.7.3 (default, May 8 2019, 05:28:42) [GCC 6.3.0 20170516] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import pandas as pd >>> import datetime >>> df = pd.DataFrame([[datetime.time(1, 1, 0), 1]], co...
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MDExOlB1bGxSZXF1ZXN0Mjc4MDMzNDI5
26,352
BLD: Work around Azure Windows 3.7 failure
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4
2019-05-12T07:15:08Z
2019-05-12T20:02:00Z
2019-05-12T11:04:36Z
MEMBER
null
Closes #26345
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443,075,472
MDExOlB1bGxSZXF1ZXN0Mjc4MDM0NjUx
26,353
Add na_filter documentation to read_excel
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4
2019-05-12T07:41:56Z
2019-06-27T03:33:27Z
2019-06-27T03:33:27Z
CONTRIBUTOR
null
- [x] closes #25453 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry (Not needed)
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443,080,028
MDExOlB1bGxSZXF1ZXN0Mjc4MDM3NzQ5
26,354
API: ExtensionArray.argsort places the missing value at the end
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13
2019-05-12T08:43:28Z
2019-06-30T05:31:42Z
2019-06-30T05:31:42Z
CONTRIBUTOR
null
- closes #21801 - tests added - passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - whatsnew entry `_values_for_argsort` returns different values for missing value in different EA. For example, missing value in `PandasArray` gets `np.nan` and in `PeriodArray` gets `-9223372036854775808` (in my m...
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26,355
BUG: Fix MultiIndex DataFrame to_csv() segfault
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4
2019-05-12T13:15:24Z
2019-05-16T13:51:21Z
2019-05-16T01:47:40Z
CONTRIBUTOR
null
- [x] closes #26303 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry This fix for #26303 would avoid an indexing issue caused by using MultiIndexes which results to a segfault in the example provided in #26303.
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26,356
BUG: Exception when frame constructed from dict of iterators
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2019-05-12T15:37:46Z
2019-05-20T00:24:42Z
2019-05-20T00:24:37Z
CONTRIBUTOR
null
- [x] closes #26349 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry Allows iterators as values when instantiating DataFrames using dicts. Also collected the iterable-to-list functionality from core/series.py into core/common.py, so it is shar...
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443,134,109
MDExOlB1bGxSZXF1ZXN0Mjc4MDcyNDM3
26,357
CLN: Remove run_with_env.cmd
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2
2019-05-12T18:40:49Z
2019-05-13T08:14:32Z
2019-05-12T20:02:55Z
MEMBER
null
Was used for AppVeyor, which we dropped.
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443,140,103
MDExOlB1bGxSZXF1ZXN0Mjc4MDc2MzE3
26,358
BLD: Correct gcsfs install on Azure
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6
2019-05-12T19:49:43Z
2019-05-15T02:17:55Z
2019-05-12T20:34:08Z
MEMBER
null
Follow-up #26352 Also realized that the `gcsfs` install was placed in the wrong place (needs to be placed after the `activate` command). However, you will notice then that the install is the culprit for the earlier 3.7 build failures (something is not right on `conda-forge` and / with `gcsfs` and `3.7`). Note thou...
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443,140,882
MDExOlB1bGxSZXF1ZXN0Mjc4MDc2NzUz
26,359
BUG: groupby.agg returns incorrect results for uint64 cols (#26310)
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2019-05-12T19:57:36Z
2019-05-18T14:45:37Z
2019-05-18T14:45:06Z
CONTRIBUTOR
null
- [x] closes #26310 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry A way to avoid incorrect coercion to float64 in the case of uint64 input is to introduce an additional check to `ensure_int64_or_float64`
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443,145,380
MDExOlB1bGxSZXF1ZXN0Mjc4MDc5ODUx
26,360
New benchmarks for parsing dates with dayfirst=True and format='%d-%m-%Y'
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2019-05-12T20:47:17Z
2019-05-14T17:13:05Z
2019-05-14T17:13:01Z
CONTRIBUTOR
null
- [x] closes #25848 - [x] tests added - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` Gap in performance between use dayfirst or format is acceptable now. `asv run -E existing -b ParseDateComparison -a warmup_time=2 -a sample_time=2`: | io.csv.ParseDateComparison.time_read_csv_dayfirst |...
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MDU6SXNzdWU0NDMxNTIxMjE=
26,361
COMPAT: numpy_dev build failing
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2019-05-12T22:04:02Z
2019-05-13T17:17:04Z
2019-05-13T17:17:04Z
CONTRIBUTOR
null
https://dev.azure.com/pandas-dev/pandas/_build/results?buildId=11349 I think this was just working ``` =================================== FAILURES =================================== ______________________ TestRangeIndex.test_numpy_argsort _______________________ [gw1] linux -- Python 3.7.3 /home/vsts/minicon...
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26,362
BUG: DataFrame.join on tz aware index and column
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2019-05-13T05:57:16Z
2019-05-14T16:42:04Z
2019-05-14T16:04:00Z
MEMBER
null
- [x] closes #26335 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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26,363
Fix type annotations for pandas.core.indexes.base
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2019-05-13T08:33:01Z
2019-05-13T20:21:54Z
2019-05-13T20:21:54Z
CONTRIBUTOR
null
Part of #25882 Current errors are: pandas\core\indexes\base.py:9: error: Module 'pandas._libs' has no attribute 'join'
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26,364
Fix type annotations for pandas.core.indexes.datetimelike
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2019-05-13T09:08:12Z
2019-05-13T14:03:16Z
2019-05-13T14:03:16Z
CONTRIBUTOR
null
Part of #25882 Current errors are: pandas\core\indexes\datetimelike.py:65: error: "Callable[[Any], Any]" has no attribute "fget" pandas\core\indexes\datetimelike.py:66: error: "Callable[[Any], Any]" has no attribute "fget" pandas\core\indexes\datetimelike.py:67: error: "Callable[[Any], Any]" has no ...
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26,365
[WIP] Fix type annotations for Pandas.core.indexes.datetimelike
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2019-05-13T09:35:20Z
2019-05-13T13:40:18Z
2019-05-13T13:28:22Z
CONTRIBUTOR
null
- [x] closes #26364 - [ ] tests passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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26,366
Fix type annotations for pandas.core.indexes.datetimes
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2019-05-13T09:58:05Z
2019-05-24T15:32:15Z
2019-05-24T15:32:15Z
CONTRIBUTOR
null
Part of #25882 Current errors are: pandas\core\indexes\datetimes.py:7: error: Module 'pandas._libs' has no attribute 'join' pandas\core\indexes\datetimes.py:89: error: Definition of "_data" in base class "DatetimeIndexOpsMixin" is incompatible with definition in base class "Index" pandas\core\indexe...
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26,367
Pandas import breaks when setting filterwarnings
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2019-05-13T13:52:12Z
2020-07-12T11:45:35Z
2020-07-12T11:45:35Z
MEMBER
null
With released pandas (tested with 0.23.4), you get the following: ``` >>> import warnings >>> warnings.filterwarnings('error') >>> import pandas Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/joris/miniconda3/lib/python3.7/site-packages/pandas/__init__.py", line 26, in <...
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26,368
corrwith in 0.24 is much slower than 0.23 (especially if corr axis is smaller than other axis)
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2019-05-13T13:58:07Z
2021-02-06T18:57:55Z
2021-02-06T18:57:55Z
NONE
null
Hi, I've noticed that corrwith on pandas 0.24 is much slower than in 0.23, especially when trying to correlate dataframes where the length of the axis of correlation is much smaller than the length of the other axis. Example: ```python import pandas as pd import numpy as np df1 = pd.DataFrame(np.random....
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MDExOlB1bGxSZXF1ZXN0Mjc4MzE0NzI2
26,369
Fix broken link to contributing guide website
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2019-05-13T15:02:38Z
2019-05-14T17:04:15Z
2019-05-13T16:40:21Z
CONTRIBUTOR
null
- [ ] closes #xxxx - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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26,370
Feature requests: pandas.DataFrame.quantile with exclusive/inclusive of median
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2019-05-13T15:12:07Z
2021-07-02T05:55:57Z
2021-07-02T05:55:57Z
NONE
null
There seems to always be the debate when calculating the 1st and 3rd quartiles in statistics about whether the median is included or not included in calculating the q1, q3. Some calculations include the median, while other exclude it. Regardless of the "correct" way to calculate this out, it would be nice if pandas cou...
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26,371
Fix type annotation for pandas.core.indexes.base
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2019-05-13T15:19:17Z
2019-05-15T05:40:20Z
2019-05-13T20:21:54Z
CONTRIBUTOR
null
- [x] closes #26363 - [x] tests passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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26,372
Misc Type Annotation fixes
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2019-05-13T15:20:49Z
2019-05-20T08:43:10Z
2019-05-18T00:34:32Z
CONTRIBUTOR
null
Part of #25882 - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` Cleanup of type annotations in files that only had a handful of straightforward errors (or no longer threw errors). These include: # pandas.core.util.hasing `pandas/core/util/hashing.py:8: error: Module 'pandas._libs' has no at...
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26,373
Compat with numpy dev argsort (radix sort added)
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2019-05-13T16:13:58Z
2019-05-13T17:19:50Z
2019-05-13T17:17:04Z
CONTRIBUTOR
null
https://github.com/numpy/numpy/commit/12fb1015511ac3804d0785bb0d1fe539385548ad adds radix sort to np.argsort. For versions of NumPy with this change (>=1.17), we need to adjust our validator. Closes https://github.com/pandas-dev/pandas/issues/26361
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26,374
BUG: ngroups and len(groups) do not equal when grouping with a list of Grouper and column label (GH26326)
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2019-05-13T16:54:35Z
2019-05-20T00:23:13Z
2019-05-20T00:23:09Z
CONTRIBUTOR
null
- [x] closes #26326 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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26,375
Remove extraneous brackets
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2019-05-13T17:47:50Z
2019-05-14T13:39:40Z
2019-05-14T01:40:54Z
CONTRIBUTOR
null
Trivial documentation changes Dictionary should have one set of brackets (as seen below in documentation example `{'a': np.float64, 'b': np.int32}`). Brackets don't make sense around `'w' or 'a'`. - [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --dif...
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26,376
pd.read_fwf fails with file pointer to url
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2019-05-13T18:23:18Z
2021-09-12T17:47:53Z
null
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#### Code Sample, a copy-pastable example if possible ```python # Your code here import urllib.request import pandas as pd url='ftp://ftp.ncdc.noaa.gov/pub/data/igra/igra2-station-list.txt' urllib.request.urlretrieve(url,url.split('/')[-1]) igrainv=pd.read_fwf(url.split('/')[-1],widths=(2,1,3,5,9,10,7,...
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26,377
Fix type annotations in pandas.core.ops
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2019-05-13T20:12:58Z
2019-05-16T01:27:08Z
2019-05-16T00:15:23Z
CONTRIBUTOR
null
Part of #25882 - [X] tests passed - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` Corrects these errors in `pandas.core.ops`: ``` pandas/core/ops.py:632: error: Unsupported target for indexed assignment pandas/core/ops.py:633: error: Value of type "object" is not indexable pandas/core/ops....
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26,378
SparseDataFrame.to_parquet fails with new error
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2019-05-13T21:27:53Z
2019-05-18T15:21:57Z
2019-05-13T21:54:57Z
NONE
null
#### Code Sample ```python import pandas as pd # v0.24.2 import scipy.sparse # v1.1.0 df = pd.SparseDataFrame(scipy.sparse.random(1000, 1000), columns=list(map(str, range(1000))), default_fill_value=0.0) df.to_parquet('rpd.pq', engine='pyarrow') ``` Give...
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MDExOlB1bGxSZXF1ZXN0Mjc4NDc2NzQ2
26,379
BUG: Series.combine_first with mixed timezones
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2019-05-14T00:06:47Z
2019-07-22T06:13:28Z
2019-05-19T23:55:20Z
MEMBER
null
- [x] closes #26283 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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26,380
ENH: Implementing NEP 18's __array_function__
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2019-05-14T00:37:27Z
2021-03-22T22:27:50Z
null
NONE
null
It would be useful to have `__array_function__` support as described in [NEP 18]( https://www.numpy.org/neps/nep-0018-array-function-protocol.html#alternatives ) implemented for Pandas objects. This would allow users to run NumPy functions on Pandas objects while deferring to Pandas on how those operations should run.
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26,381
BUG: error calculating BusinessHourMixin.apply for long business hour per day
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2019-05-14T02:51:55Z
2019-05-17T17:50:13Z
2019-05-17T17:50:06Z
CONTRIBUTOR
null
- [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew: handle the case where adding of business hour to the timestamp results in an ending time landing in the next business time period. Example Input: ```python bh = BusinessHour(n=4, start='00:00', end='23...
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26,382
[BUG] groupby apply would get first group twice !
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2019-05-14T03:58:35Z
2019-05-14T04:07:58Z
2019-05-14T04:00:42Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python In [1]: import pandas as pd In [2]: import numpy as np In [3]: pd.DataFrame({'a': np.random.randint(0, 3, 10)}).groupby('a').apply(lambda x:print(x.name)) 0 0 1 2 In [4]: pd.__version__ Out[4]: '0.24.2' ``` #### Problem description A...
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26,383
Prefixed batch script commands with call
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2019-05-14T04:30:21Z
2020-01-16T00:33:59Z
2019-05-15T14:45:05Z
MEMBER
null
maybe fixes #26345
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26,384
Remove Deprecated Azure CI Step
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2019-05-14T05:33:51Z
2019-05-15T14:42:54Z
2019-05-15T12:20:45Z
MEMBER
null
Found this while investigating #26345 may or may not be related but figured worth a separate PR in either case
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26,385
GroupBy nth ignores observed keyword for Categorical
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2019-05-14T06:00:42Z
2019-08-20T19:02:10Z
2019-08-20T19:02:10Z
MEMBER
null
Was looking to consolidate nth, first and last in the GroupBy world but was hitting some issues with categorical tests and handling of missing data. Note that the following calls are not equivalent, though they should be: ```python >>> import numpy as np >>> import pandas as pd >>> s1 = pd.Categorical([np.nan, ...
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26,386
CLN: Cleanup code in parsers.pyx
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26,387
Inconsistent datetime conversion within column with dd/mm format
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2019-05-14T10:15:27Z
2019-05-14T10:21:11Z
2019-05-14T10:20:48Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible ```python >>> pd.to_datetime(['30/04/19', '01/05/19']) DatetimeIndex(['2019-04-30', '2019-01-05'], dtype='datetime64[ns]', freq=None) ``` #### Problem description The converter should infer the same format for both values - so it should infer that both val...
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26,388
read_parquet S3 dir support
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2019-05-14T10:36:57Z
2021-06-15T12:34:00Z
2020-04-26T21:41:36Z
NONE
null
When using spark to process data and save to s3, the files are like ```bash s3://bucket/path/_SUCCESS s3://bucket/path/part-00000-uuid.snappy.parquet s3://bucket/path/part-00002-uuid.snappy.parquet s3://bucket/path/part-00001-uuid.snappy.parquet s3://bucket/path/part-00003-uuid.snappy.parquet ``` It would be n...
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Converting json to csv
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2019-05-14T11:27:19Z
2019-08-21T16:20:30Z
2019-08-21T16:20:29Z
NONE
null
#### Code Sample, a copy-pastable example if possible ```python # Your code here dirs = os.listdir(path) frame = pandas.DataFrame() #frame = frame.astype(str) output_folder_time_stamp = str(datetime.datetime.now()).replace(":", " ").rsplit(".", 1)[0] final_output_path = outputp...
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26,390
BUG: assigning Series.array / PandasArray to column fails
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2019-05-14T14:21:18Z
2019-05-19T18:11:28Z
2019-05-19T18:11:28Z
MEMBER
null
Assigning a PandasArray (so also the result of `df['a'].array`) of the correct length to add a column fails: ```python In [1]: df = pd.DataFrame({'a': [1, 2, 3, 4], 'b': ['a', 'b', 'c', 'd']}) In [2]: df['c'] = pd.array([1, 2, N...
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[PERF] Get rid of MultiIndex conversion in IntervalIndex.is_unique
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2019-05-14T15:16:05Z
2019-05-28T03:56:18Z
2019-05-28T03:55:53Z
CONTRIBUTOR
null
- xref #24813 - benchmark added - passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - whatsnew entry This PR follows #25159 (in which I broke something when merging). ``` All benchmarks: before after ratio [304d8d4b] [4ec1fe97] <master> <in...
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[TEST] Add two more parameters to the test_dti_add_sub_nonzero_mth_offset
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2019-05-14T15:32:51Z
2019-05-26T12:59:26Z
2019-05-25T19:24:39Z
CONTRIBUTOR
null
- follow up the comment in #26292 - passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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26,393
Holiday based on the lunar calendar?
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2019-05-14T15:44:31Z
2019-10-07T21:39:01Z
2019-10-07T21:39:01Z
NONE
null
I happened to notice that pandas.tseries.offsets.CustomBusinessDay can not handle holidays based on the lunar calendar. I think it would be great if the class CustomBusinessDay support the lunar holidays in Korea, China, etc.
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BUG: to_numeric does not validate the errors keyword
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2019-05-14T15:53:35Z
2019-05-20T11:11:56Z
2019-05-20T11:11:36Z
CONTRIBUTOR
null
From discussion below: `pd.to_numeric` does not validate the value passed to the `errors` keyword, so any random value is interpreted as `errors='coerce'`. --- *Original report*: #### Code Sample, a copy-pastable example if possible ```python df = pd.DataFrame({'Strings': ['fire', 'hose'], 'Numbers': [...
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different type conversion results in assignments using DataFrame.loc and DataFrame.at
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2019-05-14T16:21:23Z
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#### Code Sample, a copy-pastable example if possible ```python # Python 3.5.6 |Anaconda custom (64-bit)| (default, Aug 26 2018, 21:41:56) # assignment behavior with DataFrame.loc and DataFrame.at # df.loc[] = x will promote dataframe column type to x's type # df.at[] = x will cast x value to column's type # ap...
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CLN: remove compat.lrange
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2019-05-14T18:34:49Z
2019-05-15T13:04:10Z
2019-05-15T12:16:08Z
CONTRIBUTOR
null
- [x] xref #25725, - [x] xref #26281, #26289 & #26319 Fourth and final part of the removal of ``compat.lrange`` from the code base.
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DataFrame.describe excludes top and freq for empty DataFrame
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2019-05-14T20:58:13Z
2019-06-01T14:52:36Z
2019-06-01T14:52:36Z
CONTRIBUTOR
null
Right now, the output shape and dtype of DataFrame.describe for object columns depends on whether the DataFrame is empty. #### Code Sample, a copy-pastable example if possible ```python In [75]: x = pd.DataFrame({"A": ['a', np.nan, np.nan]}) In [76]: x.describe() Out[76]: A count 1 unique 1 to...
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26,398
Fix type annotations in pandas.core.resample
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2019-05-14T22:30:55Z
2019-05-16T01:28:03Z
2019-05-15T23:46:51Z
CONTRIBUTOR
null
Part of #25882 - [X] tests passed - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` This PR addresses the following mypy errors in **pandas.core.resample**: ``` pandas/core/resample.py:34: error: Need type annotation for '_shared_docs_kwargs' pandas/core/resample.py:876: error: All conditiona...
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26,399
ENH: Support nested renaming / selection
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39
2019-05-15T03:39:08Z
2019-05-30T01:29:59Z
2019-05-30T01:29:41Z
CONTRIBUTOR
null
This adds special support for controlling the output column names when performing column-specific groupby aggregations. We use kwargs, using the keywords as the output names, and expecting tuples of `(selection, aggfunc)`. ```python In [2]: df = pd.DataFrame({'kind': ['cat', 'dog', 'cat', 'dog'], ...: ...
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ENH: Support multiple opening hours intervals for BusinessHour
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2019-05-15T04:57:28Z
2019-06-03T08:23:10Z
2019-06-03T07:51:55Z
CONTRIBUTOR
null
- [x] closes #15481 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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26,401
Test doctests in pandas/core/tools/datetimes.py
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2019-05-15T05:32:48Z
2019-05-15T12:31:23Z
2019-05-15T12:31:23Z
CONTRIBUTOR
null
#### Code Sample, a copy-pastable example if possible Doctests in `to_datetime()`. #### Problem description It is being failed as below: ``` Failed example: df = pd.DataFrame({'year': [2015, 2016], Exception raised: Traceback (most recent call last): File "/Applications/PyCharm.app/Conten...
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26,402
DOC: Test doctests in pandas/core/tools/datetimes.py
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2019-05-15T05:33:36Z
2019-05-15T12:53:19Z
2019-05-15T12:31:23Z
CONTRIBUTOR
null
- [x] closes #26401 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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26,403
DEPR: Deprecate ordered=None for CategoricalDtype
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2019-05-15T06:27:48Z
2019-11-28T04:31:01Z
2019-07-03T08:26:38Z
MEMBER
null
- [X] closes #26336 - [X] tests added / passed - [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [X] whatsnew entry All of the logic related to breaking changes looks to be consolidated in `CategoricalDtype.update_dtype`, so I'm raising the warning there when a breaking change would occur and...
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26,404
Fix type annotations in pandas.core.indexes.datetimes
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2019-05-15T06:53:47Z
2019-05-25T00:12:59Z
2019-05-24T15:32:15Z
CONTRIBUTOR
null
- [x] closes #26366 - [x] tests passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry `pandas/core/indexes/timedeltas.py` taken care of as well since the errors were the same.
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DEPR: deprecate Series/DataFrame.compound
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2019-05-15T06:55:56Z
2019-11-21T01:17:50Z
2019-05-16T07:15:28Z
MEMBER
null
xref https://github.com/pandas-dev/pandas/issues/18262 Not sure if we need to point to an alternative in the deprecation warning. I can put the exact "formula" for what we are currently calculating, but I don't know enough from finance to know if that is actually good to point to (eg I don't directly see that formul...
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26,406
BUG: to_numpy on categorical data with tz aware datetime categories returns datetime64
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2019-05-15T08:21:12Z
2020-11-30T00:09:10Z
2020-11-30T00:09:10Z
MEMBER
null
``` In [1]: s = pd.Series(pd.Categorical(pd.date_range("2012", periods=3, tz='Europe/Brussels'))) In [2]: s.to_numpy() Out[2]: array(['2011-12-31T23:00:00.000000000', '2012-01-01T23:00:00.000000000', '2012-01-02T23:00:00.000000000'], dtype='datetime64[ns]') In [3]: s = pd.Series(pd.date_range("2012",...
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444,331,432
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26,407
SparseArrays backed by other Extension array/dtype ?
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3
2019-05-15T09:29:00Z
2020-04-25T20:53:08Z
null
MEMBER
null
You can create an SparseDtype with a ExtensionDtype as subtype: ``` In [14]: spdt = pd.SparseDtype(pd.DatetimeTZDtype(tz='Europe/Brussels')) In [15]: spdt Out[15]: Sparse[datetime64[ns, Europe/Brussels], NaT] ``` but I don't think that you can actually create a SparseArray with that? At least, there seem...
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444,344,576
MDExOlB1bGxSZXF1ZXN0Mjc5MDIxODk0
26,408
BUG: MultiIndex not dropping nan level and invalid code value
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10
2019-05-15T09:56:17Z
2019-06-02T08:40:33Z
2019-06-01T14:56:35Z
CONTRIBUTOR
null
- [x] closes #19387 - [x] tests added / passed - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry Please take note that another bug is also fixed in this PR: When the MultiIndex is constructed with code value < -1, a segmentation fault would be resulted in subsequent oper...
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26,409
DEPR: deprecate get_values
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21
2019-05-15T10:25:55Z
2019-07-01T15:57:47Z
2019-07-01T15:57:42Z
MEMBER
null
Closes https://github.com/pandas-dev/pandas/issues/19617 Reviving an old branch I had lying around. So this was more a quick experiment to see what it involves. The main "problem" is that we ourselves use `get_values` in a bunch of places (eg `values_from_object` which is massively used). The current situation: ...
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444,366,635
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26,410
API: getting the "densified" values of a Categorical (preserving categories dtype) ?
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2019-05-15T10:43:54Z
2021-07-02T06:01:25Z
null
MEMBER
null
Assume we have a Categorical, and want to convert to a dense array (not encoded). We have `np.asarray(..)` and the `to_dense()` method (which uses asarray under the hood): ``` In [1]: cat = pd.Categorical(['a', 'b', 'a']) In [2]: np.asarray(cat) Out[2]: array(['a', 'b', 'a'], dtype=object) In [3]: cat.to_de...
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26,411
Grouping, then resampling empty DataFrame leads to it losing column names and index
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2019-05-15T11:13:04Z
2021-07-22T20:50:16Z
2021-02-24T16:39:00Z
NONE
null
#### Code Sample ```python import pandas as pd empty_df = pd.DataFrame([], columns=["a", "b"], index=pd.TimedeltaIndex([])) resampled_df = empty_df.groupby("a").resample(rule=pd.to_timedelta("00:00:01")).mean() print resampled_df print resampled_df["b"] ``` #### Problem description After grouping and...
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26,412
Using .loc.__setitem__ with integer slices does not raise
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2019-05-15T13:51:49Z
2020-03-08T15:45:26Z
2020-03-08T15:45:26Z
NONE
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#### Code Sample ```python >>> d = pd.DataFrame({'a': range(5), 'b': range(2,7), 'c': range(3,8)}) >>> d a b c 0 0 2 3 1 1 3 4 2 2 4 5 3 3 5 6 4 4 6 7 >>> d.loc[0:2, 0:2] = 42 # note that loc is used with an integer slice! should this raise? >>> d # this is somehow the expected resul...
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