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BUG: DataFrame.combine_first() works incorrect with with string indexes
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2
2020-10-30T12:42:12Z
2020-11-02T00:42:21Z
2020-11-02T00:42:21Z
NONE
null
- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [x] (optional) I have confirmed this bug exists on the master branch of pandas. --- #### Code Sample, a copy-pastable example ```python def test_astype(self): df_data = {'a': {4: '162', 7: '85'}, 'b': {4: NA, 7: NA}} df2_data = {'a': {139: '85'}, 'b': {139: NA}} df = DataFrame(df_data).astype({ "a": 'string', "b": 'string', }) df2 = DataFrame(df2_data).astype({ "a": 'string', "b": 'string', }) sum_df = df.set_index(['a', 'b']).combine_first( df2.set_index(['a', 'b']), ).reset_index() assert sum_df ``` #### Problem description You can see that in resulting `sum_df` there are duplicate rows like ('85', nan). This behavior is incorrect. combine_first() method should join such rows
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2020-10-30T19:44:23Z
2020-10-31T15:18:38Z
2020-10-31T15:12:34Z
MEMBER
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Splitting this off to get a cleaner diff in an upcoming PR(s) that make setitem_with_indexer go through split_path for _all_ DataFrame cases, giving us less special-casing to worry about.
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37,522
TST: suppress warnings we cant do anything about
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2020-10-30T20:01:48Z
2020-10-30T22:08:34Z
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and remove redundant filterwarnings from excel.test_readers
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0
2020-10-30T20:19:29Z
2020-10-31T15:19:29Z
2020-10-31T15:16:04Z
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MDExOlB1bGxSZXF1ZXN0NTEzMjYzNTg4
37,524
BUG: slice_canonize incorrectly raising
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1
2020-10-30T20:21:29Z
2020-10-31T19:32:58Z
2020-10-31T19:31:24Z
MEMBER
null
- [ ] closes #xxxx - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry Doesn't appear to affect anything in master, but stumbled on it when implementing the PR do always return views when indexing on columns.
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733,498,971
MDExOlB1bGxSZXF1ZXN0NTEzMjcwNDQz
37,525
TST/REF: collect tests from test_api into method-specific files
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0
2020-10-30T20:31:52Z
2020-10-31T16:03:15Z
2020-10-31T15:28:18Z
MEMBER
null
I was surprised we didnt already have a test_copy Also an easter egg: ``` def test_keys(self, datetime_series): # HACK: By doing this in two stages, we avoid 2to3 wrapping the call # to .keys() in a list() getkeys = datetime_series.keys assert getkeys() is datetime_series.index ```
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MDU6SXNzdWU3MzM1MzQ4MzE=
37,526
ENH: Smaller package size
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1
2020-10-30T21:44:17Z
2020-10-30T21:48:32Z
2020-10-30T21:48:16Z
NONE
null
Could the `pandas.tests` package be an optional package? It consumes a huge portion of the package size, which may not be required for many production purposes. ``` $ du -s /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/* | sort -n 4 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/testing.py 4 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/_typing.py 4 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/_version.py 12 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/__init__.py 16 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/arrays 24 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/errors 32 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/conftest.py 64 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/api 92 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/compat 92 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/_testing.py 96 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/_config 100 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/tseries 140 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/__pycache__ 160 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/util 472 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/plotting 2252 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/io 7360 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/core 16364 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/_libs 20060 /opt/conda/envs/myproject/lib/python3.6/site-packages/pandas/tests ``` The feature-request is that a default `pandas` install would exclude `pandas.tests` and a `pandas[tests]` install would include that package. The general pattern is that production dependencies (requirements.txt) would use `pandas` and any dev/test/CI dependencies (requirements_dev.txt) would add the optional extra for `pandas[tests]`.
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MDExOlB1bGxSZXF1ZXN0NTEzMzE3NTc3
37,527
TYP: use typing.final in indexes.base
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2
2020-10-30T22:42:01Z
2020-11-01T14:47:59Z
2020-11-01T13:56:23Z
MEMBER
null
cc @simonjayhawkins this imports final conditionally following how you did it with Literal
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2020-10-31T02:25:13Z
2020-12-06T14:04:51Z
2020-10-31T23:21:04Z
MEMBER
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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MDU6SXNzdWU3MzM2OTE5NTE=
37,533
ENH: Set index to Series.name returned from DataFrame.apply's callback
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2020-10-31T10:49:09Z
2021-02-11T07:48:15Z
null
NONE
null
#### Is your feature request related to a problem? Function passed to `DataFrame.apply` with `axis=1` receives `Series` with the `name` corresponding to the row's index. Unfortunately, this doesn't work the other way around - returning a `Series` from the applied function does not change the row's index in dataframe to `Series`'s name. #### Describe the solution you'd like If returned `Series` has a name, set it as a row's or column's index, depending on `axis` (similarly as it works with 'index', but on the other axis). #### API breaking implications This changes established behavior, but I assume people don't specify name if they don't have to. And if someone would return the `Series` given in parameter, this wouldn't change indices, as they would be simply the same. #### Describe alternatives you've considered I haven't found any other mean of setting the index in `apply`, which an option would be very useful to me. #### Additional context Example: ```python >>> df = pd.DataFrame([[1,2],[3,4],[5,6]], columns=['A', 'B']) >>> df A B 0 1 2 1 3 4 2 5 6 >>> df.apply(lambda row: pd.Series(row, name=row.A+row.B), axis=1) A B 3 1 2 7 3 4 11 5 6 ```
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BUG: error raise when column contains percentage
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5
2020-10-31T13:44:42Z
2020-12-22T16:50:06Z
2020-12-22T13:57:18Z
CONTRIBUTOR
null
- [x] closes #37157 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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CI: revert disable of windows window/moments tests
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8
2020-10-31T14:21:07Z
2021-10-30T14:10:06Z
2021-10-30T14:10:06Z
CONTRIBUTOR
null
Here we disable collection of the windowing tests *only* on windows: https://github.com/pandas-dev/pandas/pull/37455 let's see if we an figure out where this is coming on. cc @mroeschke @AlexKirko @jbrockmendel
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#37535 pandas-CI: revert disable of windows window tests
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2020-10-31T15:03:06Z
2020-10-31T18:54:39Z
2020-10-31T18:54:39Z
CONTRIBUTOR
null
- [x] closes #37535 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry removed the restrictions on windows test
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Backport PR #37520 on branch 1.1.x (DOC: Start v1.1.5 release notes)
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0
2020-10-31T15:13:59Z
2020-10-31T18:25:26Z
2020-10-31T18:25:26Z
NONE
null
Backport PR #37520: DOC: Start v1.1.5 release notes
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733,746,235
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37,538
TST: split up tests/plotting/test_frame.py into subdir & modules #34769
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2020-10-31T15:38:12Z
2020-11-05T21:18:37Z
2020-11-05T21:18:24Z
CONTRIBUTOR
null
- [ ] closes #34769 - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry I moved the file to a new directory. What is the best structure for this folder?
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37,539
CI Move unwanted typing checks to pre-commit
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2
2020-10-31T18:03:26Z
2020-11-04T11:03:01Z
2020-11-04T11:01:26Z
MEMBER
null
There's still some grep-based checks left, but running doctests / running mypy can stay in code_checks
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TYP: PoC for honest ABC
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5
2020-10-31T18:38:26Z
2020-11-08T15:11:08Z
2020-11-06T22:17:55Z
MEMBER
null
PoC implementation for using honest ABCs for pandas objects. Currently only implements ABCNDFrame. Compare: ``` def foo(obj: ABCNDFrame): reveal_type(obj.attrs) def bar(obj: ABCDataFrame): reveal_type(obj.attrs) ``` In this PR, mypy will output `Revealed type is 'builtins.dict[Union[typing.Hashable, None], Any]'` for the former whereas the latter is `Revealed type is 'Any'`. A script can be written (and I plan to, if this idea gets buy-in) to generate the ABC class off of the concrete class. Likewise, tests can be written to ensure that ABCNDFrame and NDFrame don't diverge. docstrings can be removed from the ABC class; I just wanted to highlight that we could just have the docs in the ABC class (don't know if that would be desirable). cc @simonjayhawkins, @jreback, @jbrockmendel
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REF: make EA reductions, nanops funcs keyword-only
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2020-10-31T19:30:48Z
2020-11-01T00:03:02Z
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DOC Add note about virtualenv and conda
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2020-10-31T20:39:14Z
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xref https://github.com/pandas-dev/pandas/pull/37023#issuecomment-716591356
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733,802,908
MDExOlB1bGxSZXF1ZXN0NTEzNDk0MzUw
37,543
Added example to the aggregate function
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2
2020-10-31T20:36:47Z
2020-11-01T06:10:25Z
2020-11-01T05:02:52Z
NONE
null
Added example of k-hot encoding to the aggregate function - [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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37,544
BUG: Agg and Apply with custom function improperly ignore column labels when function returns a dict-like
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3
2020-10-31T20:56:10Z
2020-11-04T23:47:59Z
2020-11-04T23:47:59Z
NONE
null
Hello folks! I've discovered an odd corner case regression that I hope can be fixed. The problem is that if you are running an aggregation/apply on a dataframe using a custom function - if that function returns a dict-like object, it doesn't use the appropriate column labels in the original dataframe. As a simple replication ```{python} df = pd.DataFrame([[1, 2, 3], [4, 5, 6], [7, 8, 9], [np.nan, np.nan, np.nan]], columns=['A', 'B', 'C']) print(df.agg(lambda x : {"sum" :np.sum(x)})) ``` prints ``` 0 {'sum': 12.0} 1 {'sum': 15.0} 2 {'sum': 18.0} ``` instead of the expected ``` A {'sum': 12.0} B {'sum': 15.0} C {'sum': 18.0} ``` This is a regression/breaking change since in prior versions of pandas (I believe 1.0.X and earlier) the expected results were produced.
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37,545
REF: Categorical.is_dtype_equal -> categories_match_up_to_permutation
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2020-10-31T21:21:37Z
2020-11-02T22:48:23Z
2020-11-02T22:39:27Z
MEMBER
null
- [ ] closes #xxxx - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry There are too many notions of CategoricalDtype equality. This gives a clearer name to one of them.
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37,546
ENH: Add dtype argument to read_sql_query (GH10285)
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2020-10-31T21:44:46Z
2020-12-23T23:50:52Z
2020-12-23T23:28:23Z
CONTRIBUTOR
null
- [x] closes #10285 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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ENH: Improve error reporting for wrong merge cols
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2020-10-31T22:05:53Z
2020-11-08T12:06:18Z
2020-11-08T03:08:00Z
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- [x] closes #16228 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry Fixed error reporting when double conditions are given. Additionally I found, that something like ``` left = DataFrame({"a": [1, 2], "b": [3, 4]}) right = DataFrame({"a": [1, 1], "c": [5, 6]}) pd.merge(left, right, right_on="a") ``` raised an uncontrolled error: ``` Traceback (most recent call last): File "/home/developer/.config/JetBrains/PyCharm2020.2/scratches/scratch_4.py", line 25, in <module> print(pd.merge(left, right, right_on="a")) File "/home/developer/PycharmProjects/pandas/pandas/core/reshape/merge.py", line 72, in merge op = _MergeOperation( File "/home/developer/PycharmProjects/pandas/pandas/core/reshape/merge.py", line 643, in __init__ self._validate_specification() File "/home/developer/PycharmProjects/pandas/pandas/core/reshape/merge.py", line 1247, in _validate_specification if len(self.right_on) != len(self.left_on): TypeError: object of type 'NoneType' has no len() ```
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2020-10-31T22:32:38Z
2020-11-02T00:26:48Z
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Step towards figuring out the small differences between Categorical's _validate_foo methods
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BUG: Loc changes dtype when condition is completly False
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2020-10-31T23:21:20Z
2021-08-14T04:32:05Z
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- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [x] (optional) I have confirmed this bug exists on the master branch of pandas. --- **Note**: Please read [this guide](https://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports) detailing how to provide the necessary information for us to reproduce your bug. #### Code Sample, a copy-pastable example ```python df = pd.DataFrame({ "a": ["a"], "b": [1], "c": [1] }) df.loc[[False], ["b"]] = 10 - df["c"] print(df) ``` Thus converts ``b`` to float and returns ``` a b c 0 a 1.0 1 ``` #### Problem description [this should explain **why** the current behaviour is a problem and why the expected output is a better solution] #### Expected Output Would expect that this returns an integer. ``` a b c 0 a 1 1 ``` Interestingly, this is returned if we drop the column ``a``. ``` df = pd.DataFrame({ "b": [1], "c": [1] }) df.loc[[False], ["b"]] = 10 - df["c"] print(df) ``` or if we are not using df["c"] and an integer instead. ``` df = pd.DataFrame({ "a": ["a"], "b": [1], "c": [1] }) df.loc[[False], ["b"]] = 10 - 1 print(df) ``` Both return ``1`` instead of ``1.0`` for column ``b`` Edit: The condition [False] is just a simplification. This also happens if we use a condition, which evaluates sometimes to completly False based on the input data. #### Output of ``pd.show_versions()`` <details> master </details>
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REF: simplify Index.take, MultiIndex.take
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37,552
implemented additionally functionality of formatters_col in to_latex
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2020-11-01T02:40:50Z
2021-02-11T01:41:48Z
2021-02-11T01:41:47Z
NONE
null
- [ x] closes #26278 - [ x] tests added / passed - [ x ] passes `black pandas` - [ x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ x] whatsnew entry Was having some issues rebasing on https://github.com/pandas-dev/pandas/pull/32666 so making a new PR with same changes. Closing other PR as well.
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MDU6SXNzdWU3MzM4NjkyMTQ=
37,553
BUG: Improve error message when casting ExtensionDtype to datetime
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3
2020-11-01T04:55:49Z
2021-08-31T23:32:33Z
2021-08-31T23:32:33Z
MEMBER
null
We support casting `int` and `float` dtypes to `DatetimeTZDtype`: ``` python In [11]: s = pd.Series(np.random.randint(10, size=3), dtype="int64") ...: s.astype(pd.DatetimeTZDtype(tz="US/Pacific")) Out[11]: 0 1969-12-31 16:00:00.000000004-08:00 1 1969-12-31 16:00:00.000000007-08:00 2 1969-12-31 16:00:00.000000001-08:00 dtype: datetime64[ns, US/Pacific] ``` We should be able to do this with the corresponding extension dtypes (`Int`/`Float`). Currently this errors: ``` python In [12]: s = pd.Series(np.random.randint(10, size=5), dtype="Int64") ...: s.astype(pd.DatetimeTZDtype(tz="US/Pacific")) --------------------------------------------------------------------------- TypeError Traceback (most recent call last) <ipython-input-12-469a4b536444> in <module> 1 s = pd.Series(np.random.randint(10, size=5), dtype="Int64") ----> 2 s.astype(pd.DatetimeTZDtype(tz="US/Pacific")) /workspaces/pandas-arw2019/pandas/core/generic.py in astype(self, dtype, copy, errors) 5797 else: 5798 # else, only a single dtype is given -> 5799 new_data = self._mgr.astype(dtype=dtype, copy=copy, errors=errors) 5800 return self._constructor(new_data).__finalize__(self, method="astype") 5801 /workspaces/pandas-arw2019/pandas/core/internals/managers.py in astype(self, dtype, copy, errors) 620 self, dtype, copy: bool = False, errors: str = "raise" 621 ) -> "BlockManager": --> 622 return self.apply("astype", dtype=dtype, copy=copy, errors=errors) 623 624 def convert( /workspaces/pandas-arw2019/pandas/core/internals/managers.py in apply(self, f, align_keys, ignore_failures, **kwargs) 422 applied = b.apply(f, **kwargs) 423 else: --> 424 applied = getattr(b, f)(**kwargs) 425 except (TypeError, NotImplementedError): 426 if not ignore_failures: /workspaces/pandas-arw2019/pandas/core/internals/blocks.py in astype(self, dtype, copy, errors) 608 if self.is_extension: 609 try: --> 610 values = self.values.astype(dtype) 611 except (ValueError, TypeError): 612 if errors == "ignore": /workspaces/pandas-arw2019/pandas/core/arrays/integer.py in astype(self, dtype, copy) 471 na_value = lib.no_default 472 --> 473 return self.to_numpy(dtype=dtype, na_value=na_value, copy=False) 474 475 def _values_for_argsort(self) -> np.ndarray: /workspaces/pandas-arw2019/pandas/core/arrays/masked.py in to_numpy(self, dtype, copy, na_value) 222 data[self._mask] = na_value 223 else: --> 224 data = self._data.astype(dtype, copy=copy) 225 return data 226 TypeError: data type not understood ``` We should get this to work for both `ExtensionArray` and the masked versions.
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37,554
ENH: implement concat for EAs
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2
2020-11-01T05:19:19Z
2020-11-09T22:29:11Z
null
MEMBER
null
Currently `pd.concat` doesn't accept `ExtensionArrays`: ``` python In [3]: a = pd.array([1, 2], dtype='Int64') ...: b = pd.array([3, 4], dtype='Int64') In [4]: pd.concat([a, b]) --------------------------------------------------------------------------- TypeError Traceback (most recent call last) <ipython-input-4-714da278d09e> in <module> ----> 1 pd.concat([a, b]) /workspaces/pandas-arw2019/pandas/core/reshape/concat.py in concat(objs, axis, join, ignore_index, keys, levels, names, verify_integrity, sort, copy) 273 ValueError: Indexes have overlapping values: ['a'] 274 """ --> 275 op = _Concatenator( 276 objs, 277 axis=axis, /workspaces/pandas-arw2019/pandas/core/reshape/concat.py in __init__(self, objs, axis, join, keys, levels, names, ignore_index, verify_integrity, copy, sort) 358 "only Series and DataFrame objs are valid" 359 ) --> 360 raise TypeError(msg) 361 362 # consolidate TypeError: cannot concatenate object of type '<class 'pandas.core.arrays.integer.IntegerArray'>'; only Series and DataFrame objs are valid ``` We should make this work for both base EAs and the masked versions. For example: ``` python In [5]: a = pd.array([pd.NA, 1], dtype='Int64') ...: b = pd.array([1, pd.NA], dtype='Int64') ...: pd.concat([a, b]) ```
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37,555
Fixed the documentation for pandas.DataFrame.set_index inplace parameter
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2020-11-01T06:33:52Z
2020-11-17T17:27:47Z
2020-11-17T17:27:37Z
CONTRIBUTOR
null
Fixed the documentation for `pandas.DataFrame.set_index` 's `inplace` parameter. Added proper explanation for True case.
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37,556
TYP: Check untyped defs (except vendored)
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2020-11-01T11:27:00Z
2020-11-09T13:21:17Z
2020-11-09T12:51:09Z
MEMBER
null
@jbrockmendel has recently addressed many of the modules that were not previously checked. There are now many less modules outstanding. There has been a concern in the past that if we add ignores, the issues may not be addressed and sit in the codebase. (from previous experience with other linting tools) There are however pros to including the ignores. The issues are visible to people working on the relevant code and when reviewing the code. **Also as mypy will be checking the relevant modules, PRs changing these modules will have additional static checking on ci and the chance of regression/errors is likely reduced.** IMO the pros always outweighed the cons, but now that there are less ignores involved (admittedly the number is still not trivial), I think it is appropriate to reconsider this approach. One caveat, NumPy types currently resolve to `Any` and we have not yet discussed how we will 'switch' to using NumPy types #36092. (reverting to using `check_untyped_defs=False` on some modules could make the switch more managable) Another possible upside, is in the review of typing PRs to fix these issues. Reviewers of typing PRs cannot see explicitly see why changes are being made and a typical reviewer is normally suspicious of any changes to the codebase. This can lead to long review cycles of typing PRs. I'm not sure if having the resolved mypy errors in the diff will help, but if the hypothesis is correct could be an argument for following a similar approach for resolving the numerous errors that will be reported once NumPy types no longer resolve to `Any`
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37,557
ENH: Improve numerical stability for window functions skew and kurt
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2020-11-01T13:51:37Z
2020-11-09T21:44:11Z
2020-11-09T21:20:06Z
MEMBER
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- [x] closes #6929 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry Used the same procedure as in ``DataFrame.skew()``
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ENH: extend DataFrame.insert to also insert rows
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2020-11-01T14:35:20Z
2021-05-31T13:12:52Z
2021-05-31T13:12:51Z
NONE
null
#### Is your feature request related to a problem? I wish I could use pandas to directly insert a row at a specific position in a data frame, just like I can insert a column via the `DataFrame.insert` method. This would be similar to the [add_row](https://tibble.tidyverse.org/reference/add_row.html) function that exist for R data frames. #### Describe the solution you'd like expand the functionality of `DataFrame.insert` to take an axis argument and allow for the insertion of rows when `axis` is set to `0`. #### API breaking implications as `insert` currently inserts a column by default, the default argument to `axis` should be set to `1`. When this is done, I don't foresee any breaks. #### Describe alternatives you've considered An alternative is to use concatenate. This is tedious though, because it requires several concat operations (upper block + row to insert + lower block) and error prone. Another alternative (not in-place) is to use `np.insert` like ```python import seaborn as sns import pandas as pd import numpy as np def insert_row(df, row, position): out = pd.DataFrame(np.insert(arr=df.values, obj=position, values=row, axis=0), columns=df.columns) return out iris = sns.load_dataset("iris") row_to_insert = iris.iloc[1, :] insert_row(iris, row_to_insert, 1) ``` #### Additional context Code example to insert column: ```python import seaborn as sns iris = sns.load_dataset("iris") col_to_insert = iris.iloc[:, 1] position_to_insert = 1 iris.insert(position_to_insert, "new_column", col) ``` Desired behaviour: ```python row_to_insert = iris.iloc[1, :] iris.insert(position_to_insert, "new_row", row, axis=0) ```
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2020-11-01T16:10:09Z
2020-12-30T08:10:29Z
2020-11-10T03:38:05Z
CONTRIBUTOR
null
- [x] closes #25113, closes https://github.com/pandas-dev/pandas/issues/36745 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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REF: move _wrap_joined_index up to NDarrayBackedExtensionIndex
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2020-11-02T15:12:42Z
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MEMBER
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Small steps towards a) supporting arbitrary ExtensionIndex b) using `@final` more in index code
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REF: move IntervalIndex.equals up to ExtensionIndex.equals
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2020-11-01T17:54:23Z
2020-11-02T00:27:21Z
2020-11-02T00:22:09Z
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null
When moving to the always-go-split_path, a bunch of tests fail without this fix.
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37,563
CLN: remove redundant variable in setitem_with_indexer
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2020-11-01T19:19:55Z
2020-11-04T08:07:23Z
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- [x] closes #35719 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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2020-11-01T19:22:44Z
2021-07-11T23:30:59Z
2021-07-11T23:30:59Z
CONTRIBUTOR
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Currently, to see columns with unique values, we have to do `df.apply(lambda x: x.is_unique)`, which is a bit awkward. IMO checking for unique columns in a DataFrame is a common enough need to justify a method for that specific purpose. Xref: #11948
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BUG: nunique not ignoring both None and np.nan
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1
2020-11-01T21:47:38Z
2020-11-10T23:41:47Z
2020-11-10T23:41:47Z
NONE
null
- [x] I have checked that this issue has not already been reported. - [ ] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. --- **Note**: Please read [this guide](https://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports) detailing how to provide the necessary information for us to reproduce your bug. #### Code Sample, a copy-pastable example ```python import pandas as pd import numpy as np pd.Series(['yes','yes', None, np.nan]).nunique(dropna = True) ``` #### Problem description The output was 2. It seems that nunique can only ignore None or np.nan but not both together. This seems odd to me and I think it should either be changed or the docs should reflect this. #### Expected Output I expected to get 1 as the result but I got 2. #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : db08276bc116c438d3fdee492026f8223584c477 python : 3.7.6.final.0 python-bits : 64 OS : Linux OS-release : 5.4.49+ Version : #1 SMP Sun Oct 18 19:43:35 PDT 2020 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : C.UTF-8 LANG : C.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.1.3 numpy : 1.18.5 pytz : 2019.3 dateutil : 2.8.1 pip : 20.2.4 setuptools : 46.1.3.post20200325 Cython : 0.29.21 pytest : 5.4.1 hypothesis : 5.10.0 sphinx : 3.0.2 blosc : None feather : 0.4.1 xlsxwriter : 1.2.8 lxml.etree : 4.5.0 html5lib : 1.0.1 pymysql : None psycopg2 : None jinja2 : 2.11.2 IPython : 7.13.0 pandas_datareader: 0.9.0 bs4 : 4.9.0 bottleneck : 1.3.2 fsspec : 0.8.4 fastparquet : None gcsfs : 0.6.1 matplotlib : 3.2.1 numexpr : 2.7.1 odfpy : None openpyxl : 3.0.3 pandas_gbq : None pyarrow : 0.16.0 pytables : None pyxlsb : None s3fs : 0.5.1 scipy : 1.4.1 sqlalchemy : 1.3.16 tables : 3.6.1 tabulate : 0.8.7 xarray : 0.16.1 xlrd : 1.2.0 xlwt : 1.3.0 numba : 0.48.0 </details>
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37,567
CLN: de-duplicate asof_locs
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3
2020-11-01T21:48:15Z
2020-11-02T14:30:26Z
2020-11-02T13:38:13Z
MEMBER
null
We might want to deprecate allowing DatetimeIndex `where` in `PeriodIndex.asof_locs`. We only have one test for it, and allowing it is inconsistent with how we treat other comparisons (unless we want to start allowing dt64 in PeriodArray.searchsorted...)
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37,568
BUG: Fix bug in combine_first with string dtype and only NA
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1
2020-11-01T22:11:31Z
2020-12-13T19:29:30Z
2020-11-02T00:42:22Z
MEMBER
null
- [x] closes #37519 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry This caused bugs in ``Index.union()`` and ``Index.join()`` with ``how=outer`` too, but they are called from combine_first. Could add test, if this would be preferable. Hope Adding ExtensionArray to the if condition does not crash anything else. Run most categorical tests already locally.
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37,569
PERF: faster numeric indexes comparisons when self is identical to other
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1
2020-11-01T22:11:40Z
2021-01-01T22:13:54Z
2020-11-02T00:32:18Z
CONTRIBUTOR
null
Further performance improvement over #37130, this time improving all numeric indexes. The improvement is larger for `Int64Index`, because that doesn't need to check for `na` values. Examples: ```python >>> n = 100_000 >>> idx1 = pd.Int64Index(range(n)) >>> idx2 = idx1.view() >>> %timeit idx1 == idx2 145 µs ± 2.43 µs per loop # master 11.4 µs ± 290 ns per loop # this PR >>> idx3 = pd.Float64Index(range(n)) >>> idx4 = idx3.view() >>> %timeit idx3 == idx4 104 µs ± 2.12 µs per loop # master 49.8 µs ± 886 ns per loop # this PR ```
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37,570
TST: avoid/suppress DeprecationWarnings
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0
2020-11-01T22:43:18Z
2020-11-02T01:09:51Z
2020-11-02T00:28:19Z
MEMBER
null
After this, all thats left for me locally is plotting warnings about multiple subplots
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37,571
BUG: to_dict should return a native datetime object for NumPy backed dataframes
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3
2020-11-01T23:27:18Z
2020-11-04T23:50:47Z
2020-11-04T23:50:34Z
MEMBER
null
- [x] closes #21256 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry Added a fix for datetime. Added tests for datetime and for bool
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37,572
ENH: df.assign() should accept a quoted name
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1
2020-11-01T23:42:08Z
2020-11-02T00:20:25Z
2020-11-02T00:20:03Z
NONE
null
#### Is your feature request related to a problem? I believe that `df.assign()` should permit creation of columns using quoted names. Note, this feature request is not because I am a masochist and prefer having non-syntactic (spaces, funny characters, etc..) column names, but to maintain consistency across the pandas ecosystem (see additional context). The code in question: ``` import pandas as pd df = pd.DataFrame({'temp_c': [17.0, 25.0]}, index=['Portland', 'Berkeley']) df.assign(temp_f=lambda x: x.temp_c * 9 / 5 + 32) ``` #### Describe the solution you'd like It should (also?) work like this: ``` df.assign('temp_f'=lambda x: x.temp_c * 9 / 5 + 32) ``` #### API breaking implications I am not sure what limitations this might have... #### Describe alternatives you've considered Suck it up, [take the blue pill](https://en.wikipedia.org/wiki/Red_pill_and_blue_pill) and start using `df.assign(temp_f=...` #### Additional context **This mini-discussion can likely be ignored** as I am sure the response to it will be that it's a "personal preference". I certainly do not have the clout to making such statements but I am including them here "for the record" 🙂. <details> Data frame columns can be accessed using: `df['HP']` or `df.HP` I have always taught my students to do `df['HP']` because it: - makes you think about what you're doing more, - permits sensible method chaining, - improves readability and clearly differentiates column names from other actions - is overall less error prone More so, I think it just feels like the "right way to do things". I am dreaming of the day when one day, `df.HP` is deprecated but it sounds like that is not on the horizon... My favourite (contrived) example of this is if you had a data frame with a column called "mean", `df.mean` gives a somewhat surprising result. </details>
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37,573
TST/REF: collect tests by method
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0
2020-11-02T00:07:52Z
2020-11-02T14:29:53Z
2020-11-02T13:39:08Z
MEMBER
null
This is something of an outlier in that it collects iter/iteritems/iterrows/itertuples into a test_iteration file. I think this is a sufficiently clear grouping, akin to test_arithmetic/test_reductions/test_unary, LMK if you disagree.
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37,574
BUG: series max aggregate function throws a TypeError.
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2020-11-02T03:38:08Z
2021-08-14T04:43:28Z
2021-08-14T04:43:28Z
CONTRIBUTOR
null
- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [x] (optional) I have confirmed this bug exists on the master branch of pandas. --- #### Code Sample, a copy-pastable example ```python import pandas as pd series = pd.Series(['2018-01-01', None]) print(series.max()) ``` #### Problem description The max function skipna parameter defaults to true, which means that the current series only has ["2018-01-01"] when the comparison is actually done, so the max should be 2018-01-01, but an exception is thrown here. The main error messages: `TypeError: '>=' not supported between instances of 'str' and 'float'` I debugged the source code and found that the line `nanmax = _nanminmax("max", fill_value_typ="-inf")` converts None to inf by default, which ends up comparing the type types #### Expected Output 2018-01-01 #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : 821f90c23e88561d6741714428b24c8cd3a21b25 python : 3.8.6.final.0 python-bits : 64 OS : Darwin OS-release : 19.6.0 Version : Darwin Kernel Version 19.6.0: Mon Aug 31 22:12:52 PDT 2020; root:xnu-6153.141.2~1/RELEASE_X86_64 machine : x86_64 processor : i386 byteorder : little LC_ALL : en_US.UTF-8 LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.2.0.dev0+1025.g821f90c23 numpy : 1.19.2 pytz : 2020.1 dateutil : 2.8.1 pip : 20.2.1 setuptools : 49.2.1 Cython : 0.29.21 pytest : 6.1.1 hypothesis : 5.37.4 sphinx : 3.2.1 blosc : 1.9.2 feather : None xlsxwriter : 1.3.7 lxml.etree : 4.6.1 html5lib : 1.1 pymysql : None psycopg2 : None jinja2 : 2.11.2 IPython : 7.18.1 pandas_datareader: None bs4 : 4.9.3 bottleneck : 1.3.2 fsspec : 0.8.4 fastparquet : 0.4.1 gcsfs : 0.7.1 matplotlib : 3.3.2 numexpr : 2.7.1 odfpy : None openpyxl : 3.0.5 pandas_gbq : None pyarrow : 2.0.0 pyxlsb : None s3fs : 0.5.1 scipy : 1.5.3 sqlalchemy : 1.3.20 tables : 3.6.1 tabulate : 0.8.7 xarray : 0.16.1 xlrd : 1.2.0 xlwt : 1.3.0 numba : 0.51.2 </details>
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DOC: Add windows.rst
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1
2020-11-02T04:30:53Z
2020-11-14T21:16:14Z
2020-11-14T16:56:36Z
MEMBER
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Adding a dedicated `user_guide/windows.rst` for `rolling/expanding/ewm` operations. Mainly ported over from `computation.rst`.
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QST: Seems inconsistent behavior in MultiIndex.is_monotonic ??
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2020-11-02T07:45:03Z
2020-11-03T13:30:38Z
2020-11-03T13:30:38Z
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null
#### Question about pandas In the example below, I have no idea why their results are different in pandas 1.1.4. ```python >>> pd.MultiIndex.from_tuples([('x', 'a'), ('y', 'b'), ('y', 'b'), ('z', 'a')]).is_monotonic True >>> pd.MultiIndex.from_tuples([('x', 'a'), ('y', 'b'), ('y', 'a'), ('z', 'a')]).is_monotonic False ``` Is it intended behavior in pandas 1.1.4. or seems like bug ?? If this is a bug, which one is correct behavior ?? Thanks :)
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ENH: DataFrame Constructions from Data Classes
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2020-11-02T08:19:05Z
2020-11-08T08:45:17Z
2020-11-05T15:40:49Z
NONE
null
#### Is your feature request related to a problem? I wish to construct `pandas.DataFrame` from iterable of `dataclasses.dataclass` as from iterable of tuples `DataFrame.from_records`. The rationale behind is that data classes is more typed object than general tuple or dictionary. Also, data classes more memory efficient than `tuple`'s. It makes data classes attractive to use them instead of `dict`'s or `tuple`'s whenever schema is known. #### Describe the solution you'd like I would like class method `.from_dataclasses` which allows `DataFrame` construction and type inference from uniform (for simplicity) sequence of data classes. See example below. ```python import pandas as pd from dataclasses import dataclass @dataclass class Record: id: int name: str constant: float df = pd.DataFrame.from_dataclasses([ Record(0, 'Landau', 3.1415926), Record(1, 'Kapitsa', 2.718281828459045), Record(2, 'Bogolyubov', 6.62607015), ]) print(df.dtypes) # id int64 # name object # constant float64 # dtype: object ```` In the example above schema of `DataFrame` is infered with `Record.__annotations__` dictionary which contains type user provided type information. API could also provide ways to validate schema in runtime by comparying type of actual type and specified type for a column. #### API breaking implications There is no API breaking in general but there is requirements to minimum Python version (which is 3.7).
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2020-11-02T11:09:14Z
2020-11-02T14:56:58Z
2020-11-02T13:04:17Z
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I tried applying https://sourcery.ai/github/ , seems like there's some nice suggestions here. I removed the ones where they change things like ```diff - if param: - var = a - else: - var = b + var = a if param else b ```
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refactor core
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2020-11-02T11:31:33Z
2020-11-02T11:43:04Z
2020-11-02T11:43:04Z
MEMBER
null
Some refactorings found by Sourcery https://sourcery.ai/ I've removed the ones of the kind ```diff - if param: - var = a - else: - var = b + var = a if param else b ```
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2020-11-02T11:33:59Z
2020-11-03T08:14:17Z
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Some refactorings found by Sourcery https://sourcery.ai/ I've removed the ones of the kind ```diff - if param: - var = a - else: - var = b + var = a if param else b ```
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2020-11-02T11:40:44Z
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2020-11-02T14:14:55Z
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Some refactorings found by Sourcery https://sourcery.ai/ I've removed the ones of the kind ```diff - if param: - var = a - else: - var = b + var = a if param else b ```
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Some refactorings found by Sourcery https://sourcery.ai/ I've removed the ones of the kind ```diff - if param: - var = a - else: - var = b + var = a if param else b ```
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2020-11-02T15:03:04Z
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TST/REF: collect indexing tests by method
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2020-11-02T15:36:20Z
2020-11-02T21:47:52Z
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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BUG: Index.where casting ints to str
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3
2020-11-02T15:48:14Z
2020-11-03T02:51:44Z
2020-11-03T02:47:21Z
MEMBER
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- [ ] closes #xxxx - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry Two things going on here (can separate if asked, but they got mixed together in the process). 1) don't re-raise in `DatetimeLikeIndexMixin.where`, so we end up giving the more standard exception message. 2) Use validate_fill_value in Index.where, and have that disallow strs for numeric. This fixes the following in master: ``` >>> idx = pd.Index(range(3)) >>> mask = np.array([True, False, True]) >>> >>> idx.where(mask, "2") Index(['0', '2', '2'], dtype='object') ```
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ENH: pandas.Timestamp.round infer correct timezone around DST
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2020-11-02T16:05:49Z
2020-11-05T00:14:43Z
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- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [x] (optional) I have confirmed this bug exists on the master branch of pandas. --- **Note**: Please read [this guide](https://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports) detailing how to provide the necessary information for us to reproduce your bug. #### Code Sample, a copy-pastable example ```python import pandas as pd from datetime import timedelta as td test_ts = pd.Timestamp('2020-11-02 05:00:01.167', tz='UTC') lt_ts = test_ts.tz_convert('America/New_York') lt_ts # Timestamp('2020-11-02 00:00:01.167000-0500', tz='America/New_York') lt_ts -= td(days=1) lt_ts # Timestamp('2020-11-01 01:00:01.167000-0400', tz='America/New_York') lt_ts.round(freq='H') Traceback (most recent call last): File "<input>", line 1, in <module> File "pandas/_libs/tslibs/timestamps.pyx", line 1145, in pandas._libs.tslibs.timestamps.Timestamp.round File "pandas/_libs/tslibs/timestamps.pyx", line 1099, in pandas._libs.tslibs.timestamps.Timestamp._round File "pandas/_libs/tslibs/timestamps.pyx", line 1317, in pandas._libs.tslibs.timestamps.Timestamp.tz_localize File "pandas/_libs/tslibs/tzconversion.pyx", line 63, in pandas._libs.tslibs.tzconversion.tz_localize_to_utc_single File "pandas/_libs/tslibs/tzconversion.pyx", line 275, in pandas._libs.tslibs.tzconversion.tz_localize_to_utc pytz.exceptions.AmbiguousTimeError: Cannot infer dst time from 2020-11-01 01:00:00, try using the 'ambiguous' argument ``` #### Problem description pandas.Timestamp.round method crashes. #### Expected Output ```python Timestamp('2020-11-01 01:00:00.0000-0400', tz='America/New_York') ``` #### Output of ``pd.show_versions()`` <details> pd.show_versions() INSTALLED VERSIONS ------------------ commit : 67a3d4241ab84419856b84fc3ebc9abcbe66c6b3 python : 3.8.5.final.0 python-bits : 64 OS : Linux OS-release : 5.4.0-52-generic Version : #57-Ubuntu SMP Thu Oct 15 10:57:00 UTC 2020 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_GB.UTF-8 LOCALE : en_GB.UTF-8 pandas : 1.1.4 numpy : 1.19.2 pytz : 2020.1 dateutil : 2.8.1 pip : 20.2.3 setuptools : 50.3.0 Cython : None pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : 2.8.3 (dt dec pq3 ext lo64) jinja2 : 2.11.2 IPython : None pandas_datareader: None bs4 : None bottleneck : None fsspec : None fastparquet : None gcsfs : None matplotlib : 3.3.1 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pyxlsb : None s3fs : None scipy : 1.5.2 sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None numba : None </details>
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37,593
BUG: DataFrame iloc does not accept Series assignment
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10
2020-11-02T16:40:39Z
2021-10-17T13:44:02Z
2020-11-19T00:22:07Z
NONE
null
- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. --- #### Code Sample, a copy-pastable example ```python df = pd.DataFrame(columns=[0], index=[0]) df.iloc[0,0] = pd.Series([1,2,3]) # this raises a ValueError df.iloc[0] = [pd.Series([1,2,3])] # this works, but is ugly ``` #### Problem description When trying to assign a pandas.Series to one cell of a pandas.DataFrame, the following error is raised: `ValueError: Incompatible indexer with Series` Series in DataFrames are a common thing e.g. in sktime, when working with multivariate time series data and (as the working example above shows) it is unproblematically supported by pandas. Just the assignment to one cell via .iloc seems to be erroneous. <details> INSTALLED VERSIONS ------------------ commit : db08276bc116c438d3fdee492026f8223584c477 python : 3.8.5.final.0 python-bits : 64 OS : Windows OS-release : 10 Version : 10.0.18362 machine : AMD64 processor : Intel64 Family 6 Model 61 Stepping 4, GenuineIntel byteorder : little LC_ALL : None LANG : None LOCALE : de_DE.cp1252 pandas : 1.1.3 numpy : 1.19.2 pytz : 2020.1 dateutil : 2.8.1 pip : 20.2.4 setuptools : 50.3.0.post20201006 Cython : None pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 2.11.2 IPython : 7.18.1 pandas_datareader: None bs4 : None bottleneck : None fsspec : None fastparquet : None gcsfs : None matplotlib : 3.3.1 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pyxlsb : None s3fs : None scipy : 1.5.0 sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None numba : None </details>
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37,594
API: Should Index.where/insert raise or cast on invalid other?
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2020-11-02T18:07:35Z
2020-11-03T20:50:25Z
2020-11-02T19:25:27Z
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Index.where ATM `index.where(mask, something_incompatible)` raises for EA-backed indexes and MultiIndex and casts (sometimes buggily xref #37591) for everything else. These should all do the same thing. I lean towards raising rather than casting. Doing that breaks a handful of tests, but AFAICT they are all directly testing Index.where, so not used by other parts of the code. ---- Index.insert CategoricalIndex and IntervalIndex raise on invalid, PeriodIndex casts to object, DatetimeIndex and TimedeltaIndex cast to object _only_ for strings and otherwise raise. The base class casts but uses _coerce_scalar_to_index instead of any of our more standard patterns. If changed to always raise, 25 tests fail. Most of these are directly testing Index.insert so could be changed if the API changed. The main troubling one is test_pivot_periods_with_margins, which I haven't tracked down all the way. --- Index.putmask I'm still getting a handle on
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37,595
CLN: de-duplicate _validate_where_value with _validate_setitem_value
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TST/REF: share method tests between DataFrame and Series
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1
2020-11-02T22:35:47Z
2020-11-03T02:51:11Z
2020-11-03T02:43:39Z
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By default, a test using the frame_or_series fixture goes in tests.frame
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REF: re-use _validate_setitem_value in Categorical.fillna
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WIP: Debug high memory failure window tests
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- [ ] closes #xxxx - [ ] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [ ] whatsnew entry
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CI: Use conda deactivate instead of source deactivate
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2020-11-03T04:31:07Z
2020-11-03T04:37:03Z
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Seen in the logs when running `setup_env.sh` ``` DeprecationWarning: 'source deactivate' is deprecated. Use 'conda deactivate'. ```
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BUG: DataFrame.to_json ignores index if it is repeated in the DataFrame.
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2020-11-03T09:55:29Z
2021-08-14T04:45:31Z
null
NONE
null
- [x ] I have checked that this issue has not already been reported. Similar to https://github.com/pandas-dev/pandas/issues/25513 - [x ] I have confirmed this bug exists on the latest version of pandas. - [ ] (optional) I have confirmed this bug exists on the master branch of pandas. #### Code Sample, a copy-pastable example import pandas as pd df=pd.DataFrame({'column':[0,1,2,3,4], 'probe':[0,1,2,2,3]}) df.set_index('probe',inplace=True) out = df.to_json(orient='table', index=True) assert 'primaryKey' in out ``` #### Problem description DataFrame.to_json ignores index if it is repeated in the DataFrame. Since pandas allows dataframes with repeated indexes, the function `to_json` should be able to write them. If you want to limit this functionality, at least one warning should be implemented. Note that 'to_pickle' works fine with repeated indexes, as expected. #### Expected Output Not Error in assert #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : 67a3d4241ab84419856b84fc3ebc9abcbe66c6b3 python : 3.6.6.final.0 python-bits : 64 OS : Windows OS-release : 10 Version : 10.0.19041 machine : AMD64 processor : Intel64 Family 6 Model 158 Stepping 9, GenuineIntel byteorder : little LC_ALL : None LANG : ES LOCALE : es_ES.cp1252 pandas : 1.1.4 numpy : 1.16.3 pytz : 2018.5 dateutil : 2.7.3 pip : 20.2.3 setuptools : 41.2.0 Cython : None pytest : None hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : 4.4.2 html5lib : None pymysql : None psycopg2 : None jinja2 : 2.10.3 IPython : 7.10.1 pandas_datareader: None bs4 : 4.9.1 bottleneck : None fsspec : None fastparquet : None gcsfs : None matplotlib : 2.2.3 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pytables : None pyxlsb : None s3fs : None scipy : 1.2.1 sqlalchemy : 1.3.18 tables : None tabulate : None xarray : None xlrd : None xlwt : None numba : None </details>
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DEPR: DataFrame/Series.slice_shift
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2020-11-03T12:28:07Z
2020-11-04T09:23:51Z
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CONTRIBUTOR
null
- [x] ref #18262 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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ERR: fix error message in Period for invalid frequency
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2020-11-03T14:59:02Z
2020-11-03T19:18:30Z
2020-11-03T19:18:26Z
MEMBER
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Small fix of the error message, it was missing the actual freq to fill into the message. On master, you get: ``` In [1]: pd.Period("2012-01-02", freq="WOM-1MON") ... ValueError: Invalid frequency: {0} ```
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TST: Remove stacklevel checks for deprecated resample kwargs
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2020-11-03T15:27:15Z
2020-12-18T09:09:39Z
2020-12-18T09:09:39Z
CONTRIBUTOR
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- [N/A] closes #xxxx (see https://github.com/pandas-dev/pandas/pull/36629#issuecomment-720757082) - [x] tests added / passed (tests are failing locally but on unrelated things, think it's a problem somewhere in master) - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [N/A] whatsnew entry This removes `stacklevel` requirements from the deprecation warnings for `resample` and `Grouper` kwargs in an attempt to simplify the warning-handling code (see #36629 for "why"). This only changes `tests.resample.test_deprecated`. The second commit is optional (it just extracts the deprecated argument checking code out from `Grouper.__new__` to declutter the latter); I can revert it if needed.
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0
2020-11-03T15:32:42Z
2020-11-08T02:11:13Z
2020-11-08T02:11:13Z
MEMBER
null
#### Is your feature request related to a problem? Not necessarily an issue, but one can get some code improvement and consistency in ``pandas.plotting._matplotlib.style.get_standard_colors``, when it is related to cycling colors. During refactoring of the module (#37203) it turned out that cycling the colors works in a strange (although tolerable way). ```python >>> from pandas.plotting._matplotlib.style import get_standard_colors >>> get_standard_colors(num_colors=2, color='rgb') 'rgb' >>> get_standard_colors(num_colors=3, color='rgb') 'rgb' >>> get_standard_colors(num_colors=4, color='rgb') 'rgbr' >>> ``` From the snippets above one can see that in the second and third examples work reasonable. Meanwhile, the first one returns three colors, rather than two. Extra color(s) will be ignored anyway, but in regards to the discussion in the referenced PR, the way of cycling colors can be improved https://github.com/pandas-dev/pandas/pull/37203#discussion_r516294252 #### Describe the solution you'd like I suggest using matplotlib's cycler (or other generator) to cycle through the colors obtained and get the exact number of colors required, without any extra. This will simplify the code involving colors cycling in ``get_standard_colors``. #### Expected Output ```python >>> from pandas.plotting._matplotlib.style import get_standard_colors >>> get_standard_colors(num_colors=2, color='rgb') 'rg' ``` #### API breaking implications Will break some tests related to ``get_standard_colors`` only as they expect extra colors to be returned on some occasions. #### Describe alternatives you've considered See https://github.com/pandas-dev/pandas/pull/37203 without involving modifications to color cycling.
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API: require tz equality or just tzawareness-compat in setitem-like methods?
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9
2020-11-03T16:22:21Z
2021-10-31T14:53:56Z
2021-10-31T14:53:56Z
MEMBER
null
There are a handful of methods that do casting/validation in DatetimeArray (and indirectly, Series and DatetimeIndex) methods: `__setitem__` shift insert fillna take searchsorted `__cmp__` In all cases, we upcast datetime64/datetime to Timestamp, try to parse strings, and check for tzawareness compat (i.e. raise if `(self.tz is None) ^ (other.tz is None)`) In the cases of searchsorted and cmp, we stop there, and don't require the actual timezones to match. In the other cases, we are stricter and raise if `not tz_compare(self.tz, other.tz)` In #37299 we discussed the idea of making these uniform. I am generally positive on this, as it would make things simpler both for users and in the code. cc @jorisvandenbossche @jreback Side-notes 1) `__sub__` doesn't do the same casting, but also requires tz match but _could_ get by with only tzawareness compat, xref #37329. BTW the stdlib datetime only requires tzawareness compat. 2) In `Series/DataFrame.__setitem__` we cast to object instead of raising on tz mismatch. For brevity I lump this in with "we raise on tz mismatch".
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37,606
BUG: set index of DataFrame.apply(f) when f returns dict (#37544)
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2
2020-11-03T16:51:28Z
2020-11-12T16:12:14Z
2020-11-04T23:48:00Z
CONTRIBUTOR
null
- [x] closes #37544 - [x] tests (added) updated / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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BUG: nunique not ignoring both None and np.nan
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2020-11-03T16:52:21Z
2020-11-11T17:03:30Z
2020-11-10T23:41:48Z
CONTRIBUTOR
null
- [x] closes #37566 - [x] tests added / passed - [ ] passes `black pandas` - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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CLN: remove rebox_native
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735,524,308
MDU6SXNzdWU3MzU1MjQzMDg=
37,609
BUG: pandas.testing.assert_frame_equal with check_dtype=False unexpectedly raises an exception
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3
2020-11-03T17:54:06Z
2021-02-24T15:10:18Z
2020-12-02T23:31:30Z
NONE
null
This code ``` import pandas from datetime import datetime df1 = pandas.DataFrame({'a': []}) df2 = pandas.DataFrame({'a': []}) df1['a'] = pandas.to_datetime(df1['a']) pandas.testing.assert_frame_equal(df1, df2, check_dtype=False) ``` raises: ``` AssertionError: right is not an ExtensionArray ``` But should it raise instead no exception as df1 and df2 are identical, except for their dtypes ?
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735,549,450
MDU6SXNzdWU3MzU1NDk0NTA=
37,610
BUG: pd.Timestamp loses fold when removing timezone which is inconsistent with datetime.datetime
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2
2020-11-03T18:35:51Z
2020-11-08T02:22:48Z
2020-11-08T02:22:48Z
NONE
null
- [+] I have checked that this issue has not already been reported. - [+] I have confirmed this bug exists on the latest version of pandas. I have tested on {'dirty': False, 'error': None, 'full-revisionid': '67a3d4241ab84419856b84fc3ebc9abcbe66c6b3', 'version': '1.1.4'} - [-] (optional) I have confirmed this bug exists on the master branch of pandas. --- **Note**: Please read [this guide](https://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports) detailing how to provide the necessary information for us to reproduce your bug. #### Problem description datetime.datetime saves the fold when replacing tzinfo, but pandas.Timestamp doesn't #### Code Sample, a copy-pastable example ```python import dateutil.tz import pandas from datetime import datetime as dt print(pandas.Timestamp(1256427000000000000, tz=dateutil.tz.gettz('Europe/Moscow'), unit='ns')) # Timestamp('2009-10-25 02:30:00+0300', tz='dateutil//usr/share/zoneinfo/Europe/Moscow') print(pandas.Timestamp(1256427000000000000, tz=dateutil.tz.gettz('Europe/Moscow'), unit='ns').fold) # 1 print(pandas.Timestamp(1256427000000000000, tz=dateutil.tz.gettz('Europe/Moscow'), unit='ns').replace(tzinfo=None).fold) # 0 print(dt(2009, 10, 25, 2,30, fold=1, tzinfo=dateutil.tz.gettz('Europe/Moscow')).replace(tzinfo=None).fold) # 1 ``` #### Expected Output ``` Timestamp('2009-10-25 02:30:00+0300', tz='dateutil//usr/share/zoneinfo/Europe/Moscow') 1 1 1 ``` #### Output of ``pd.show_versions()`` <details> commit : 67a3d4241ab84419856b84fc3ebc9abcbe66c6b3 python : 3.8.4.final.0 python-bits : 64 OS : Darwin OS-release : 19.5.0 Version : Darwin Kernel Version 19.5.0: Tue May 26 20:41:44 PDT 2020; root:xnu-6153.121.2~2/RELEASE_X86_64 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.1.4 numpy : 1.16.4 pytz : 2020.4 dateutil : 2.8.0 pip : 20.1.1 setuptools : 39.0.1 Cython : 3.0a6 pytest : 5.0.1 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : 2.8.3 (dt dec pq3 ext lo64) jinja2 : 2.10.1 IPython : None pandas_datareader: None bs4 : None bottleneck : None fsspec : None fastparquet : None gcsfs : None matplotlib : 3.0.3 numexpr : None odfpy : None openpyxl : 3.0.5 pandas_gbq : None pyarrow : None pytables : None pyxlsb : None s3fs : None scipy : None sqlalchemy : None tables : None tabulate : 0.8.6 xarray : None xlrd : 1.2.0 xlwt : None numba : None </details>
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37,611
Add tests for categorical with null ea as input
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1
2020-11-03T19:49:26Z
2020-11-13T13:14:46Z
2020-11-13T13:08:25Z
MEMBER
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- [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` cc @jreback Is this what you had in mind for ExtensionArrays and Categoricals?
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735,625,825
MDExOlB1bGxSZXF1ZXN0NTE0OTgzODk3
37,612
DOC: Fix punctuation
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1
2020-11-03T20:49:38Z
2020-11-04T01:58:17Z
2020-11-04T01:58:13Z
CONTRIBUTOR
null
Fixed punctuation to match others.
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BUG: read-only values in cython funcs
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3
2020-11-03T20:59:30Z
2021-09-12T05:30:38Z
2020-11-04T13:43:47Z
MEMBER
null
- [x] closes #34857 - [x] closes #37264 - [x] closes #37312 - [x] tests added / passed - [x] passes `black pandas` - [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff` - [x] whatsnew entry
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37,614
ENH: should a sequence of integers be a valid input to BooleanArray?
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3
2020-11-03T21:09:15Z
2021-08-14T04:47:11Z
null
MEMBER
null
Came across this while working on #37377 xref #28778 for potentially relevant prior discussions This works on NumPy: ``` python In [10]: np.array([0, 1, 2], dtype=bool) Out[10]: array([False, True, True]) ``` but the following fails with `BooleanArray`: ``` python In [11]: arr = pd.array([0, 1, 2], dtype="boolean") --------------------------------------------------------------------------- TypeError Traceback (most recent call last) <ipython-input-11-44c03a9227eb> in <module> ----> 1 arr = pd.array([0, 1, 2], dtype="boolean") /workspaces/pandas/pandas/core/construction.py in array(data, dtype, copy) 296 if is_extension_array_dtype(dtype): 297 cls = cast(ExtensionDtype, dtype).construct_array_type() --> 298 return cls._from_sequence(data, dtype=dtype, copy=copy) 299 300 if dtype is None: /workspaces/pandas/pandas/core/arrays/boolean.py in _from_sequence(cls, scalars, dtype, copy) 276 if dtype: 277 assert dtype == "boolean" --> 278 values, mask = coerce_to_array(scalars, copy=copy) 279 return BooleanArray(values, mask) 280 /workspaces/pandas/pandas/core/arrays/boolean.py in coerce_to_array(values, mask, copy) 176 == values_object[~mask_values].astype(float) 177 ): --> 178 raise TypeError("Need to pass bool-like values") 179 180 if mask is None and mask_values is None: TypeError: Need to pass bool-like values ``` I'm +0 on supporting NumPy-like behavior here (or we should make sure to document the current behavior)
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37,615
BUG: Hash-function doesn't take upper bits into consideration for PyObjects
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1
2020-11-03T21:33:39Z
2021-02-07T16:42:08Z
2021-02-07T16:42:08Z
CONTRIBUTOR
null
- [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the latest version of pandas. - [x] (optional) I have confirmed this bug exists on the master branch of pandas. --- #### Code Sample, a copy-pastable example ```python import pandas as pd import numpy as np def create(M, shift=0): lst=[x<<shift for x in range(M)] return np.array(lst, dtype=np.object) #linear running time: %timeit pd.unique(create(10**3, 0)) %timeit pd.unique(create(10**4, 0)) # quadratic running time: # for shift=32, the lower 32bits returned # by Py_Hash are 0 for 64bit builds %timeit pd.unique(create(10**3, 32)) %timeit pd.unique(create(10**4, 32)) ``` #### Problem description The times for small integers are: 222 µs vs 1.6 ms, i.e. about factor 10 The times for big integers are: 16.5 ms vs 1.68 s, i.e. about factor 100 #### Expected Output Also for big integers, the factor should be about 10 (i.e. linear) and not quadratic. #### Output of ``pd.show_versions()`` <details> INSTALLED VERSIONS ------------------ commit : 824869f5ee9f0fcc5b082d4a375395b620cb4667 python : 3.7.3.final.0 python-bits : 64 OS : Linux OS-release : 4.4.0-53-generic Version : #74-Ubuntu SMP Fri Dec 2 15:59:10 UTC 2016 machine : x86_64 processor : x86_64 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.2.0.dev0+1033.g824869f numpy : 1.19.2 pytz : 2020.1 dateutil : 2.8.1 pip : 20.2.2 setuptools : 49.6.0.post20200814 Cython : 0.29.21 pytest : 5.4.3 hypothesis : 5.36.0 sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 2.11.2 IPython : 7.18.1 pandas_datareader: None bs4 : 4.9.1 bottleneck : None fsspec : None fastparquet : None gcsfs : None matplotlib : 3.3.1 numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : None pyxlsb : None s3fs : None scipy : 1.2.1 sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None numba : 0.50.1 </details>
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