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DEPR: positional arguments in favor of keyword arguments #48735

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DEPR: positional arguments in favor of keyword arguments #48735

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948eca4
Deprecate positional arguments in favor of keyword arguments
Sep 23, 2022
ca1d1d0
add entry to whatsnew
Sep 23, 2022
a4b0256
Fix: Review comments for deprecation PR
Sep 30, 2022
2acb431
Merge branch 'main' into deprecate_positional_arguments_groupby
ambujpawar Sep 30, 2022
e2602e0
Change whatsnew
Oct 8, 2022
469a9bc
Merge branch 'main' into deprecate_positional_arguments_groupby
Oct 8, 2022
ccfb976
Merge branch 'main' into deprecate_positional_arguments_groupby
ambujpawar Oct 11, 2022
4562ba6
Change value to ``value``
ambujpawar Oct 12, 2022
ac961d0
Move change from indexing to deprecations
Oct 16, 2022
33b9f15
Merge branch 'main' into deprecate_positional_arguments_groupby
Oct 16, 2022
87c525b
ADD: Deprecation warning
Oct 16, 2022
844e9cd
Merge branch 'main' into deprecate_positional_arguments_groupby
ambujpawar Oct 18, 2022
c39993c
use deprecation decorators instead of warning
Oct 26, 2022
8079969
Merge branch 'main' into deprecate_positional_arguments_groupby
Oct 26, 2022
ec1b703
fix: typo in import
Oct 26, 2022
c72091f
Merge branch 'main' into deprecate_positional_arguments_groupby
ambujpawar Oct 27, 2022
48d47f7
Merge branch 'main' into deprecate_positional_arguments_groupby
ambujpawar Jan 13, 2023
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5 changes: 2 additions & 3 deletions doc/source/whatsnew/v2.0.0.rst
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Expand Up @@ -133,8 +133,7 @@ Other API changes

Deprecations
~~~~~~~~~~~~
-
-


.. ---------------------------------------------------------------------------
.. _whatsnew_200.performance:
Expand Down Expand Up @@ -226,7 +225,6 @@ Indexing
- Bug in :meth:`DataFrame.reindex` casting dtype to ``object`` when :class:`DataFrame` has single extension array column when re-indexing ``columns`` and ``index`` (:issue:`48190`)
- Bug in :func:`~DataFrame.describe` when formatting percentiles in the resulting index showed more decimals than needed (:issue:`46362`)
- Bug in :meth:`DataFrame.compare` does not recognize differences when comparing ``NA`` with value in nullable dtypes (:issue:`48939`)
-

Missing
^^^^^^^
Expand Down Expand Up @@ -301,6 +299,7 @@ Metadata

Other
^^^^^
- Add future warnings in :meth:`DataFrameGroupBy.fillna` and :meth:`SeriesGroupBy.fillna` allowing only keyword arguments to be passed except ``value`` (:issue:`48395`)
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move to section starting on L564 and reword like the others, so maybe "Deprecated...." instead of mentioning FutureWarning.


.. ***DO NOT USE THIS SECTION***

Expand Down
12 changes: 12 additions & 0 deletions pandas/core/groupby/generic.py
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Expand Up @@ -840,6 +840,12 @@ def fillna(
5 NaN
dtype: float64
"""
warnings.warn(
'In a future version of pandas, all the parameters except "value" '
"of SeriesGroupBy.fillna have to be keyword-only.",
FutureWarning,
stacklevel=find_stack_level(),
)
result = self._op_via_apply(
"fillna",
value=value,
Expand Down Expand Up @@ -2267,6 +2273,12 @@ def fillna(
3 3.0 NaN 2.0
4 3.0 NaN NaN
"""
warnings.warn(
'In a future version of pandas, all the parameters except "value" '
"of DataFrameGroupBy.fillna have to be keyword-only.",
FutureWarning,
stacklevel=find_stack_level(),
)
result = self._op_via_apply(
"fillna",
value=value,
Expand Down