DEPR: GroupBy.fillna positional arguments #48395
Labels
API - Consistency
Internal Consistency of API/Behavior
Deprecate
Functionality to remove in pandas
Groupby
All positional arguments to Series.fillna are deprecated except for value and must be keyword only in the future. The corresponding change should be made to SeriesGroupBy and DataFrameGroupBy implementations of fillna (and perhaps on other objects as well).
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