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Add type to arg of series/drop-duplicates #40910

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Add type to arg of series/drop-duplicates #40910

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14 changes: 10 additions & 4 deletions pandas/core/series.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2004,22 +2004,28 @@ def unique(self) -> ArrayLike:
return super().unique()

@overload
def drop_duplicates(self, keep=..., inplace: Literal[False] = ...) -> Series:
def drop_duplicates(
self, keep: str | bool = ..., inplace: Literal[False] = ...
) -> Series:
...

@overload
def drop_duplicates(self, keep, inplace: Literal[True]) -> None:
def drop_duplicates(self, keep: str | bool, inplace: Literal[True]) -> None:
...

@overload
def drop_duplicates(self, *, inplace: Literal[True]) -> None:
...

@overload
def drop_duplicates(self, keep=..., inplace: bool = ...) -> Series | None:
def drop_duplicates(
self, keep: str | bool = ..., inplace: bool = ...
) -> Series | None:
...

def drop_duplicates(self, keep="first", inplace=False) -> Series | None:
def drop_duplicates(
self, keep: str | bool = "first", inplace=False
) -> Series | None:
"""
Return Series with duplicate values removed.

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