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added validation for series datatypes #56659

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added validation for series datatypes #56659

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5 changes: 5 additions & 0 deletions pandas/core/series.py
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Original file line number Diff line number Diff line change
Expand Up @@ -73,6 +73,7 @@
from pandas.core.dtypes.common import (
is_dict_like,
is_integer,
is_float,
is_iterator,
is_list_like,
is_object_dtype,
Expand Down Expand Up @@ -3102,6 +3103,10 @@ def diff(self, periods: int = 1) -> Series:
--------
{examples}
"""
if not lib.is_integer(periods):
if not (is_float(periods) and periods.is_integer()):
raise ValueError("periods must be an integer")
periods = int(periods)
result = algorithms.diff(self._values, periods)
return self._constructor(result, index=self.index, copy=False).__finalize__(
self, method="diff"
Expand Down