pandas.Series.keys

Series.keys()[source]

Return alias for index.

Returns:
Index

Index of the Series.

Examples

>>> s = pd.Series([1, 2, 3], index=[0, 1, 2])
>>> s.keys()
Index([0, 1, 2], dtype='int64')

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https://pandas.pydata.org/pandas-docs/version/2.3.0/reference/api/pandas.Series.keys.html