Series.isin()

Series.isin(values) [source]

Return a boolean Series showing whether each element in the Series is exactly contained in the passed sequence of values.

Parameters:

Parameters:	values : set or list-like The sequence of values to test. Passing in a single string will raise a `TypeError`. Instead, turn a single string into a `list` of one element. New in version 0.18.1. Support for values as a set
Returns:	isin : Series (bool dtype)
Raises:	TypeError If `values` is a string

values : set or list-like

The sequence of values to test. Passing in a single string will raise a TypeError. Instead, turn a single string into a list of one element.

New in version 0.18.1.

Support for values as a set

Returns:

isin : Series (bool dtype)

Raises:

TypeError

>>> s = pd.Series(list('abc'))
>>> s.isin(['a', 'c', 'e'])
0     True
1    False
2     True
dtype: bool

Passing a single string as s.isin('a') will raise an error. Use a list of one element instead:

>>> s.isin(['a'])
0     True
1    False
2    False
dtype: bool

Links:

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2025-01-10 15:47:30

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