pandas.Series.isna — pandas 3.0.1 documentation (original) (raw)

Series.isna()[source]#

Detect missing values.

Return a boolean same-sized Series indicating if the values are NA. NA values, such as None or numpy.NaN, get mapped to True values. Everything else gets mapped to False values. Characters such as empty strings '' or numpy.inf are not considered NA values.

Returns:

Series

Mask of bool values for each element in Series that indicates whether an element is an NA value.

Examples

Show which entries in a Series are NA.

ser = pd.Series([5, 6, np.nan]) ser 0 5.0 1 6.0 2 NaN dtype: float64 ser.isna() 0 False 1 False 2 True dtype: bool