pandas.Index.isna
Index.isna()[source]-
Detect missing values
New in version 0.20.0.
Returns: a boolean array of whether my values are NA See also
isnull- alias of isna
pandas.isna- top-level isna
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Licensed under the 3-clause BSD License.
https://pandas.pydata.org/pandas-docs/version/0.21.1/generated/pandas.Index.isna.html