Series.isna() [source]
Return a boolean same-sized object indicating if the values are NA.
See also
Series.notna
Series.isnull
isna
© 2008–2012, AQR Capital Management, LLC, Lambda Foundry, Inc. and PyData Development Team
Licensed under the 3-clause BSD License.
http://pandas.pydata.org/pandas-docs/version/0.22.0/generated/pandas.Series.isna.html