Series.update()

pandas.Series.update

Series.update(other)

Modify Series in place using non-NA values from passed Series. Aligns on index

Parameters:	other : Series

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© 2008–2014 the pandas development team
Licensed under the 3-clause BSD License.
http://pandas.pydata.org/pandas-docs/version/0.18.1/generated/pandas.Series.update.html