Series.map()
pandas.Series.map
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Series.map(arg, na_action=None)
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Map values of Series using input correspondence (which can be a dict, Series, or function)
Parameters: arg : function, dict, or Series
na_action : {None, ‘ignore’}
If ‘ignore’, propagate NA values
Returns: y : Series
same index as caller
Examples
>>> x one 1 two 2 three 3
>>> y 1 foo 2 bar 3 baz
>>> x.map(y) one foo two bar three baz
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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.map.html