pandas.DataFrame.combine_first

DataFrame.combine_first(other) [source]

Combine two DataFrame objects and default to non-null values in frame calling the method. Result index columns will be the union of the respective indexes and columns

Parameters: other : DataFrame
Returns: combined : DataFrame

Examples

a’s values prioritized, use values from b to fill holes:

>>> a.combine_first(b)

© 2008–2012, AQR Capital Management, LLC, Lambda Foundry, Inc. and PyData Development Team
Licensed under the 3-clause BSD License.
https://pandas.pydata.org/pandas-docs/version/0.19.2/generated/pandas.DataFrame.combine_first.html