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# pandas.DataFrame.combine_first

`DataFrame.``combine_first`(other)

  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)

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