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DataFrame.combine_first(other)
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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:
1>>> a.combine_first(b)
DataFrame.combine_first()

2025-01-10 15:47:30
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