pandas.Index.union

Index.union(other)[source]

Form the union of two Index objects and sorts if possible.

Parameters:	other : Index or array-like
Returns:	union : Index

Examples

>>> idx1 = pd.Index([1, 2, 3, 4])
>>> idx2 = pd.Index([3, 4, 5, 6])
>>> idx1.union(idx2)
Int64Index([1, 2, 3, 4, 5, 6], dtype='int64')