pandas.Index.difference

Index.difference(other) [source]

Return a new Index with elements from the index that are not in other.

This is the set difference of two Index objects. It’s sorted if sorting is possible.

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

Examples

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

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https://pandas.pydata.org/pandas-docs/version/0.23.4/generated/pandas.Index.difference.html