MultiIndex.
to_flat_index
Convert a MultiIndex to an Index of Tuples containing the level values.
New in version 0.24.0.
Index with the MultiIndex data represented in Tuples.
Notes
This method will simply return the caller if called by anything other than a MultiIndex.
Examples
>>> index = pd.MultiIndex.from_product( ... [['foo', 'bar'], ['baz', 'qux']], ... names=['a', 'b']) >>> index.to_flat_index() Index([('foo', 'baz'), ('foo', 'qux'), ('bar', 'baz'), ('bar', 'qux')], dtype='object')