Form the intersection of two Index objects.
This returns a new Index with elements common to the index and other.
Whether to sort the resulting index.
None : sort the result, except when self and other are equal or when the values cannot be compared.
False : do not sort the result.
True : Sort the result (which may raise TypeError).
Examples
>>> idx1 = pd.Index([1, 2, 3, 4])
>>> idx2 = pd.Index([3, 4, 5, 6])
>>> idx1.intersection(idx2)
Index([3, 4], dtype='int64')
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https://pandas.pydata.org/pandas-docs/version/2.3.0/reference/api/pandas.Index.intersection.html