Index.difference(self, other, sort=None)[source]

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

This is the set difference of two Index objects.

other : Index or array-like
sort : False or None, default None

Whether to sort the resulting index. By default, the values are attempted to be sorted, but any TypeError from incomparable elements is caught by pandas.

  • None : Attempt to sort the result, but catch any TypeErrors from comparing incomparable elements.
  • False : Do not sort the result.

New in version 0.24.0.

Changed in version 0.24.1: Changed the default value from True to None (without change in behaviour).

difference : Index


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