code: def unordered_pair_eq(pair1, pair2):
      '''Performs pairwise unordered equality.
  
      ``pair1`` == ``pair2`` if and only if
      ``frozenset(pair1)`` == ``frozenset(pair2)``.
      '''
      (x1, y1), (x2, y2) = pair1, pair2
      return (x1 == x2 and y1 == y2) or (x1 == y2 and y1 == x2f unordered_pair_eq(pair1, pair2):
      '''Performs pairwise unordered equality.
  
      ``pair1`` == ``pair2`` if and only if
      ``frozenset(pair1)`` == ``frozenset(pair2)``.
      '''
      (x1, y1), (x2, y2) = pair1, pair2
      return (x1 == x2 and y1 == y2) or (x1 == y2 and y1 == x2)
docs: Performs pairwise unordered equality.
  
      ``pair1`` == ``pair2`` if and only if
      ``frozenset(pair1)`` == ``frozenset(pair2)``.