old_contents: from _pymue import peng, Team, DistanceMatrix, SeenTable, GuestTupleGenerator
  
new_contents: from _pymue import peng, Team, DistanceMatrix, SeenTable, GuestTupleGenerator, GuestPair
  
  def pair_pprint(pair):
      return "(%s, %s)" % (pair.first, pair.second)
  
  GuestPair.__repr__ = pair_pprint
  
subject: Add string representation to GuestPair