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# Thanks baboon project for the code.
import subprocess


def cmp_to_key(mycmp):
  """ Converts a cmp= function into a key= function.
  """

  class K(object):
    def __init__(self, obj, *args):
      self.obj = obj

    def __lt__(self, other):
      return mycmp(self.obj, other.obj) < 0

    def __gt__(self, other):
      return mycmp(self.obj, other.obj) > 0

    def __eq__(self, other):
      return mycmp(self.obj, other.obj) == 0

    def __le__(self, other):
      return mycmp(self.obj, other.obj) <= 0

    def __ge__(self, other):
      return mycmp(self.obj, other.obj) >= 0

    def __ne__(self, other):
      return mycmp(self.obj, other.obj) != 0

    def __hash__(self):
      raise TypeError('hash not implemented')

  return K