docs: def arg_comparitor(name):
      """
      :param arg name
      :return: pair containing  name, comparitor
  
      given an argument name, munge it and return a proper comparitor
  
      >>> arg_comparitor("a")
      a, operator.eq
  
      >>> arg_comparitor("a__in")
      a, operator.contains
      """
      if name.endswith("__in"):
          return name[:-4], contains
      elif name.endswith("__ge"):
          return name[:-4], ge
      elif name.endswith("__gt"):
          return name[:-4], gt
      elif name.endswith("__le"):
          return name[:-4], le
      elif name.endswith("__lt"):
          return name[:-4], lt
      if name.endswith("__eq"):
          return name[:-4], eq
      if name.endswith("__ne"):
          return name[:-4], ne
      else:
          return name, eq