code: def pop(self, *args):
          
          if len(args) < 3:
              return self._store.pop(*args)
          else:
              raise TypeError("pop expected at most 2 arguments, got {}".format(len(args)))
docs: D.pop(k[,d]) -> v, remove specified key and return the corresponding value.
              If key is not found, d is returned if given, otherwise KeyError is raised.