code: def _gen_memd_wrappers(cls, factory):
          
          d = {}
          for n in cls._MEMCACHED_OPERATIONS:
              for variant in (n, n + "_multi"):
                  try:
                      d[variant] = factory(getattr(cls, variant), variant)
                  except AttributeError:
                      if n in cls._MEMCACHED_NOMULTI:
                          continue
                      raise
          return d
docs: Generates wrappers for all the memcached operations.
          :param factory: A function to be called to return the wrapped
              method. It will be called with two arguments; the first is
              the unbound method being wrapped, and the second is the name
              of such a method.
  
            The factory shall return a new unbound method
  
          :return: A dictionary of names mapping the API calls to the
              wrapped functions