code: def getall(self, key, failobj=None):
          
          if self.mmkeys is None: self._mmInit()
          k = self.mmkeys.get(key)
          if not k: return failobj
          return list(map(self.data.get, k))
docs: Returns a list of all the matching values for key,
          containing a single entry for unambiguous matches and
          multiple entries for ambiguous matches.