code: def getallkeys(self, key, failobj=None):
          
          if self.mmkeys is None: self._mmInit()
          return self.mmkeys.get(key, failobj)
docs: Returns a list of the full key names (not the items)
          for all the matching values for key.  The list will
          contain a single entry for unambiguous matches and
          multiple entries for ambiguous matches.