code: def multiget_count(self, keys, column_parent, predicate, consistency_level):
      
      self._seqid += 1
      d = self._reqs[self._seqid] = defer.Deferred()
      self.send_multiget_count(keys, column_parent, predicate, consistency_level)
      return d
docs: Perform a get_count in parallel on the given list<binary> keys. The return value maps keys to the count found.
  
      Parameters:
       - keys
       - column_parent
       - predicate
       - consistency_level