(self, item)
Return the rank (index) of ``item`` in this :class:`zset`.
Return the rank (index) of ``item`` in this :class:`zset`.
Return the rank ( index ) of item in this : class : zset .
def rank(self, item):
        '''Return the rank (index) of ``item`` in this :class:`zset`.'''
        score = self._dict.get(item)
        if score is not None:
            return self._sl.rank(score)
def rank ( self , item ) : score = self . _dict . get ( item ) if score is not None : return self . _sl . rank ( score )