>>> list = [['foobar', 'a', 'b'], ['x', 'c'], ['y', 'd', 'e', 'foobar'], ['z', 'f']]>>> sum(x.count('foobar') for x in list)2
>>> list = [['foobar', 'a', 'b'], ['x', 'c'], ['y', 'd', 'e', 'foobar'], ['z', 'f']]>>> sum(x.count('foobar') for x in list)2名师互学网 版权所有 (c)2021-2022 ICP备案号：晋ICP备2021003244-6号
