2017-12-19python全栈9期第四天第二节之列表的增删查改之公共方法len和count和index时间:2023-03-09 20:46:18 #!/user/bin/python# -*- coding:utf-8 -*-li = ['zs','ls','ww','zl','xx']l = len(li) #总数print(l)num = li.count('ww') #计数几个print(num)print(li.index('zl')) #索引位置#li =