Python enumerate函数

功能:

enumerate()是python的内置函数,用于将一个可遍历的数据对象(如列表、元组或字符串等)组合为一个索引序列,同时列出数据和数据下标,多用于for循环

语法:

enumerate(a,start)

a是可迭代对象,start是计数起始数字

示例一:

1 li = ["a","b","c","d","e","f"]
2 
3 for i in enumerate(li):
4     print(i)

结果:

(0, 'a')
(1, 'b')
(2, 'c')
(3, 'd')
(4, 'e')
(5, 'f')

示例二:

li = ["a","b","c","d","e","f"]

for i in enumerate(li,1):
    print(i)

结果:

1 (1, 'a')
2 (2, 'b')
3 (3, 'c')
4 (4, 'd')
5 (5, 'e')
6 (6, 'f')

 

 

 

 

posted @ 2018-10-22 16:26  骑白马的猴子  阅读(6289)  评论(0编辑  收藏  举报