python enumerate用法

在同时需要用到index和value值的时候可以用到enumerate，参数为可遍历的变量，如字符串，列表等，返回enumerate类。

例：

import string

s = string.ascii_lowercase

e = enumerate(s)

print s

print list(e)

输出结果为：

[(0, ‘a‘), (1, ‘b‘), (2, ‘c‘), (3, ‘d‘), (4, ‘e‘), (5, ‘f‘), (6, ‘g‘), (7, ‘h‘),

(8, ‘i‘), (9, ‘j‘), (10, ‘k‘), (11, ‘l‘), (12, ‘m‘), (13, ‘n‘), (14, ‘o‘), (15,

‘p‘), (16, ‘q‘), (17, ‘r‘), (18, ‘s‘), (19, ‘t‘), (20, ‘u‘), (21, ‘v‘), (22, ‘w

‘), (23, ‘x‘), (24, ‘y‘), (25, ‘z‘)]

用enumerate将string中的1都找出来，用enumerate实现：

def fun(line):

return  ((ids,int(val)) for ids,val in enumerate(line) if val != ‘0‘)

print list(fun("000111000111"))

输出结果为：

[(3, 1), (4, 1), (5, 1), (9, 1), (10, 1), (11, 1)]

原文地址：https://www.cnblogs.com/jinan1/p/10751520.html