转自：http://www.runoob.com/python/python-func-enumerate.html
enumerate(sequence, [start=0])
>>>seasons = [‘Spring‘, ‘Summer‘, ‘Fall‘, ‘Winter‘] >>> list(enumerate(seasons)) [(0, ‘Spring‘), (1, ‘Summer‘), (2, ‘Fall‘), (3, ‘Winter‘)] >>> list(enumerate(seasons, start=1)) # 下标从 1 开始 [(1, ‘Spring‘), (2, ‘Summer‘), (3, ‘Fall‘), (4, ‘Winter‘)]
for循环使用enumerate:
>>>seq = [‘one‘, ‘two‘, ‘three‘] >>> for i, element in enumerate(seq): ... print i, element ... 0 one 1 two 2 three
//在for循环中会返回下标和对应的元素。
原文：https://www.cnblogs.com/BlueBlueSea/p/10613474.html