How to return index of lists in Python

2018-06-07 21:22:12

This question already has an answer here:

Accessing the index in 'for' loops? 17 answers

使用enumerate ：

>>> a = [[0,1,2],[0,0,0],[1,1,1]]
>>> [i for i, x in enumerate(a, 1) if 2 not in x]
[2, 3]

Use enumerate :

[i for i, j in enumerate(a) if 2 not in j]

note that list indices in Python start from 0 , not from 1

你可以使用index [U.index(l) for l in U if not 2 in l]

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