蟒蛇:将字符串的二维列表转换为浮点数 [英] python: convert 2 dimension list of string to float

问题描述

我有一个二维类型的字符串类型列表，我试图将其转换为int类型.到目前为止我尝试过的事情:

I have a 2 dimension list of type string I'm trying to convert it to int. Things I've tried so far:

[[float(i) for i in lst[j] for j in lst]

带有for循环:

for i in range(len(lst)):
    for j in range(len(lst[i])):
         lst[i][j]=float(lst[i][j])

推荐答案

>>> nums = [['4.58416458379', '3.40522046551', '1.68991195077'], ['3.61503670628', '5.64553650642', '1.39648965337'], ['8.02595866276', '8.42455003038', '7.93340754534']]
>>> [[float(y) for y in x] for x in nums]
[[4.58416458379, 3.40522046551, 1.68991195077], [3.61503670628, 5.64553650642, 1.39648965337], [8.02595866276, 8.42455003038, 7.93340754534]]

我不确定您的意图是什么，但是由于您声称for循环版本不起作用，因此在这种情况下，可能需要一维结果:

I'm not sure what your intention is but since you claim the for loop version didn't work, maybe you want a one dimensional result, in that case:

>>> [float(y) for x in nums for y in x]
[4.58416458379, 3.40522046551, 1.68991195077, 3.61503670628, 5.64553650642, 1.39648965337, 8.02595866276, 8.42455003038, 7.93340754534]

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