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From str to float in Python

I really want to know how to change a nested str list such as [["2.1", "3.4"], ["1.1", "5.6"]] to a nested float list like [[2.1, 3.4], [1.1, 5.6]]. If it's not nested, I think it's realized by using map(float, "str_list"), but if I want to do that to a nested list, I haven't got any nice solution. Is there anybody who has some idea? I really appreciate your comment. Thank you in advance!!

25th Apr 2018, 10:56 PM
Yuma
2 Respostas
0
Thank you for your suggestion, but if the str_list is nested like [["2.1", "3.4"], ["1.1", "5.6"]], Python returns TypeError which says argument must be a sting or a number, not 'list'. Is there any solution for that?
26th Apr 2018, 1:22 PM
Yuma