将列表的字符串转换为列表中的整数列表 [英] Convert strings of list to list of integers inside a list

问题描述

我有一个字符串列表，这些字符串是列表。像这样： ['[1,2,3]'，'[10,12,5]'] ，例如。我想得到一份清单，甚至是每个清单：

I have a list of strings and those strings are lists. Like this: ['[1,2,3]','[10,12,5]'], for example. I want to get a list of lists or even every list there:

[[1,2,3],[10,12,5]]

推荐答案

你应该使用 literal_eval 获取实际列表来自字符串的对象。

You should use literal_eval to get actual list object from string.

>>> from ast import literal_eval
>>> data =  ['[1,2,3]','[10,12,5]']
>>> data = [literal_eval(each) for each in data]
>>> data
[[1, 2, 3], [10, 12, 5]]

literal_eval 安全地评估每个对象。

literal_eval safely evaluates each object.

>>> help(literal_eval)
Help on function literal_eval in module ast:

literal_eval(node_or_string)
    Safely evaluate an expression node or a string containing a Python
    expression.  The string or node provided may only consist of the following
    Python literal structures: strings, numbers, tuples, lists, dicts, booleans,
    and None.

你应该总是尽量避免使用 eval 功能。阅读更多此处。

You should always try to avoid using eval function. Read more here.

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