如何将intable字符串列表转换为int [英] How to convert list of intable strings to int

问题描述

在Python中，我想转换一个字符串列表：

In Python, I want to convert a list of strings:

l = ['sam','1','dad','21']

并将整数转换为整数类型，如下所示：

and convert the integers to integer types like this:

t = ['sam',1,'dad',21]

我试过：

t = [map(int, x) for x in l]

但显示错误。

如何将列表中的所有 intable 字符串转换为int，将其他元素保留为字符串？

How could I convert all intable strings in a list to int, leaving other elements as strings?

我的列表可能是多维的。适用于通用列表的方法更可取：

My list might be multi-dimensional. A method which works for a generic list would be preferable:

l = [['aa'，'2']，['bb' ，'3']]

推荐答案

我使用自定义函数：

def try_int(x):
    try:
        return int(x)
    except ValueError:
        return x

示例：

>>> [try_int(x) for x in  ['sam', '1', 'dad', '21']]
['sam', 1, 'dad', 21]

---

编辑如果您需要将以上内容应用于列表列表，为什么在构建嵌套列表时没有将这些字符串转换为int？

---

If you need to apply the above to a list of lists, why didn't you converted those strings to int while building the nested list?

无论如何，如果需要，如何迭代这样的嵌套列表并应用上述方法只是一个选择问题。

Anyway, if you need to, it's just a matter of choice on how to iterate over such nested list and apply the method above.

这样做的一种方法可能是：

One way for doing that, might be:

>>> list_of_lists = [['aa', '2'], ['bb', '3']]
>>> [[try_int(x) for x in lst] for lst in list_of_lists]
[['aa', 2], ['bb', 3]]

您可以明确地将其重新分配给 list_of_lists ：

You can obviusly reassign that to list_of_lists:

>>> list_of_lists = [[try_int(x) for x in lst] for lst in list_of_lists]

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