python数字列表错误地转换为字符串 [英] python list of numbers converted to string incorrectly

问题描述

出于某种原因，当我编写代码时...

For some reason, when I do the code...

def encode():
    result2 = []
    print result  
    for x in result:  
        result2 += str(x)  
    print result2

我知道...

[123, 456, 789]
['1', '2', '3', '4', '5', '6', '7', '8', '9']

如何获取返回['123', '456', '789']的信息?

谢谢！

推荐答案

怎么样:

result2 = [str(x) for x in result]

获得结果的原因是+=正在执行列表串联.由于str(123)是'123'，可以看作是['1', '2', '3']，因此当您将其连接到空列表时，将得到['1', '2', '3'](其他值也是如此).

The reason you are getting what you are getting is the += is doing list concatenation. Since str(123) is '123', which can be seen as ['1', '2', '3'], when you concatenate that to the empty list you get ['1', '2', '3'] (same thing for the other values).

要使其按自己的方式工作，您需要:

For it to work doing it your way, you'd need:

result2.append(str(x)) # instead of result2 += str(x)

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