如何使用python将[1,2,3,4]更改为"1234" [英] how to change [1,2,3,4] to '1234' using python

问题描述

如何将int的列表转换为单个字符串，例如:

How do I convert a list of ints to a single string, such that:

[1, 2, 3, 4]变为'1234'
[10, 11, 12, 13]变为'10111213'

[1, 2, 3, 4] becomes '1234'
[10, 11, 12, 13] becomes '10111213'

...等等...

推荐答案

''.join(map(str, [1,2,3,4] ))

• map(str, array) 等同于[str(x) for x in array]，因此map(str, [1,2,3,4])返回['1', '2', '3', '4'].

• s.join(a) 连接序列中的所有项目a，例如字符串s

  • map(str, array) is equivalent to [str(x) for x in array], so map(str, [1,2,3,4]) returns ['1', '2', '3', '4'].

  • s.join(a) concatenates all items in the sequence a by the string s, for example,

    >>> ','.join(['foo', 'bar', '', 'baz'])
    'foo,bar,,baz'
    

    请注意，.join只能连接字符串序列.它不会自动调用str.

    Note that .join can only join string sequences. It won't call str automatically.

    >>> ''.join([1,2,3,4])
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    TypeError: sequence item 0: expected string, int found
    

    因此，我们需要先map将所有项目首先放入字符串中.

    Therefore we need to first map all items into strings first.

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