您将如何从字符串列表中创建一个逗号分隔的字符串? [英] How would you make a comma-separated string from a list of strings?

问题描述

从序列连接字符串的首选方式是什么，以便在每两对连续的对之间添加一个逗号.也就是说，如何将例如['a', 'b', 'c']映射到'a,b,c'? (案例['s']和[]应该分别映射到's'和''.)

What would be your preferred way to concatenate strings from a sequence such that between every two consecutive pairs a comma is added. That is, how do you map, for instance, ['a', 'b', 'c'] to 'a,b,c'? (The cases ['s'] and [] should be mapped to 's' and '', respectively.)

我通常最终会使用''.join(map(lambda x: x+',',l))[:-1]之类的东西，但也会感到有些不满意.

I usually end up using something like ''.join(map(lambda x: x+',',l))[:-1], but also feeling somewhat unsatisfied.

推荐答案

my_list = ['a', 'b', 'c', 'd']
my_string = ','.join(my_list)

如果列表中包含数字，则此方法将无效.

This won't work if the list contains numbers.

如果列表包含非字符串类型(例如整数，浮点数，布尔值，无)，则请执行以下操作:

And if the list contains non-string types (such as integers, floats, bools, None) then do:

my_string = ','.join(map(str, my_list)) 

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