如何使列表的每个字符列表?这样的:
li = ['A','B','C']
为:
li = [['A'],['B'],['C']]
参见"列表理解"。
很简单，
[[i] for i in ['A', 'B', 'C']]
或更一般的
[f(x) for x in list_name]
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