字符串所有可能情况的组合 [英] Combination of all possible cases of a string

问题描述

我正在尝试创建一个程序来生成python中字符串的所有可能的大写形式.例如，给定"abcedfghij"，我想要一个程序生成: Abcdefghij ABcdef .. . . aBcdef .. . ABCDEFGHIJ

I am trying to create a program to generate all possible capitalization cases of a string in python. For example, given 'abcedfghij', I want a program to generate: Abcdefghij ABcdef.. . . aBcdef.. . ABCDEFGHIJ

以此类推.我正在尝试找到一种快速的方法，但是我不知道从哪里开始.

And so on. I am trying to find a quick way to do it, but I don't know where to start.

推荐答案

from itertools import product, izip
def Cc(s):
    s = s.lower()
    for p in product(*[(0,1)]*len(s)):
      yield ''.join( c.upper() if t else c for t,c in izip(p,s))

print list(Cc("Dan"))

打印:

['dan', 'daN', 'dAn', 'dAN', 'Dan', 'DaN', 'DAn', 'DAN']

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