如何在python中创建列表项的可能组合的* ALL *？

Question

我需要在列表中创建ALL术语组合。我已经尝试过使用itertools的所有部分，例如排列，组合，combinations_with_replacement，但它们似乎几乎都在“计数”。例如，使用此代码：

from itertools import combinations_with_replacement
hex_chars = ["0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"]
perm = combinations_with_replacement(hex_chars, 5) 
for i in list(perm): 
    print(i)

它产生：

('0', '0', '0', '0', '0')
('0', '0', '0', '0', '1')
('0', '0', '0', '0', '2')
('0', '0', '0', '0', '3')
('0', '0', '0', '0', '4')
('0', '0', '0', '0', '5')
('0', '0', '0', '0', '6')
('0', '0', '0', '0', '7')
('0', '0', '0', '0', '8')
('0', '0', '0', '0', '9')
('0', '0', '0', '0', 'a')
('0', '0', '0', '0', 'b')
('0', '0', '0', '0', 'c')
('0', '0', '0', '0', 'd')
('0', '0', '0', '0', 'e')
('0', '0', '0', '0', 'f')
('0', '0', '0', '1', '1')

我需要它来产生几乎所有可能的组合，例如，您会注意到它不会产生“ 000010”，并且如果放置足够长的时间，它将不会产生诸如“ A000A”之类的字符串。我需要生成字符串长度为5的所有组合（包括重复项），然后将它们全部保存到外部.txt文件中。感谢您的帮助！

Answer 1

from itertools import permutations
perm = permutations(hex_chars, 5)
while a:
    try: 
        print(next(a))
    except:
        pass