Question

我想找到一个长度在1-4个字符之间的字母字符串。

我从迭代52个字母的列表开始：

letters = string.ascii_letters

然后，我需要遍历相同的列表，查看字符串的后3个字符，直到找到我要查找的字符串。

如果每个_代表52个字母的列表，我需要基本上这样做，同时在每次迭代时检查匹配：

_
_ _
_ _ _
_ _ _ _

我如何才能最好地构建一系列循环来实现这一目标？

如果问题的前提似乎令人困惑，那就是针对暴力破解的问题。我简单地提取了我正在努力解决的部分问题。

编辑：这是我到目前为止所处的地方。

#we know the salt is the 2-digit '50'
#we know the key is limited to 4 alphabetical letters
#cycle through all possibilities of the key till we match the hash

letters = string.ascii_letters
lcounter = 0
i = 0
j = 0
k = 0
l = 0
tryhash = "a"
word = [letters[i]]

while(tryhash != hash):
    for c in letters:
        word = [letters[i]]  #this does not work as the additional letters need to be appended to word after the first lcounter loop
        tryword = ''.join(word)
        tryhash = crypt.crypt(tryword, "50")

        if (tryhash == hash):
            print(word)
            break

        i += 1

        if (lcounter > 0) and (i == 52):
            i = 0
            if (lcounter == 1) and (j == 0):
                word.insert(lcounter, letters[j])
            j += 1

            if (lcounter > 1) and (k == 52):
                j = 0
                if (lcounter == 2) and (k == 0):
                    word.insert(lcounter, letters[k])
                k += 1

                if (lcounter > 2) and (k == 52):
                    k = 0
                    if (lcounter == 3) and (l == 0):
                        word.insert(lcounter, letters[l])
                    l += 1

    lcounter += 1

Answer 1

您可以这样做：


    import string
    import itertools

    data = string.ascii_lowecase

    for i in itertools.permutations(data, 4):

        if i == 'your_string':
            #do something
        else:
            pass

Answer 2

或许这样的事情：

my_string = "some"
for letter1 in string.ascii_letters:
    if letter1 == my_string:
        print("success")
    for letter2 in string.ascii_letters:
        if letter1 + letter2 == my_string:
            print("success")
        for letter3 in string.ascii_letters:
            if letter1 + letter2 + letter3 == my_string:
                print("success")
            for letter4 in string.ascii_letters:
                if letter1 + letter2 + letter3 + letter4 == my_string
                    print("success")

按顺序迭代多个字符列表

2 个答案: