题解 | #字符串加密#

思路：创建一个字典，将标准字母表映射到加密字母表

写法1

def encrypt(key, s):
    alphas = ''.join([chr(ord('a')+i) for i in range(26)])
    new_alphas = ""
    for c in key:
        if c not in new_alphas:
            new_alphas += c

    for c in alphas:
        if c not in new_alphas:
            new_alphas += c

    dic = dict(zip(alphas, new_alphas))
    result = "".join([dic.get(c, c) if c.islower() else dic.get(c.lower(), c).upper() for c in s])
    return result


key = input().lower()
s = input()
print(encrypt(key, s))

写法2

letter_list = [chr(ord('a') + i) for i in range(26)]
new_list = []

while True:
    try:
        key = input().lower()
        s = input()

        for i in key:
            if i not in new_list:
                new_list.append(i)

        for j in letter_list:
            if j not in new_list:
                new_list.append(j)

        m = dict(zip(letter_list, new_list))

        res = []
        for c in s:
            if not c.isalpha():
                res.append(c)
            elif c.lower():
                res.append(m[c])
            else:
                res.append(m[c.lower()].upper())
        print(''.join(res))
    except:
        break