import random

# 私钥
key = "abcdefgh使用python实现简单的位移替换加密，制作密码机关真是太好玩了哈哈哈！"
# 要加密语句
message = "诺依，周末一起去看动漫展吧！"
# 最终加密后的语句
key_message = ""
# 干扰字符
noise = "port:@#$%^&"
for i in message:
    str1 = i
    str2 = random.choice(key)
    str3 = random.choice(key)
    text = str1+str2+str3
    key_message = key_message + text

list_message = list(key_message)

index = random.randint(0, len(key_message))
list_message.insert(index, noise)

result_message = "".join(list_message)
print(result_message)


#解密
list_message = list(result_message)
for i in range(len(noise)):
    list_message.pop(index)
key_message = "".join(list_message)
print(key_message)

res = key_message[0]
i = 0
# for i in range(len(key_message)):
while i < len(key_message):
    i+=3
    if i <len(key_message):
        res+=key_message[i]

print(res)