功能和方法以及str或return问题

时间:2016-07-14 19:55:30

标签: python python-2.7 python-3.x encryption

所以我有一个程序,它带有描述,密码和密钥。但是当我把密码和密钥放入加密方法时,由于它是一个函数,当我试图获得返回时会出现错误,所以我该如何解决这个问题?

def encrypt(plaintext, key):
alphabet = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()_-"
cipher = " "
for c in plaintext:
    if c in alphabet:
        cipher += alphabet[(alphabet.index(c) + key) % (len(alphabet))]
print("Your encrypeted msg is: ", cipher)
return cipher


def decrypt(cryptedtext, key):
alphabet = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()_-"
cipher = " "

for c in cryptedtext:
    if c in alphabet:
        cipher += alphabet[(alphabet.index(c) - key) % len(alphabet)]
print("decrypt: ", cipher)


def EnterInfo():
entry = input(" please enter in des to be stored")
entry2 = input(" please enter in pass to be stored")
entry3 = int(input(" please enter in key to be stored"))
encrypt(entry2, entry3)
entry2 = encrypt
with open("test.txt", 'a') as myfile:
    myfile.write(entry + ":" + entry2 + ":\n")

EnterInfo()

错误:

File "C:/Users/yoyo/PycharmProjects/crypt/CombineCryptAndTxtPyFile.py", line 29, in EnterInfo
myfile.write(entry + ":" + entry2 + ":\n")
TypeError: Can't convert 'function' object to str implicitly

1 个答案:

答案 0 :(得分:1)

您错误处理了功能使用情况:

encrypt(entry2, entry3)
entry2 = encrypt

在第一行,您调用encryptentry2上的entry3函数,然后返回结果,然后立即丢弃,因为您还没有分配它任何事情。

然后在第二行中,将entry2设置为等于函数 encrypt,而不是之前函数调用的结果。所以你试图连接一个字符串和一个没有字符串等效的函数。

相反,请将encrypt调用的结果分配给变量,并在write调用中使用该结果。

示例:

result = encrypt(entry1, entry2)