我无法将我的类变量转移到另一个类

Question

真的不顾一切地问这个。我需要将我的CipherText转移到另一个类中，它不起作用。我错过了什么？对不起，很长的帖子。 （我已经删除了那两个类中的一些GUI（tkinter）代码。）我似乎无法在这里找到解决方案。很高兴能得到一些帮助。感谢!!!

class Decmesbuttons():


   def decmescommand(self):
       datenow = str(datetime.datetime.now().date())
       timenow = str(datetime.datetime.now().time())


       privk = privkeyvarS.get()

       #No key found error
       try:
           pathpriv = r'/home/gene/Desktop/ppl/keys/' + privk
           loadprivkey = M2Crypto.RSA.load_key (pathpriv + '/' + privk + '-private.key')

       except IOError: 
           tkMessageBox.showwarning("Warning!", "No "+ privk + " key found.")


       #Wrong key error & printing of the decrypted message
       try:
           PlainText = loadprivkey.private_decrypt (Ciphertext, M2Crypto.RSA.pkcs1_oaep_padding)

           if PlainText != "":
               tkMessageBox.showinfo("DECRYPTED!","Message decrypted by " + privk + " :" + Plaintext)

       except:
           tkMessageBox.showwarning("Warning!", "Wrong key!")

class Encmesbuttons():


    def encmescommand(self):
        datenow = str(datetime.datetime.now().date())
        timenow = str(datetime.datetime.now().time())

        m = messagevarS.get()
        pk = pubkeyvarS.get()

        #Input of selected message to encrypt

        em = m + '\n' + '-'
        if not m:
            tkMessageBox.showwarning("Warning!", "No message to encrypt")

        else:
            #add to log
            logkey = open ('log'+datenow+'.txt', 'a')
            logkey.write(timenow +'-'  + ' Some user inputted a message.' + "\n") 
            logkey.close()

            f = open ('message.txt', 'w')
            f.write(str(m)) 
            f.close()

        try:
            #select the public key owner to send your encrypted message 

            pathpub = r'/home/gene/Desktop/ppl/keys/' + pk
            loadpub = M2Crypto.RSA.load_pub_key (pathpub+ '/' + pk + '-public.key')

            global CT
            CipherText = loadpub.public_encrypt (m, M2Crypto.RSA.pkcs1_oaep_padding)
            CT = CipherText

            #Print the ciphered message

            tkMessageBox.showinfo("The encrypted message",str(CipherText.encode('base64')))

            #write ciphered text to file
            f = open ('encryption.txt', 'w')
            f.write(str(CipherText.encode ('base64')))
            f.close()

            #add to log
            logkey = open ('log'+datenow+'.txt', 'a')
            logkey.write(timenow +'-' + 'Some user has encrypted the message and selected ' + pk + ' as the receiver' +  "\n") 
            logkey.close()


        except IOError: 
            tkMessageBox.showwarning("Warning!", "No public key inputted")

我需要这个变量：

CipherText = loadpub.public_encrypt (m, M2Crypto.RSA.pkcs1_oaep_padding)

在这一行（带有Here符号的那一行）：

 PlainText = loadprivkey.private_decrypt (**HERE**, M2Crypto.RSA.pkcs1_oaep_padding)

Answer 1

问题在于你的范围。您在方法中定义了CipherText。尝试取出CipherText并将其作为班级中的全局变量。然后，您可以通过拨打Encmesbuttons.CipherText来访问它。

Answer 2

这不是首选方法，但您可以在global CipherText中使用global CT代替decmescommand()，并且您的变量可以在所有地方使用。目前变量CT包含您的CipherText，并且可以在所有地方访问 - 因此您可以在CT内使用CipherText代替encmescommand()。

有一点是：方法encmescommand()必须在decmescommand()之前执行，才能将值分配给CipherText / CT

修改

参见示例

class Decmesbuttons():

    def decmescommand(self):
        print('execute decmescommand()')

        print('CipherText:', CipherText)

class Encmesbuttons():


    def encmescommand(self):
         print('execute encmescommand()')

         global CipherText

         CipherText = "hello world"

d = Decmesbuttons()
e = Encmesbuttons()

e.encmescommand() # <- you have to run it before decmescommand()
d.decmescommand()

结果：

execute encmescommand()
execute decmescommand()
CipherText: hello world

编辑：更多首选方法

class Decmesbuttons():

    def decmescommand(self, text):
        print('execute decmescommand()')

        print('CipherText:', text)

class Encmesbuttons():


    def encmescommand(self):
        print('execute encmescommand()')

        CipherText = "hello world"

        return CipherText

d = Decmesbuttons()
e = Encmesbuttons()

result = e.encmescommand() # <- you have to run it before decmescommand()
d.decmescommand(result)