在Python中调用内部函数的变量

Question

I know I have already asked a question like this before but I have made my code much cleaner and I am still coming up with a problem.

My code goes like this:

    class Email_Stuff:
        def Get_From_Email():
            #code to open up window and get email address
            emailaddr = #the input
            return emailaddr
        def Get_To_Email():
            #code to open up window and get to email address
            recipaddr = #the input
            return recipaddr
        def Get_Email_Address():
            #code to open up window and get email username
            EmailUser = #the input
            return EmailUser
        def Get_Email_Password():
            #code to open up window and get email password
            EmailPass = #the input
            return EmailPass
        def Send_Email():
            import smtplib
            server = smtplib.SMTP('smtp.gmail.com', 587)
            server.login((EmailUser),(EmailPass))
            message = "Python Test Email"
            server.sendmail(emailaddr,recipaddr,message)

I need to get the variables: emailaddr , recipaddr , EmailUser , and EmailPass into the function Send_Email . I'm not sure how I could do that though because when I run this code, it tells me that "the global name isn't defined".

Any ideas?

Answer 1

Make emailaddr, recipaddr, EmailUser, and EmailPass become instance variables by adding prefix "self.".

class Email_Stuff():
    def Get_From_Email(self):
        #code to open up window and get email address
        self.emailaddr = #the input
    def Get_To_Email(self):
        #code to open up window and get to email address
        self.recipaddr = #the input
    def Get_Email_Address(self):
        #code to open up window and get email username
        self.EmailUser = #the input
    def Get_Email_Password(self):
        #code to open up window and get email password
        self.EmailPass = #the input
    def Send_Email(self):
        import smtplib
        server = smtplib.SMTP('smtp.gmail.com', 587)
        server.login((self.EmailUser),(self.EmailPass))
        message = "Python Test Email"
        server.sendmail(self.emailaddr,self.recipaddr,self.message)

instance = Email_Stuff()
instance.Get_From_Email()
instance.Get_To_Email()
instance.Get_Email_Address()
instance.Get_Email_Password()
instance.Send_Email()

BTW, name of methods should be lowercase.

Answer 2

First, if you want these functions to methods associated with an instance of this class, then each method will need a reference to the instance itself as the first argument, usually designated as self , though you can name it anything you like.

For example:

 def Get_Email_Password(self):
    #code to open up window and get email password
    EmailPass = #the input
    return EmailPass

Next, you have two options to get the values ready for sendmail . You can either call each method from within the Send_Email method and store the returned values for each one. That would look like this:

def Send_Email(self):
    emailaddr = self.Get_For_Email()
    recipaddr = self.Get_Email_Address()
    ...

Or you can store the values, instead of returning them, as instance variables. So, you would have something like this:

 def Get_Email_Password(self):
    #code to open up window and get email password
    EmailPass = #the input
    self.emailaddr = EmailPass

And then, in your Send_Email method, you would reference the instance variables you have saved:

def Send_Email(self):
    ...
    server.sendmail(self.emailaddr, self.recipaddr, self.message)

How you choose to do it is up to you, but I prefer the first way. I also suggest you read up on PEP8