Why do i keep getting this error message?

Question

Hi i get this error: name 'passwords' is not defined when im about to check passwords that i have saved. Why do i get the error?

def login_or_register(self):

    user_input = input("Login or Register: ")

    if user_input == "login":
        self.login2()
    elif user_input == "register":
        pass
    else:
        print("Try again!")
        self.login_or_register()


def add_password(self):

    global sitepassword
    global site
    Site = input("Enter site name: ")
    sitepassword = input("Enter password")
    self.add_password_orCheck_password()

    global passwords
    self.passwords = {Site: sitepassword}

def check_passwords(self):
    which_password = input("Which sites password do you want to see?")
    for Site in passwords:
        if which_password in passwords:
            print(sitepassword)
            self.add_password_orCheck_password()




def add_password_orCheck_password(self):
    add_new = input("Do you want to add a password or check passwords?")
    if "add a password" in add_new:
        self.add_password()
    elif "check passwords" in add_new:
        self.check_passwords()



Matt = User("Matterson", "matt@gmail.com", "21.12.1999" ,"male", "Password987")
session1 = Matt.login_or_register()

Answer 1

In check_passwords , the passwords variable is still local. Yes, you declared it global in another, but you also need to declare it in each function that uses the global variable.

Answer 2

在check_passwords ，变量仍然是局部的，因此在引用变量之前，您需要在每个方法中使用global passwords 。