如何从同一类中的另一个方法访问类中方法中的变量

Question

下面的代码没有错误或问题我想将此脚本“连接”到外部文件或数据库，以便在脚本执行后可以存储和使用“我的字典”的内容。我正在寻找如何实现这一点的想法。我不是要求修复代码，因为它是功能性的。它只是提供上下文。你知道吗

my_dict = {}


class password(object):
    def __init__(self):
        pass

    def username_input(self):
        self.user = str(input("Please enter the username you would like to use: "))
        return self.user
        #gets the input for a username


    def password_input(self):
        self.passw = str(input("Please enter the password you would like to use: "))
        return self.passw
        #gets the input for a password


    def username_creator(self):
        password.username_input(self)
        return self.user


    def password_creator(self):
        password.password_input(self)
        return self.passw

    def swap_username(self, new_pass, old_pass):
        my_dict[new_pass] = my_dict.pop(old_pass)

    def swap_password(self, new_pas, old_pas):
        my_dict[old_pas] = new_pas



    def username_change(self):
        self.d = input("please enter your username: ")
        for key in my_dict:
            if key == self.d:
                self.x = input("enter a  new username: ")
                password().swap_username(self.x, self.d)
                print("your username has been updated!")
                break

            else:
                print("the username you entered does not exist in our records")
                password().username_change()


    def password_change(self):
        self.e = input("please enter your username: ")
        self.q = input("please enter your password: ")
        for key, value in my_dict.items():
            if key == self.e and value == self.q:
                self.z = input("enter a new password: ")
                password().swap_password(self.z, self.e)
                break
            else:
                print ('the combination  entered does not exist in our records')
                password().password_change()



    make_a_username = password()
    my_dict.update({(make_a_username.username_creator()): (make_a_username.password_creator())})

Answer 1

实现这一点的一种方法是将my_dict存储在文件中。所以基本上，每次启动应用程序时，都要从文件中加载my_dict，然后在关闭之前，将更新的my_dict再次存储到文件中。因为它是一个字典，所以可以将它存储在JSON中。你知道吗

所以，你最终要做的是：

// to save
json_string = json.dumps(datastore)
// now write this string to a file

// to load, first read json_string from file. Then,
my_dict = json.loads(json_string)