如何在函数内部调用函数？

Question

import datetime

class User:

    def __init__(self, username, mail, date_of_birth, gender, password):
        self.username = username
        self.mail = mail
        self.date_of_birth = datetime.datetime.strptime(date_of_birth, "%d.%m.%Y").date()
        self.gender = gender
        self.password = password

    def get_username(self):
        return self.username

    def get_mail(self):
        return self.mail

    def get_date_of_birth(self):
        return self.date_of_birth
    def get_gender(self):
        return self.gender

    def get_password(self):
        self.password

    def get_date(self):
        return self.date_of_birth

    log = ""


    def login2(self):

        global log
        log = input("input your username: ")
        if log == self.username:
            pwrd = input("whats your password?")
            if pwrd == self.password:
                print("Logged in!")


    @staticmethod
    def login_or_register():

        global log

        log = input("login or register: ")
        if log == "login" or "Login":
            login2()

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

So the login2() wont work for some reason. Could someone help me out?

Answer 1

I'm not sure of your intent, but you could make this a class method that creates an instance of its class.

@classmethod
def login_or_register(cls):
    log = input("login or register: ")
    if log == "login" or "Login":
        user = cls()
        user.login2()
        return user

But from the way you use it

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

I think it should just be a regular method

def login_or_register(self):
    log = input("login or register: ")
    if log == "login" or "Login":
        self.login2()

Answer 2

You can't call an instance method from a class method. Login2 can be an instance method as well. Then instead of calling it statically, call it on the Matt instance as follows.

import datetime

class User:

    def __init__(self, username, mail, date_of_birth, gender, password):
        self.username = username
        self.mail = mail
        self.date_of_birth = datetime.datetime.strptime(date_of_birth, "%d.%m.%Y").date()
        self.gender = gender
        self.password = password

    def get_username(self):
        return self.username

    def get_mail(self):
        return self.mail

    def get_date_of_birth(self):
        return self.date_of_birth
    def get_gender(self):
        return self.gender

    def get_password(self):
        self.password

    def get_date(self):
        return self.date_of_birth

    log = ""


    def login2(self):

        global log
        log = input("input your username: ")
        if log == self.username:
            pwrd = input("whats your password?")
            if pwrd == self.password:
                print("Logged in!")

    def login_or_register(self):

        global log

        log = input("login or register: ")
        if log == "login" or "Login":
            self.login2()

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