Python+webdriver+selenium cannot get the value of the driver attribute

There are two programs in < H1 >. The attribute driver = webdriver.Firefox (), has been defined in baidu_main.py and public.py,baidu_main.py, but the attribute value of driver cannot be read normally in public.py. What is the reason for this? I have already written the constructor in baidu_main.py? < / H1 > < H1 > the baidu_main.py code is as follows: < / H1 >
from selenium import webdriver
from public import Login
class Logintest():
    def __init__(self):
        self.driver = webdriver.Firefox()
        self.driver.get("https://segmentfault.com/")
    def test_admin_login(self):
        username = "XXXXXX"
        password = "XXXXXX"
    Login().user_login(self.driver,username,password)
    Login().user_logout(self,driver)
abc = Logintest()
abc.test_admin_login()
< H1 > the public.py code is as follows: < / H1 >
from selenium import webdriver
import time
class Login():
    def user_login(self, driver, username, password):
        try:
            self.driver.find_element_by_xpath("/html/body/div[3]/nav/div[2]/div[2]/ul/li/a[1]").click()  -sharp 
            self.driver.find_element_by_xpath("/html/body/div[6]/div/div/div[2]/div/div/div/form/div[2]/input").send_keys(
        username)  -sharp 
            self.driver.find_element_by_xpath("/html/body/div[6]/div/div/div[2]/div/div/div/form/div[3]/input").send_keys(
        password)  -sharp 
            self.driver.find_element_by_xpath(
        "/html/body/div[6]/div/div/div[2]/div/div/div/form/div[4]/button").click()  -sharp 
        except Exception:
            print("No found everything, sorry2!")
        else:
            time.sleep(10)
    def user_logout(self, driver):
        self.driver.quit()
Mar.28,2021

the foundation needs to be strengthened.

give me an example

class LoginTest(object):
    def __init__(self):
        self.driver = ...
        
    def test_xxx(self):
        Login().call_me(self.driver)
        -sharp  
        -sharp Login().call_me(self, driver)
        
        
class Login(object):
    def call_me(self, driver):
        driver.xxx(...)
In the Login of

public, self.driver should be driver,. If you use self.driver, you will not have driver in the parameters.

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