login_page.py

class UsernameField(PageComponent):
    _locator = (By.ID, "username")
                
class PasswordField(PageComponent):
    _locator = (By.ID, "password")

class LoginForm(PageComponent):
    _locator = (By.ID, "login-form)
    username = UsernameField()
    password = PasswordField()
    def fill_out(self, credentials: Credentials):
        self.username = credentials.username
        self.password = credentials.password

class LoginPage(Page):
    login_form = LoginForm()
    def login(self, credentials: Credentials):
        self.login_form.fill_out(credentials)
        self.login_form.submit()