kv_login with just python

kv_py_login

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.textinput import TextInput

class TutorialApp(App):
    def build(self):
        main_layout = BoxLayout(orientation="vertical")
        user_layout = BoxLayout(orientation="horizontal",
                                padding=15,
                                spacing=5)
        password_layout = BoxLayout(orientation="horizontal",
                                    padding=15,
                                    spacing=5)
        spacer = BoxLayout(orientation="vertical")
        
        # layout the username widgets
        username_lbl = Label(text="Username:")
        user_layout.add_widget(username_lbl)
        
        self.username_txt = TextInput(font_size=80,
                                      size_hint_y=None,
                                      height=110)
        user_layout.add_widget(self.username_txt)
        main_layout.add_widget(user_layout)
        
        # layout the password widgets
        password_lbl = Label(text="Password:")
        password_layout.add_widget(password_lbl)
        
        self.password_txt = TextInput(font_size=80,
                                      size_hint_y=None,
                                      height=110,
                                      password=True)
        password_layout.add_widget(self.password_txt)
        main_layout.add_widget(password_layout)
        
        # add login button
        login_button = Button(text="Login",
                              size_hint_x=None,
                              width=300,
                              pos_hint={'center_x':0.5})
        login_button.bind(on_press=self.on_login)
        main_layout.add_widget(login_button)
        
        main_layout.add_widget(spacer)
        return main_layout
    
    #----------------------------------------------------------------------
    def on_login(self, button):
        """"""
        username = self.username_txt.text
        password = self.password_txt.text
        
        if username == "admin" and password == "admin":
            print "You're logged in and you have a really bad password!"
        else:
            print "Username or password is not correct!"
    
if __name__ == "__main__":
    TutorialApp().run()