Python / Kivy App running only once
问题 I'm running a very simple python (3.5) script using Spyder IDE from Anaconda platform. from kivy.app import App from kivy.uix.label import Label from kivy.uix.gridlayout import GridLayout from kivy.uix.textinput import TextInput class LoginScreen(GridLayout): def __init__(self, **kwargs): super(LoginScreen,self).__init__(*kwargs) self.cols = 2 self.add_widget(Label(text='Username')) self.username = TextInput(multiline=False) self.add_widget(self.username) self.add_widget(Label(text='Password'