kivy实现异步操作

本是古典何须时尚 2022-04-24 06:14 161阅读 0赞

from kivy.app import App
    from kivy.uix.button import Button
    from kivy.uix.label import Label
    from kivy.uix.gridlayout import GridLayout
    import time
    
    from async_gui.engine import Task, MultiProcessTask
    from async_gui.toolkits.kivy import KivyEngine
    
    from cpu_work import is_prime, PRIMES
    
    
    engine = KivyEngine()
    
    class MyApp(App):
        def build(self):
            grid = GridLayout(cols=4)
    
            grid.add_widget(Button(text='Check Primes',
                                   on_press=self.cpu_bound))
            self.status = Label(text='Status')
            grid.add_widget(self.status)
            return grid
    
        @engine.async
        def cpu_bound(self, *_):
            t = time.time()
            self.status.text = "calculating..."
            prime_flags = yield MultiProcessTask(
                [Task(is_prime, n) for n in PRIMES] #Task的参数，is_prime是函数，n是is_prime的参数，[Task(is_prime, n)返回is_prime函数运行结果
            )
            print(time.time() - t)
            text = '\n'.join("%s: %s" % (n, prime)
                             for n, prime in zip(PRIMES, prime_flags))
            self.status.text = text
    
    if __name__ == '__main__':
        MyApp().run()

参考1：[Using Asynchronous programming inside a Kivy application][]  
参考2：[async\_gui][async_gui]

[Using Asynchronous programming inside a Kivy application]: https://github.com/kivy/kivy/wiki/Using-Asynchronous-programming-inside-a-Kivy-application
[async_gui]: https://github.com/reclosedev/async_gui