python: kivy app not closing
<p>my kivy simple hello world app is not closing I'm using raspberry pi B and I can't close it I must unplug my raspberry pi 5v adapter to close it</p>

<p>I'm using rasbian jessie
this is the very simple code </p>

<pre><code>import kivy
from kivy.app import App
from kivy.uix.label import Label

class mamdouh(App):
    def build(self):
        return Label(text='mamdouh')

if __name__=='__main__':
    mamdouh().run()
</code></pre>