在线程之前打开 BoxLayout 并保持线程侦听

Question

我想要一个盒子布局，我将在其中放置一个文本，当我单击不同的键时，该文本应该会发生变化，Ritgth 现在我正在尝试在线程运行的同时显示 BoxLayout，但它没有显示 这是我的代码：

def funcion():
dev = InputDevice('/dev/input/by-id/usb-Logitech_USB_Keyboard-event-kbd')
# Provided as an example taken from my own keyboard attached to a Centos 6 box:
scancodes = {
# Scancode: ASCIICode
0: None, 1: u'ESC', 2: u'1', 3: u'2', 4: u'3', 5: u'4', 6: u'5', 7: u'6', 8: u'7', 9: u'8',
10: u'9', 11: u'0', 12: u'-', 13: u'=', 14: u'BKSP', 15: u'TAB', 16: u'Q', 17: u'W', 18: u'E', 19: u'R',
20: u'T', 21: u'Y', 22: u'U', 23: u'I', 24: u'O', 25: u'P', 26: u'[', 27: u']', 28: u'CRLF', 29: u'LCTRL',
30: u'A', 31: u'S', 32: u'D', 33: u'F', 34: u'G', 35: u'H', 36: u'J', 37: u'K', 38: u'L', 39: u';',
40: u'"', 41: u'`', 42: u'LSHFT', 43: u'\', 44: u'Z', 45: u'X', 46: u'C', 47: u'V', 48: u'B', 49: u'N',
50: u'M', 51: u',', 52: u'.', 53: u'/', 54: u'RSHFT', 56: u'LALT', 100: u'RALT'
}
for event in dev.read_loop():
if event.type == evdev.ecodes.EV_KEY:
data = evdev.categorize(event)  # Save the event temporarily to introspect it
if data.keystate == 1:  # Down events only
key_lookup = scancodes.get(data.scancode) or u'UNKNOWN:{}'.format(data.scancode)  # Lookup or return UNKNOWN:XX
print(u'You Pressed the {} key!'.format(key_lookup))  # Print it all out!

class Controller(BoxLayout):
def do_action(self):
self.label.text = 'After'
def do_action2(self):
self.label.text = 'Before' 
_thread.start_new_thread ( funcion() )


class MainApp(App):
title="Hola mundo"
def build(self):
return Controller()
if __name__=='__main__':
app= MainApp()
app.run()

Answer 1

问题是我以错误的方式做线程， 我在此页面中得到了问题的答案：https://github.com/gvalkov/python-evdev/issues/15