Код:
from kivy.app import App
from kivy.uix.widget import Widget
class PongBall(Widget):
velocity_x = NumericProperty(0)
velocity_y = NumericProperty(0)
velocity = ReferenceListProperty(velocity_x, velocity_y)
def move(self):
self.pos = Vector(*self.velocity) + self.pos
class PongGame(Widget):
pass
class PongApp(App):
def build(self):
return PongGame()
if __name__=='__main__':
PongApp().run()
Кв файл:
#:kivy 1.11.1
<PongBall>:
size:50,50
canvas:
Ellipse:
pos:self.pos
size:self.size
<PongGame>:
canvas:
Rectangle:
pos:self.center_x-5,0
size:10,self.height
Label:
font_size:70
center_x:root.width / 4
top:root.top-50
text:"0"
Label:
font_size: 70
center_x: root.width * 3 / 4
top:root.top - 50
text:"0"
Сама ошибка:
Traceback (most recent call last):
File "main.py", line 4, in <module>
class PongBall(Widget):
File "main.py", line 5, in PongBall
velocity_x = NumericProperty(0)
NameError: name 'NumericProperty' is not defined
