在运行简单的乒乓教程时,Kivy出现Typer错误

时间:2017-03-01 14:01:41

标签: python kivy kivy-language

我正在学习使用kivy和python。我正在按照本教程创建一个简单的乒乓球游戏

https://kivy.org/docs/tutorials/pong.html

当我到达我试图为球制作动画的部分时。我完全按照教程编写了代码。我使用F5从IDLE运行程序,我得到了一个

return game()
Type Error: 'PongGame' object is not callable 
交互式shell中的

消息和游戏本身的窗口冻结。有关如何解决此问题的任何想法?提前致谢

这是我写的代码(完全和教程一样): -

main.py的代码

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.properties import NumericProperty, ReferenceListProperty,\
ObjectProperty
from kivy.vector import Vector
from kivy.clock import Clock
from random import randint


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):
    ball = ObjectProperty(None)

    def serve_ball(self):
      self.ball.center = self.center
      self.ball.velocity = Vector(4, 0).rotate(randint(0, 360))

   def update(self, dt):
      self.ball.move()

      # bounce off top and bottom
      if (self.ball.y < 0) or (self.ball.top > self.height):
          self.ball.velocity_y *= -1

      # bounce off left and right
      if (self.ball.x < 0) or (self.ball.right > self.width):
          self.ball.velocity_x *= -1


class PongApp(App):
    def build(self):
       game = PongGame()
       game.serve_ball()
       Clock.schedule_interval(game.update, 1.0 / 60.0)
       return game


if __name__ == '__main__':
    PongApp().run()

pong.kv的代码

#:kivy 1.0.9

<PongBall>:
    size: 50, 50 
canvas:
    Ellipse:
        pos: self.pos
        size: self.size          

<PongGame>:
    ball: pong_ball

    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"

   PongBall:
      id: pong_ball
      center: self.parent.center

1 个答案:

答案 0 :(得分:0)

在您的文件(Python和kv)中,您有多个身份错误。将您的代码与原始代码进行比较,您会发现错误。

有关身份识别的更多信息,请查看此处:https://www.python.org/dev/peps/pep-0008/#indentation