我正在使用pysdl2库。 self.velocity会打印,但self.forward_tick抛出一个关键错误。sdl2实体的错误设置属性
是什么导致只有一部分自我属性被分配。我认为这与继承有关。
class Robot(sdl2.ext.Entity):
def __init__(self, world, sprite, posx=0, posy=0):
self.sprite = sprite
self.sprite.position = posx, posy
self.velocity = Velocity()
self.forward_tick = 0
self.go_forward = 0
self.unit_forward = (1,0)
print(self.velocity)
print(self.forward_tick)
这里是输出:
Collins-MacBook-Air:soccer_bots collinbell$ python test_simulation_world.py
<simulation_world.Velocity object at 0x108ecb5c0>
Traceback (most recent call last):
File "/Users/collinbell/.pyenv/versions/3.4.3/lib/python3.4/site-packages/sdl2/ext/ebs.py", line 53, in __getattr__
ctype = self._world._componenttypes[name]
KeyError: 'forward_tick'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "test_simulation_world.py", line 3, in <module>
world = Simulation_World("Test Simulation", 1080, 720)
File "/Users/collinbell/Programs/soccer_bots/simulation_world.py", line 100, in __init__
self.player1 = Robot(self.world, sp_paddle1, 0, 250)
File "/Users/collinbell/Programs/soccer_bots/simulation_world.py", line 22, in __init__
print(self.forward_tick)
File "/Users/collinbell/.pyenv/versions/3.4.3/lib/python3.4/site-packages/sdl2/ext/ebs.py", line 56, in __getattr__
(self.__class__.__name__, name))
AttributeError: object ''Robot'' has no attribute ''forward_tick''