运行python xxx.py时出现以下错误消息。如何解决,非常感谢。
c:\ Python27> python xxx.py Traceback(最近一次调用最后一次): 文件" test.py",第34行,in 打印播放器(1,0,10) TypeError:' NoneType'对象不可调用
以下是xxx.py:
def create(pos=[0,0]):
def player(dir_x,dir_y,step):
new_x = pos[0] + dir_x*step
new_y = pos[1] + dir_y*step
pos[0] = new_x
pos[1] = new_y
return pos
return player
if __name__ == '__main__':
player = create()
print player(1,0,10)
print player(0,1,20)
print player(-1,0,10)
答案 0 :(得分:1)
除了缩进之外,您的代码没有任何问题。正确的是:
def create(pos=[0,0]):
def player(dir_x,dir_y,step):
new_x = pos[0] + dir_x*step
new_y = pos[1] + dir_y*step
pos[0] = new_x
pos[1] = new_y
return pos
return player
if __name__ == '__main__':
player = create()
print player(1,0,10)
print player(0,1,20)
print player(-1,0,10)
打印:
[10, 0]
[10, 20]
[0, 20]