class Ball: def _init_(self, color, size,direction): self.color = color self.size = size self.direction = direction def _str_(self): msg = "Hi, I'm a " + self.size + "" +self.color + "ball!" return msg myBall = Ball("size", "small", "down") print myBall
运行时提示出错:Traceback (most recent call last):
File "C:/Python27/dfkjdk.py", line 11, in <module>
myBall = Ball("size", "small", "down")
TypeError: this constructor takes no arguments
帮忙看看有什么地方写错了。
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