geometry.py 文件源码

def __mul__(self, other):
        """Multiply a Point with a constant.
        >>> 2 * Point(1,2)
        (2.000,4.000)
        >>> Point(1,2) * Point(1,2) #doctest:+IGNORE_EXCEPTION_DETAIL
        Traceback (most recent call last):
            ...
        TypeError:
        """
        if not isinstance(other, numbers.Real):
            return NotImplemented
        return Point(self.x * other, self.y * other)