On Nov 10, 11:33 am, Jennie <namedotpor...@gmail.com> wrote: > What is the best solution to solve the following problem in Python 3.3? > > import math > >>> class Point: > ... def __init__(self, x=0, y=0): > ... self.x = x > ... self.y = y > ... def __sub__(self, other): > ... return Point(self.x - other.x, self.y - other.y) > ... def distance(self, point=Point()): > ... """Return the distance from `point`.""" > ... return math.sqrt((self - point).x ** 2 + (self - point).y ** 2)
Before you do anything else, introduce a Vector class into your app. The difference between two Points is not a Point; it's a Vector. Create a magnitude() method in your Vector class, then make your Point.distance return the results of Vector.magnitude(self - other). To define the distance of a point from the origin, don't make your distance() method have default arguments; instead, define another method called distance_from_origin(). -- http://mail.python.org/mailman/listinfo/python-list
