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Best way to represent a point


I have a point p1(x1, y1) and a point p2(x2, y2). For example I want p1 = 2 * p2 For the moment I store the points in lists so I have to do like: p1[0] = 2 * p2[0] p1[1] = 2 * p2[1] It's very ugly. What's the best way to do that ? Thanks in advance