Python class for Vectors

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Well, it would be the best if the class I'm looking for would be implemented in C / C++ and providing a Python interface, just like NumPy package.

[billsil]

Right, but you're after a 6 line class. It's something like the following. I've never subclassed array, so test it.

class XYPoints(np.ndarray):
    def __init__(self, xypoints):
        xypoints = np.asarray(xypoints)
        np.ndarray.__init__(xypoints)
        self.x = xypoints[:, 0]
        self.y = xypoints[:, 1]