Mark Dickinson <dicki...@gmail.com> added the comment:

Low priority, but it may also be worth updating the implementation of 
`Vec2D.__abs__`. It currently looks like this:

    def __abs__(self):
        return (self[0]**2 + self[1]**2)**0.5

But would be more robust if it used hypot:

    def __abs__(self):
        return math.hypot(self[0], self[1])

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue44734>
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