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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def unit(self):
 """Return unit vector of a point."""

        s = self.x * self.x + self.y * self.y
        if s < 1e-5:
            return Point(0,0)
        s = math.sqrt(s)
        return Point(self.x / s, self.y / s)