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class Point: def __main__(self, x=0, y=0): self.x = x self.y = y def distance_from origin(self): return ((x ** 2) + (y ** 2)) ** 0.5 def distance_between_points(a, b): return distance_from_origin(a) - distance_from_origin(b) I get a global variable error when I try to run the function at the bottom.
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