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#!/usr/bin/env pythonfrom __future__ import divisionfrom math import sqrtRADIUS = 1000def quarter_circle_method():    dots = 0    for x in xrange(RADIUS):        for y in xrange(RADIUS):            if sqrt( x**2 + y**2 ) <= RADIUS:                dots += 1    Pi = (4*dots) / (RADIUS**2)    return Piif __name__ == "__main__":    print quarter_circle_method()