I'm a fraud.

“ We can choose how we teach. We have to teach in a way that is fun. ”

Dr. Sue Rigby

    from __future__ import division
    import random
    class Drop():
        def __init__(self, r=1):
            self.x = (.5 - random.random()) * 2 * r
            self.y = (.5 - random.random()) * 2 * r
            self.incircle = (self.y) ** 2 + (self.x) ** 2 <= (r) ** 2

    N = 10000
    print 4 * len([k for k in range(N) if Drop().incircle]) / N