def pi(N): cs = itertools.cycle([4,-4]) odd = itertools.count(1,2) sum = 0 for i in range(N): sum += (next(cs)/next(odd)) return sum
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冲浪小白兔
def pi(N): cs = itertools.cycle([4,-4]) odd = itertools.count(1,2) sum = 0 for i in range(N): sum += (next(cs)/next(odd)) return sum