fizzbuzz

import numpy

def naturals():
  n = 1
  while True:
    yield n
    n += 1

def mod_rule(gen, n, phrase):

  while True:
    for m in range(n-1):
      yield next(gen)
    next(gen)
    yield phrase

gen = naturals()
for n, phrase in zip([3,5,15],['fizz','buzz','fizzbuzz']):
  gen = mod_rule(gen, n, phrase)
numpy.array([next(gen) for n in range(100)])