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showthesunli/apply_many.py Secret

Last active November 9, 2022 06:19
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apply_many.py
def apply_many(f):
"""Write a generator function apply_many that takes in a one-argument function f and at the nth yield,
it yields a fcuntion that applies f n times. For example, it first yield f(), f(f()), f(f(f())), etc ...
>>> f = lambda x: x*2
>>> gen = apply_many(f)
>>> [next(gen)(1) for _ in range(3)]
[2, 4, 8]
"""
yield f
for func in apply_many(f):
yield lambda arg: f(func(arg))
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