[Python Cheatsheet] 28. itertools & functools - 자주 쓰는 조합

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from itertools import chain, islice

xs = chain([1, 2], [3, 4])
print(list(xs))

print(list(islice(range(100), 5)))  # [0, 1, 2, 3, 4]

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from itertools import groupby

data = ["a", "a", "b", "b", "b", "a"]
for k, g in groupby(data):
    print(k, list(g))  # 연속 구간 기준

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from functools import lru_cache, partial

@lru_cache(maxsize=1024)
def fib(n: int) -> int:
    return n if n < 2 else fib(n - 1) + fib(n - 2)

pow2 = partial(pow, 2)
print(pow2(10))  # 1024