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1. Python 函数式编程¶

功能	解释
`@functools.cache(user_function)`
`@functools.cached_property(func)`
`functools.cmp_to_key(func)`
`@functools.lru_cache(user_function)`
`@functools.lru_cache(maxsize=128, typed=False)`
`@functools.total_ordering`
`functools.partial(func, /, args, *keywords)`
`class functools.partialmethod(func, /, args, *keywords)`
`functools.reduce(function, iterable[, initializer])¶`
`@functools.singledispatch`
`class functools.singledispatchmethod(func)`
`functools.update_wrapper(wrapper, wrapped, assigned=WRAPPER_ASSIGNMENTS, updated=WRAPPER_UPDATES)`
`@functools.wraps(wrapped, assigned=WRAPPER_ASSIGNMENTS, updated=WRAPPER_UPDATES)¶`

功能	解释
`itertools.accumulate(iterable[, function, *, initial=None])`
`itertools.batched(iterable, n)`
`itertools.chain(*iterables)`
`classmethod chain.from_iterable(iterable)`
`itertools.combinations(iterable, r)`
`itertools.combinations_with_replacement(iterable, r)`
`itertools.compress(data, selectors)`
`itertools.count(start=0, step=1)`
`itertools.cycle(iterable)`
`itertools.dropwhile(predicate, iterable)`
`itertools.filterfalse(predicate, iterable)`
`itertools.groupby(iterable, key=None)`
`itertools.islice(iterable, stop)`
`itertools.islice(iterable, start, stop[, step])`
`itertools.pairwise(iterable)`
`itertools.permutations(iterable, r=None)`
`itertools.product(*iterables, repeat=1)`
`itertools.repeat(object[, times])`
`itertools.starmap(function, iterable)`
`itertools.takewhile(predicate, iterable)`
`itertools.tee(iterable, n=2)`
`itertools.zip_longest(*iterables, fillvalue=None)`