How to use the aioitertools.itertools.combinations function in aioitertools

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github jreese / aioitertools / aioitertools / itertools.py View on Github external
async def combinations(itr: AnyIterable[T], r: int) -> AsyncIterator[Tuple[T, ...]]:
    """
    Yield r length subsequences from the given iterable.

    Simple wrapper around itertools.combinations for asyncio.
    This will consume the entire iterable before yielding values.

    Example:

        async for value in combinations(range(4), 3):
            ...  # (0, 1, 2), (0, 1, 3), (0, 2, 3), (1, 2, 3)

    """
    pool: List[T] = await list(itr)
    for value in itertools.combinations(pool, r):
        yield value