from typing import Generator, List


def fib() -> Generator:
    """Generates fibonacci sequence."""
    a = 0
    b = a + 1

    yield a
    yield b

    while True:
        c = a + b
        a = b
        b = c
        yield c


def from_position(seq: Generator, start_from: int = 0) -> Generator:
    """Generates sequence starting from position."""
    counter = 0
    while True:
        counter += 1
        if start_from < counter:
            yield next(seq)
        else:
            next(seq)


def get_fib_array(length: int, start_from: int = 0) -> List[int]:
    """Generates fibonacci sequence of length starting from position."""
    _seq = fib()
    gen_from_pos = from_position(_seq, start_from)
    return [next(gen_from_pos) for _ in range(length)]


if __name__ == '__main__':
    _sequence = fib()
    print([next(_sequence) for _ in range(10)])
    print(get_fib_array(5, 0))