def reduce_helper(value, f, *a, **k):
    """
    Help in `reduce`.

    Helper function when applying `reduce` to a list of functions.

    Parameters
    ----------
    value : anything

    f : callable
        The function to call. This function receives `value` as first
        positional argument.

    *a, **k
        Args and kwargs passed to `f`.
    """
    return f(value, *a, **k)