def irange(start_or_stop, stop=None, step=None):
    if stop is not None:
        start = start_or_stop
        if step is not None:
            return _irange(start, stop, step)
        else:
            return range(start, stop + 1)
    else:
        stop = start_or_stop
        if step is not None:
            raise ValueError('`stop` is None')
        else:
            return range(stop + 1)


def _irange(start, stop, step):
    if step == 0:
        raise ValueError('`step` must not be zero')
    adjust = 1 if step > 0 else -1
    return range(start, stop + adjust, step)