Get multiplier to get jobs
       only for samples that have input

def _get_multiplier(samples):
    """Get multiplier to get jobs
       only for samples that have input
    """
    to_process = 1.0
    to_skip = 0
    for sample in samples:
        if dd.get_phenotype(sample[0]) == "chip":
            to_process += 1.0
        elif dd.get_chip_method(sample[0]).lower() == "atac":
            to_process += 1.0
        else:
            to_skip += 1.0
    mult = (to_process - to_skip) / len(samples)
    if mult <= 0:
        mult = 1 / len(samples)
    return max(mult, 1)