我具有此功能来获取linux上的CPU使用率， 而split函数使我感到困惑。

    try:
    pipe = os.popen("ps aux --sort -%cpu,-rss")
    data = pipe.read().strip().split('\n')
    print(data)
    pipe.close()
    usage = [i.split(None,10) for i in data]
    print(usage)
    del usage[0]

    total_usage = []

    for element in usage:
        usage_cpu = element[2]
        total_usage.append(usage_cpu)

    total_usage = sum(float(i) for i in total_usage)

    total_free = ((100 * int(get_cpus()['cpus'])) - float(total_usage))

    cpu_used = {'free': total_free,'used': float(total_usage)}

    data = cpu_used

except Exception as err:
    data = str(err)

return data

我需要了解这条线   用法= [i.split（None，10）for i in data]

预先感谢