PYTHON 得到ADB的输出结果

#利用ADB DEVICES结果判断指定手机是否正常连接，如果为offline,则adb disconnect sjh；adb connect sjh
#如果没有，则执行adb connect sjh
def jianchaad(sjh):
    aakk="adb devices"
    zh=[]
    lx=[]
    p = subprocess.Popen(aakk, shell=True, stdout=subprocess.PIPE)
    out, err = p.communicate()
    #print(out.splitlines()[24:27])
    for line in out.splitlines():
        if "offline" in line.decode('utf-8'):  #decode()将byte转化为str,encode()则相反
            av=line.decode('utf-8').replace(" ","").replace("device","").replace(":5555","")
            lx.append(av)
        if "device" in line.decode('utf-8') and "List" not in line.decode('utf-8') and "offline" not in line.decode('utf-8') :
            #print(line.decode('utf-8'))
            av=line.decode('utf-8').replace(" ","").replace("device","").replace(":5555","")#替换掉所有的空格,device, :5555
            zh.append(av)
            #print(av,len(av))
    if sjh in lx:#检查离线状态的
        aaak="adb disconnect {0}".format(sjh)
        process = subprocess.Popen(aaak,shell=True)
        time.sleep(5)
        aaak="adb connect {0}".format(sjh)
        process = subprocess.Popen(aaak,shell=True)
    else:
        if sjh not in zh:
            aaak="adb connect {0}".format(sjh)
            process = subprocess.Popen(aaak,shell=True)