python3 自动识别usb连接状态,即对usb重连的判断方法

import os
from time import sleep
 
# 获取设备id列表
def getdevlist():
  devlist = []
  connectfile = os.popen('adb devices')
  list = connectfile.readlines()
  # print(list)
  for i in range(len(list)):
    if list[i].find('\tdevice') != -1:
      temp = list[i].split('\t')
      devlist.append(temp[0])
  return devlist
 
 
connectdevice = input('请输入每次要同时连接的设备数:')
number = int(connectdevice.strip())
 
while True:
  lists = getdevlist()
  devnum = len(lists)
  id = 1
  tempdevlist = getdevlist()
  if devnum < number:
    print(f'\n设备未全部识别，应识别{number}台设备!\n当前已识别{devnum}台设备,请连接设备并等待识别:\n\n')
    for i in range(devnum):
      print(f'设备{id}: {lists[i]}')
      id = id + 1
  # 等待识别所有设备
  while devnum < number:
    lists = getdevlist()
    curnum = len(lists)
    if curnum > devnum:
      for i in range(len(lists)):
        if lists[i] not in tempdevlist:
          print(f'设备{id}: {lists[i]}')
          id = id + 1
          tempdevlist = getdevlist()
      devnum = curnum
    
  print(f'\n所有设备已全部识别!当前有连接{len(getdevlist())}台设备.\n\n')

import os
from time import sleep
 
def reconnectAction(deviceid):
  devlist = getdevlist()
  print(f'设备{deviceid}正在尝试重连.')
  id = 1
  while deviceid not in devlist:
    print(f'第{id}次 ', end = ' ')
    devtuple = getdevlist()
    id = id + 1
  print(f'\n设备{deviceid}重新建立连接成功.')
  sleep(1)
 
 
# example:
if __name__ == '__main__':
  deviceid = '12lk34fkjaaf'
  if clickScreen(openfilemanager, deviceid) != 0:
    print(f'{openfilemanager[1]}:执行失败‘)
    reconnectAction(deviceid)
    clickScreen(openfilemanager, deviceid)