Windows 7 在Python中临时COM端口断开后幸存

当我从PC上拔下USB/Arduino时，从中删除的Python脚本崩溃

#The connection to the Arduino
ser = serial.Serial('COM19',9600)

#Not connected to Arduino before connection is made
connected = False

#Loop until the Arduino is connected
while not connected:
    serin = ser.read()
    connected = True

#Debug Arduino connection
if connected == True:
    pprint('connected to arduino')

我曾尝试使用TRY/EXCEPT来确保连接重新连接，但当Arduino再次插入时，它将无法识别COM端口，直到计算机复位

from pprint import pprint
import time
import serial

while True:
    #The connection to the Arduino
    try:
        ardResponse = serial.Serial('COM19',9600)
    except IOError:
        connected = False
        pprint('Arduino not connected to COM3')
        time.sleep(10)
    continue
    serin = ser.read()
    connected = True
    pprint('Connected to Arduino')
    ser.write('1')
    while ser.read() == '1':
        ser.read()
    pprint ('Arduino has finished being flashed')

    ser.close()
    pprint('Connection closed')

    time.sleep(5)

这是因为COM端口保持打开状态，因此脚本无法重用它吗？有没有办法避免此问题？

尝试在except:块中执行ser.close（） 然后提示用户进行修复，并在再次尝试ser.open（）之前按enter键