[Python] pyserial Thread protocol relaunch conection

I've ans issue with pyserial threaded protocol I've overloaded protocol class (no detail on what is protocol is relevant here)

class myProtocol(Protocol):
def __init__(self):
super().__init__()
self._reader:ReaderThread=None
self._frontend:MK3FrontEnd=None

def connection_made(self, transport):
super(myProtocol, self).connection_made(transport)
self._reader=transport

def connection_lost(self, exc):
print("Connexion Lost")

def data_received(self, data):
super().data_received(data)
def probe(self):
pass # donc care for now


in my main() function I'm starting serial and reader thread like follows :

port=args.port
try:
serial_instance = serial.serial_for_url(port, default_baudrate, write_timeout=1)
except serial.SerialException as e:
sys.stderr.write('could not open port\n')
exit()
try:
with ReaderThread(serial_instance, myProtocol) as Listener:
Listener.setPortBaudrate(port,default_baudrate)
Listener.Probe() # special function of my own to exchange a packet to
# iddentify if it's the device I hope or not
time.sleep(0.5) # time to wait response
if not(Listener.ProbeOk):
raise Exception('notGoodDevice')
else:
sys.stderr.write(f"MK3 Rx Found on {port}\n")
Keyblistener = keyboard.Listener(on_press=on_press,on_release=on_release)
Keyblistener.start()
try:
while True: # keep the reader alive until user press CTRL-C
time.sleep(1)
except KeyboardInterrupt:
print("kill process");
except:
sys.stderr.write('this is not a reciever\n')
exit()


my point is that in case of serial error I well receive the connexion_lost() event in the protocol object but I dont find any solution to try and retry serial open until it's comming back I can close and reopen serial in case of a connexion lost but I dont find any good way to get a reader thread back as threads can only be start one time and I cant go back to main thread to re create a new reader thread do you have any idea to make it pythonic style ?? thank's for any idea

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