Update _4_PySerial_Exceptions.py
Update _4_PySerial_Exceptions.py

xanthium-enterprises/CrossPlatform-Serial-Port-Programming-using-Python-and-PySerial,xanthium-enterprises/CrossPlatform-Serial-Port-Programming-using-Python-and-PySerial,xanthium-enterprises/CrossPlatform-Serial-Port-Programming-using-Python-and-PySerial