Python (VII) Python classes, objects, and python exception handling mechanism
編輯：Python
Python Exception handling mechanism of
Python Common types of exceptions
try except structure
Exceptions are caught in the order of subclass first and then parent class , To avoid missing possible exceptions , It can be added at the end BaseException
try:
n1=int(input(' Please enter an integer :'))
n2=int(input(' Please enter an integer :'
