class MyException(Exception):def __init__(self,msg):self.msg=msgdef __str__(self):return self.msgtry:print('start')raise MyException('this is a custom exception')##手動觸發會被Exception捕獲 except Exception as e:print(e) finally:print('end')

##ret start this is a custom exception end import time try:print('start...')time.sleep(10) except KeyboardInterrupt as e:##按ctrl+c會執行這個語句塊print('you press ctrl+c') finally:print('end...')


myexception=MyException('231') print(hasattr(myexception,'msg'))#True print(hasattr(myexception,'msg1'))#False print(getattr(myexception,'__str__')())#231 setattr(myexception,'fun',lambda x:x) print(getattr(myexception,'fun')(1234))#1234 delattr(myexception,'fun')

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try: l = ["a", "b"] int(l[2]) except (ValueError, IndexError) as e: pass

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轉載于:https://www.cnblogs.com/howhy/p/7828340.html

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