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Import Exception# except catches error exceptions according to specific error types # multiple different types of exceptions can be caught with one block # EXception can catch all exceptions when the problem or error is uncertain, you can use this kind of print (dir (Exception)) try: # print (b) # capture logic code li= [1line 2 3] print (li [10]) passexcept NameError as msg: # only the errors caught will execute print (msg) passexcept IndexError as msg: print (msg) print ('abnormal first contact') print ('HAHAHAHAHHAHAHAH') here.

Try: # print (b) # Code for capturing logic # li= [1 li [10]) # print (li [10]) print (msg) passexcept IndexError as msg: print (msg) passexcept ZeroDivisionError as msg: print (msg) print ('first contact exception') print ('HAHAHAHAHHAHAHAH')

Exception type

Try: print (b) # Code for capturing logic # li= [1mai 2 3Jere 4] # print (li [10]) # axiom 10Accord0 pass# except NameError as msg:# # will execute # print (msg) # pass# except IndexError as msg:# print (msg) # pass# except ZeroDivisionError as msg:# print (msg) # passexcept Exception as msg: print (msg) passprint ('abnormal first contact') print ('HAHAHAHAHHAHAHAH')

Def A (s): return 10/int (s) passdef B (s): return A (s) * 2def main (): try: B ('0') pass except Exception as msg: print (msg) pass passmain () # does not need to capture in every possible error place As long as the error is caught at the appropriate level, it will greatly reduce the trouble for us to write try----exception # exception throwing mechanism # if the exception interpreter occurs at run time, it will look for the corresponding exception capture type # if it is not found in the current function, it will pass the exception to the upper calling function # if it is not found in the outermost layer The interpreter will exit the program down and drop it.

Class ToolongmyException (Exception): # Custom exception def _ _ init__ (self Leng):'': param leng: length''self.len=leng passdef _ _ str__ (self): return' the data length you entered is'+ str (self.len) + 'has exceeded the length' passdef name_Test (): name=input ('Please enter name:') if len (name) > 5: raise ToolongmyException (len ( Name)) # throw exception else: print (name) pass passname_Test ()

Class ToolongmyException (Exception): # Custom exception def _ _ init__ (self Leng):'': param leng: length''self.len=leng passdef _ _ str__ (self): return' the data length you entered is'+ str (self.len) + 'has exceeded the length' passdef name_Test (): name=input ('Please enter name:') try: if len (name) > 5: Raise ToolongmyException (len (name)) # throws an exception else: print (name) pass except ToolongmyException as result: print (result) pass finally: print ('finished') passname_Test ()

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