Python Learning note Five: errors, debugging, and testing

1 #!/usr/bin/env python2 #Coding:utf-8 # Encoding3 4 'a test module'5 6 __author__='Sunflower'    7 8 9 #exception Error TypeTen #assertionerror Segmentation Errors One Try: AMy_list =['Zhangsan'] -     assertLen (my_list) >0 - My_list.pop () the     assertLen (my_list) >0 - exceptassertionerror as Reason: -     Print('Segmentation Errors'+str (reason)) -  +  - #Indexerror + #keyerror Dictionary Access # my_dict.get (' four ') A #IOError input/output operation error at #OSError Operating system error - #overflowerror operation exceeded limit - #SyntaxError # syntax - #TraceError - #zerodivisionerror except 0 - #TypeError Type Error in  - #Debug Try ... except ... finally raise to Try:#try to error first print, followed by instruction not +f = open ('I am a file. txt','R') -     PrintF.read () the f.close () * exceptIOError as Reason: $     Print('File Error'+str (reason))Panax Notoginseng finally:#Absolute Execution - f.close () the  + RaiseIOError ('File Error') A  the #Else + #If ... else ... Or... Or ... - #While...else ... Finish the job ... Do not finish ... $ #find greatest common divisor $ defshow_factor (num): -Count = num//2#except 2 -      whileCount > 1: the         ifNum% Count = =0: -             Print('%d The largest approximate number is%d'%(num, count))Wuyi              Break theCount-= 1 -     Else: Wu         Print('%d is the prime number!! '% num)#Execution is all done and executed. -  Aboutnum = Int (33) $ Print(Show_factor (num)) - #try...else ... - Try: -int'ABC') A exceptvalueerror as Reason: +     Print('something went wrong.'+str (reason)) the Else: -     Print('There is no error.') $  the # with the Try: theOpen'Data.txt','W') the      forEach_lineinchF: -         Print(Each_line) in exceptIOError: the     Print('something went wrong.') the finally: AboutF.close ()

Python Learning note Five: errors, debugging, and testing