Three common methods of the try except handler exception in Python

 If you encounter an exception when you write a Python program and want to do the following, you usually use try to handle the exception, assuming the following program: Try: Statement 1 Statement 2 ...

If you encounter an exception when you write a Python program and want to do the following, you usually use try to handle the exception, assuming the following program:

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try :      statement 1      statement 2                 statement n except   ...:      do something ...

But you don't know what kind of exception "statement 1 to Statement n" is going to do, but you have to do exception handling, and you want to print out the exception and not stop the program, so how do you write the phrase "except ..."?

A summary of the 3 methods :

Method One: Catch all exceptions

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try :  &NBSP,      a Code class= "python keyword" >= b        b = c   except   exception,e:        print  exception, ,e

Method Two: Use the Traceback module to view exceptions

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#引入python中的traceback模块, tracking error import  traceback   try :         a = b        b = c   except :        traceback.print_exc ()

Method Three: Using the SYS module to backtrack the last anomaly

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#引入sys模块importsys  try:      a=b      b=c  except:      info=sys.exc_info()      printinfo[0],":",info[1]

However, if you want to save these exceptions to a log file to analyze these exceptions, consider the following:

Save the information printed on the screen to a text file by Traceback.print_exc ()

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import tracebacktry:      a=b      b=c  except:      f=open("c:log.txt",‘a‘)      traceback.print_exc(file=f)      f.flush()      f.close()

Three common methods of the try except handler exception in Python