Demonstrating exception arguments and stack unwinding. : Except : Statement PYTHON TUTORIALS


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Demonstrating exception arguments and stack unwinding.


import traceback

def function1():
   function2()

def function2():
   function3()

def function3():
   # raise exception, catch exception, reraise exception
   try:
      raise Exception, "An exception has occurred"
   except Exception:
      print "Caught exception in function3. Reraising....n"
      raise   # reraises most recent exception

# call function1, any Exception it generates will be
# caught by the except clause that follows
try:
   function1()

# output exception arguments, string representation of exception,
# and the traceback
except Exception, exception:
   print "Exception caught in main program."
   print "nException arguments:", exception.args
   print "nException message:", exception
   print "nTraceback:"
   traceback.print_exc()



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