Catch KeyError and AssertionError : except « Statement « Python Tutorial

import sys, string

matrix = {"brazil":"br","france":"fr","argentina":"ar","usa":"us"}

def getcode(country):
     try:
         data = matrix[string.lower(country)]
         assert data != "br", "You cannot select this country for this action!"
         return data
     except KeyError:
   print sys.exc_type, ":", "%s is not in the list." % sys.exc_value
         print
     except AssertionError, b:
         print b
         print

while 1:
    country = raw_input("Enter the country name or press x to exit: ")
    if country == "x":
        break
    code = getcode(country)
    if code != None: 
        print "%s's country code is %s" % (country, code)
        print

3.10.except
	3.10.1.	Catching Two Exceptions
	3.10.2.	Simple exception handling example.
	3.10.3.	Demonstrating exception arguments and stack unwinding.
	3.10.4.	Catch more than on exceptions
	3.10.5.	Catch KeyError and AssertionError
	3.10.6.	try/except block that checks for correct user input
	3.10.7.	try/except block with string argument