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Learn Python From 'Head First Python' [3] : Exception

1.the using of exception

2.file opration

import os>>> try:    data = open(sketch.txt)    for each in data:        try:            (role,message) = each.split(:)            print(role +  says:  + message, end=‘‘)        except ValueError:            pass    data.close()except IOError:    print(file is missing)

you can get the sketch.txt from the python offical webstatie

Learn Python From 'Head First Python' [3] : Exception