Example of using else clause after try ... except clauses in python. Reference: https://docs.python.org/2/tutorial/errors.html#handling-exceptions

try_except_else_example.py

for arg in sys.argv[1:]:
    try:
        f = open(arg, 'r')
    except IOError:
        print 'cannot open', arg
    else:
        print arg, 'has', len(f.readlines()), 'lines'
        f.close()