At section 15.4.2.11. add_help ( http://docs.python.org/2/library/argparse.html#add-help ) there is an error on the last piece of code. Where it is written:

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parser = argparse.ArgumentParser(prog='PROG', prefix_chars='+/')

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parser.print_help()

usage: PROG [-h] optional arguments: -h, --help show this help message and exit Should be:

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parser = argparse.ArgumentParser(prog='PROG', prefix_chars='+/')

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parser.print_help()

usage: PROG [-h] optional arguments: +h, ++help show this help message and exit As it is described in the previous paragraph. The second way works for me for Python 2.7.2 on Windows 7 64 bits. Regars, Agus Terol