Ben Finney wrote:
> Steven Bethard <[EMAIL PROTECTED]> writes:
>
>> In most cases, argparse (http://argparse.python-hosting.com/)
>> supports negative numbers right out of the box, with no need to use
>> '--':
>>
>> >>> import argparse
>> >>> parser = argparse.ArgumentParser()
>> >>> parser.add_argument('-a', type=int)
>> >>> parser.add_argument('b', type=int)
>> >>> args = parser.parse_args('-a -42 -123'.split())
>> >>> args.a
>> -42
>> >>> args.b
>> -123
>
> That would be irritating. I've used many programs which have numbers
> for their options because it makes the most sense, e.g. 'mpage' to
> indicate number of virtual pages on one page, or any number of
> networking commands that use '-4' and '-6' to specify IPv4 or IPv6.
Did you try it and find it didn't work as you expected? Numeric options
seem to work okay for me::
>>> import argparse
>>> parser = argparse.ArgumentParser()
>>> parser.add_argument('-1', dest='one', action='store_true')
>>> args = parser.parse_args(['-1'])
>>> args.one
True
Argparse knows what your option flags look like, so if you specify one,
it knows it's an option. Argparse will only interpret it as a negative
number if you specify a negative number that doesn't match a known option.
STeVe
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