[pyar] mini problema con argparse

[Juan BC]

On 24/05/11 02:33, Martín Gaitán wrote:
> 2011/5/24 Juan BC<jbc.develop en gmail.com>:
>> estoy migrando algunas cosas de optparse a argparse... y tengo siguiente
>> código
>>
>> #===============================================================
>> #coso.py
>> import argparse
>>
>> parser = argparse.ArgumentParser()
>> parser.add_argument("command",
>>                     action="store",
>>                     type=str,
>>                     metavar="<COMMAND>")
>> parser.add_argument("options",
>>                     action="store",
>>                     nargs='*',
>>                     type=str,
>>                     default=[],
>>                     metavar="<OPTION, [OPTION_2, ..., OPTION_N]>")
>>
>> parser.parse_args()
>> #===============================================================
>>
>> al ejecutarlo me tira la siguiente exception
>>
>> #===============================================================
>>   File "coso.py", line 15, in<module>
>>     parser.parse_args()
>>   File "/usr/lib/pymodules/python2.6/argparse.py", line 1698, in parse_args
>>     args, argv = self.parse_known_args(args, namespace)
>>   File "/usr/lib/pymodules/python2.6/argparse.py", line 1730, in
>> parse_known_args
>>     return self._parse_known_args(args, namespace)
>>   File "/usr/lib/pymodules/python2.6/argparse.py", line 1943, in
>> _parse_known_args
>>     self.error(_('too few arguments'))
>>   File "/usr/lib/pymodules/python2.6/argparse.py", line 2352, in error
>>     self.print_usage(_sys.stderr)
>>   File "/usr/lib/pymodules/python2.6/argparse.py", line 2314, in print_usage
>>     self._print_message(self.format_usage(), file)
>>   File "/usr/lib/pymodules/python2.6/argparse.py", line 2270, in format_usage
>>     return formatter.format_help()
>>   File "/usr/lib/pymodules/python2.6/argparse.py", line 314, in format_help
>>     help = self._root_section.format_help()
>>   File "/usr/lib/pymodules/python2.6/argparse.py", line 244, in format_help
>>     func(*args)
>>   File "/usr/lib/pymodules/python2.6/argparse.py", line 366, in _format_usage
>>     assert ' '.join(pos_parts) == pos_usage
>> AssertionError
>> #===============================================================
>>
>> LA verdad que muy no tengo bien idea por que sucede y me la pase leyendo la
>> documentación(seguro que se me paso algo por arriba)
>
>
> No tengo una respuesta puntual a tu pregunta, pero te recomiendo plac
> [1]  Documentación (y me saco el sombrero/gorrito de lana)  [2]
>
> [1] http://pypi.python.org/pypi/plac
> [2] http://micheles.googlecode.com/hg/plac/doc/plac.html

barbaro plac para futuras referencias, pero necesito hacer esto con 
argparse :(