Am Sa Mai 31 2014, 13:08:12 schrieb Ganesh Pal:
>> I think you have to do it manually:
>>
>> options, args = parser.parse_args()
>>
>> if options.object == "super_block" and options.path is not None:
>> parser.error("Paths not allowed for 'super_block' object")
>>
>> elif options.object == "files" and options.path is None:
>> parser.error("'files' object requires a path")
>>
>> --
>> https://mail.python.org/mailman/listinfo/python-list
>
> Thanks Peter , above will work for case 2.
>
> How about case 1. i.e .
>
> The --path is optional for few for the object type.
>
> #python corrupt.py --object=super_block --size=1000
>
> ==> Should work even if --path is not given and should not complain
> if --path is missing
My code example is meant to convey the basic idea; you have to adapt it to
your needs. E. g.
if options.object == "super_block":
if not path_is_acceptable_for_super_block(options.path):
parser.error(
"{!r} not an acceptable path for super_block object"
.format(options.path))
elif options.object == "files" and options.path is None:
parser.error("'files' object requires a path")
where you are to write the path_is_acceptable_for_super_block() function to
comply with your requirements.
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