logilab-common #6675 default values for store_* are not honored [open]

configuration module stores by default the complementary value at the startup but the python documentation says that we can do that indifferently : http://docs.python.org/library/optparse.html#default-values

In specification this is equivalent:

parser.add_option("-v", action="store_true", dest="verbose")
parser.add_option("-q", action="store_false", dest="verbose", default=True)

and

parser.add_option("-v", action="store_true", dest="verbose", default=True)
parser.add_option("-q", action="store_false", dest="verbose")

But with configuration.py:

self.options = (
       ('quiet',
        {'action': 'store_false',
         'dest' : "verbose",
        }),
       ('verbose',
        {'action': 'store_true',
         'dest' : "verbose",
         'default': True,
        }),
       )

The default True value will not be honored because overwritten by the verbose option.