This is somewhere that I would personally use a metaclass. That way,
if you define more subclasses of Message, you're not limited to doing
so in that single module.
Someone correct me if this is goofy, I don't do much metaclass programming.
Perhaps something like:
#!/usr/bin/python
class MetaMessage(type):
nmap = {}
def __new__(mcl, name, bases, d):
obj = super(MetaMessage, mcl).__new__(mcl, name, bases, d)
# Check __name__ here as 'Message' isn't yet defined.
if "Message" in [b.__name__ for b in bases]:
if "number" not in d:
raise TypeError("Message protocol expects a number attribute")
MetaMessage.nmap[d['number']] = obj
# Complete Creation.
return obj
class Message(object):
__metaclass__ = MetaMessage
class MessageOne(Message):
number = 1
class MessageTwo(Message):
number = 2
class MessageFourThousandThreeHundredAndTwentyTwoPointOne(Message):
number = 4322.1
print MetaMessage.nmap
Which results in:
mac:~ jeff$ !p
python test.py
{1: <class '__main__.MessageOne'>, 2: <class '__main__.MessageTwo'>,
4322.1000000000004: <class
'__main__.MessageFourThousandThreeHundredAndTwentyTwoPointOne'>}
mac:~ jeff$
Thanks!
Jeff
On 3/19/08, benhoyt <[EMAIL PROTECTED]> wrote:
>
> Replying to myself here, after discovering more. :-)
>
>
> > Is there a way to get __thismodule__ in Python?
>
>
> It looks like __thismodule__ is just sys.modules[__name__]. Neat.
>
> Hmmm ... does sys.modules always already contain the currently-being-
> loaded module? Or is this a hack that only happens to work? (It does;
> I've tested it now.) Just wondering, because the Python docs say that
> sys.modules is "a dictionary that maps module names to modules which
> have *already been loaded*."
>
>
> > if isinstance(attr, Message):
> > nmap[attr.number] = attr
>
>
> Oops, this was untested code. I actually meant issubclass (or
> something similar) here, not isinstance.
>
>
> Cheers,
> Ben.
> --
> http://mail.python.org/mailman/listinfo/python-list
>
--
http://mail.python.org/mailman/listinfo/python-list
