On 2012-06-18, at 9:50 PM, Steven D'Aprano wrote: > On Mon, Jun 18, 2012 at 07:10:33PM -0400, Yury Selivanov wrote: > >> It seems that we have the following options for 'signature(obj)': >> >> 1. If 'obj' has a '__signature__' attribute - return a copy of it, >> if not - create a new one. >> >> 2. If 'obj' has a '__signature__' attribute - return it, >> if not - create a new one. >> >> 3. Same as '2', but Signature is also immutable. > > There's a slight ambiguity there. Do you mean, create a __signature__ > attribute, or just create a new Signature instance? > > I presume you mean the later, a Signature instance, and not cache it in > __signature__.
Right. No implicit caching to __signature__ by the signature() function. So, more verbose: 1. If 'obj' has a '__signature__' attribute - return a copy of its value, if not - create a new Signature and return it. 2. If 'obj' has a '__signature__' attribute - return a copy of its value, if not - create a new Signature and return it. 3. Same as '2', but Signature is also immutable. Thanks! - Yury _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
