Guido van Rossum wrote: >> Much to my surprise, this already works: >> >> >>> format(oldstyle(), '+^50s') >> '+++++<__main__.oldstyle instance at 0x3d91f8>+++++' >> >>> >> >> So I guess it's a moot point. I'm using the same code as I use in 3.0, >> where I call: >> meth = _PyType_Lookup(Py_TYPE(value), format_str); >> where format_str is "__format__" interned. And I'm getting a value back >> for old style classes. >> >> Eric. > > But now try overriding __format__(). The 3.0 code uses > _PyType_Lookup() which is not traversing the class dicts for classic > classes, so it won't find __format__ overrides. >
Okay, I see and understand that issue. But looking at len or getattr, I don't see how to generalize it to __format__. __len__ and __getattr__ have special support in the classes, with cl_getattr, tp_getattr, etc. I hate to be dense, but could you point me to some code that does something similar but looks up the method by name? Thanks for your time. Eric. _______________________________________________ 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
