It doesn't work that way for new-style classes. On 9/28/05, Barry Warsaw <[EMAIL PROTECTED]> wrote: > On Wed, 2005-09-28 at 10:16, Jim Fulton wrote: > > > When we ask for the eggs attribute the first time, we call the > > descriptor, which calls the eggs function. The function sets the eggs > > attribute, overriding the descriptor. The next time the eggs attribute > > is accessed, the saved value will be used without calling the > > descriptor. > > > > I do this often enough that I think it would be useful to include it > > in python, either as a builtin (like property) or in the library. (Or > > possibly by adding an option to property to generate a read > > descriptor.) I'd be happy to add this for 2.5. > > I /must/ be missing something. Why not just use property as a > decorator? > > class C: > @property > def eggs(self): > print 'in eggs' > self.eggs = 7 > return self.eggs > > >>> c = C() > >>> c.eggs > in eggs > 7 > >>> c.eggs > 7 > > -Barry > > > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.1 (GNU/Linux) > > iQCVAwUAQzsX03EjvBPtnXfVAQK43QP/dRjW11myDXRdjXcPPuaxRQ2qtUlMyAJG > 26sedhmrF00rvKVh7U0RaGJ/Cq5iwgEbQRmXm1pbS8UKzNZxz55qGjVDXjp7Rwgr > KJpJzz/UWVqVClRJJGDdgasRO8GUfxTYh2YPrmXaTDPLh3uscIwpwq1oapT1R4OH > 6xJYLrjAs9M= > =mCyw > -----END PGP SIGNATURE----- > > > _______________________________________________ > 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/guido%40python.org > > >
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