[Python-Dev] stack check on Unix: any suggestions? (original) (raw)

Vladimir Marangozov Vladimir.Marangozov@inrialpes.fr
Thu, 31 Aug 2000 17:32:29 +0200 (CEST)

Guido van Rossum wrote:

Please try this again on various platforms with this version: i = 0 class C: def getattr(self, name): global i print i i += 1 return self.name # common beginners' mistake C() # This tries to get init, triggering the recursion

        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Are you sure?

Although strange, this is not the case and instantiating C succeeds (try "python rec.py", where rec.py is the above code).

A closer look at the code shows that Instance_New goes on calling getattr2 which calls class_lookup, which returns NULL, etc, etc, but the presence of getattr is not checked in this path.

-- Vladimir MARANGOZOV | Vladimir.Marangozov@inrialpes.fr http://sirac.inrialpes.fr/~marangoz | tel:(+33-4)76615277 fax:76615252