On Wed, 07 Apr 2010 20:14:23 -0700, Raymond Hettinger wrote: > [Raymond Hettinger] >> > If the two collections have unequal sizes, then both ways immediately >> > return unequal. > > [Steven D'Aprano] >> Perhaps I'm misinterpreting what you are saying, but I can't confirm >> that behaviour, at least not for subclasses of list: > > For doubters, see list_richcompare() in > http://svn.python.org/view/python/trunk/Objects/listobject.c? revision=78522&view=markup
So what happens in my example with a subclass that (falsely) reports a different length even when the lists are the same? I can guess that perhaps Py_SIZE does not call the subclass __len__ method, and therefore is not fooled by it lying. Is that the case? -- Steven -- http://mail.python.org/mailman/listinfo/python-list