On Wed, Oct 14, 2009 at 4:42 PM, Neil Schemenauer <nas@arctrix.com> wrote:
Yes, it does still resort to setting globals to None. However, the
weakref step makes it much more likely that __del__ methods run
before that happens. After this change, referencing global variables
from __del__ methods is okay.

The first and last sentences seem like a contradiction to me.  If I cannot guarantee that globals will be valid when __del__ is executed, then I must not reference globals from __del__.

I think I'm missing something here.  Is there some way the programmer can determine that referencing a global variable in __del__ will be 100% safe? (not just "likely")
Daniel Stutzbach, Ph.D.
President, Stutzbach Enterprises, LLC