2007/8/2, Paul Moore <p.f.moore@gmail.com>:

A wild guess: c < None falls back to checking c.__cmp__(None) < 0. This translates to NotImplemented < 0, and as the ordering of built in types is implementation dependent, maybe that explains the difference between Windows and Linux?

"NotImplemented < 0" returns False, which is ok, but different from "c < None" 2007/8/2, Guido van Rossum <guido@python.org>:

...

But how do you explain the difference in behaviour between Linux and Windows?

Perhaps the comparison compares the objects' address.

No, because NotImplemented and None are always the same: if this is the problem Linux and Windows could be different but they would be consistent with themselves (and Windows is not coherent with itself). Bottom line: I can easily fix Decimal to handle this special case, the point is that maybe we have a lower level bug here... Regards, -- . Facundo Blog: http://www.taniquetil.com.ar/plog/ PyAr: http://www.python.org/ar/