Chris Angelico <ros...@gmail.com>: > numerical calculations might overflow to +inf or -inf, and then > further calculations can result in a nan, etc, etc. Those are the > sorts of examples that you'd find among SciPy users and such.
There is some inconsistency. Mathematically, there are undefined operations, for a good reason. That's because the limits are not unambiguous and that's why 0/0, 0**0, 1/0 and inf-inf are undefined. Why 0/0 results in an exception but inf-inf = nan, I don't see a justification. Marko -- https://mail.python.org/mailman/listinfo/python-list
