[webexcess]

Thank you, I hadn't seen that. I've added that link to the bottom of my article.

[beagle3]

You use "assert gen.next() is None", but asserts might be dropped by optimizations, see e.g. http://docs.python.org/release/2.5.2/ref/assert.html - and your code will break.

assert should only be used for debugging, and only for things that should never happen. side effects on assert is a no-no. (Also in C)