Expressiveness in Python

I've been having fun reworking the Literate Programming tool nuweb in Python; the Mercurial repository for the rework can be browsed here. On the way I've come across a neat hack, and a rather unlikely workaround for Python's lack of a switch statement.

Debugging and stack traces on Mac OS X Lion

Mac OS X 10.7 Lion (really, Xcode 4) has changed the way that the system linker works in a way which makes debugging and interpreting stack traces difficult-to-impossible without special action.

Debugging with Mac OS X shared libraries

Writing Ada means you don't need the debugger that often. But when you do need it, you really need it. And often the reason will be an exception, which you'll want to catch and investigate.