Useful, practical notes and code snippets from the python-dev mailing list
After an 8-hour bug hunt, Tim Peters [http://mail.python.org/pipermail/python-dev/2003-April/034557.html|noted this bit of wisdom]
""" Word to the wise: don't ever try to reuse a variable whose address is passed to PyArg_ParseTuple for anything other than holding what PyArg_ParseTuple does or doesn't store into it. You'll never get the decrefs straight (and even if you manage to at first, the next person to modify your code will break it). """
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