The python-daemon package ( PyPI listing , Pagure repo ) is very useful. However, I feel it has suffered a bit from sparse documentation, an...
Free book: Natural Language Processing with Python
Here's a free online book (with supplementary material): Natural Language Processing with Python, by Bird, Klein, and Loper. It's based on the Natural Language Toolkit (NLTK), a Python library. You can fork it and the book at GitHub.