The document discusses integrating Python and C++ by using Python where possible for its simplicity and readability, but using C++ for performance-critical parts where needed. It provides tips on a real-world example of hybrid Python/C++ development. The example quote is "Python where we can, C++ where we must" from Alex Martelli, a senior Google developer.

1. Python Extending/Integrating A Real World Example Tips Summary
Python where we can,
C++ where we must
Source:
http://xkcd.com/413/
Guy K. Kloss | Thinking Hybrid – Python/C++ Integration 1/33