Example: using an extractor class in Boost.Python
The documentation for the Boost.Python extractor class is not terribly enlightening for a new user. The examples given in the tutorial are code fragments, and it’s never clear exactly what the context is or what they are supposed to accomplish. That’s a shame, because the extractor classes are really cool and easy to use, so people should use them! Here is a Boost Python extractor example that should make things clear.