cd Boost-Python-Examples/Examples/derived_object_types
make
python3 example.py

Python 3.5.2 (default, Aug 18 2017, 17:48:00)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from derived_object_types import *
>>> t = test()
>>> print(t.to_list(1, "ss"))
[1, 'ss']
>>> print(t.to_tuple())
(123, 'D', 'Hello, World', 0.0)
>>> print(t.to_str("hello!"))
HELLO! is bigger than hello!