cd Boost-Python-Examples/Examples/class_member
make
python3

Python 3.5.2 (default, Nov 17 2016, 17:05:23)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import class_member
>>> var = class_member.Var("I am Var")
>>> var.name
'I am Var'
>>> var.value
0.0
>>> var.value = 3
>>> var.value
3.0
>>> var.name = "!"
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: can't set attribute