Execution error in 02-ExposingClasses example #17

Hello,

Thank you for making public this repository

I have an issue with the following example "02-ExposingClasses". After a successful compilation when I executing the classes.py I have the following error:

Traceback (most recent call last):
  File "classes.py", line 5, in <module>
    t = classes.World()
TypeError: __init__() should return None, not 'NoneType'

I am using:

• osx 10.13
• python 3.6 anaconda
• boost 1.65.1

in the build.sh I configured the following variables

• PYTHON_VERSION="3.6m"
• PYTHON_LIBRARY=/usr/local/anaconda/lib/libpython$PYTHON_VERSION.dylib
• PYTHON_INCLUDE_DIR=/usr/local/anaconda/include/python$PYTHON_VERSION
• BOOST_ROOT=/usr/local/anaconda

I checked that the classes.so was linked correctly

> otool -L classes.so
classes.so:
	@rpath/libboost_python3.dylib (compatibility version 0.0.0, current version 0.0.0)
	@rpath/libpython3.6m.dylib (compatibility version 3.6.0, current version 3.6.0)
	/usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 400.9.0)

Thank

Best regards,
Vincent