Hi, I am having some issues using boost-python on OS X using Anaconda Python 3.5. I am able to build a simple c++ function using boost-python and call it from Python. However, when I create a simple class and call the constructor, I am met with: In [2]: hello_ext.World() --------------------------------------------------------------------------- TypeError Traceback (most recent call last) <ipython-input-2-514fe5345d15> in <module>() ----> 1 hello_ext.World() TypeError: __init__() should return None, not ‘NoneType' From what I understand, this means that I have linked boost-python. against an incompatible version of Python. I thought I had build boost-python correctly (I have built directly using bjam and have tried binaries from Anaconda). However, when I try to see what Python libraries are linked against boost-python, I don’t see any reference to any Python libraries: boost_python_test Jon$ otool -L /Users/Jon/anaconda/envs/my-env/lib/libboost_python3.dylib /Users/Jon/anaconda/envs/my-env/lib/libboost_python3.dylib: @rpath/./libboost_python3.dylib (compatibility version 0.0.0, current version 0.0.0) /usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current version 52.0.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 159.1.0) Shouldn’t a call to otool show me which Python library was linked to boost-python? And, if none is reported what does that mean? Any help with the above issues would be greatly appreciated. Thanks. -Jon