numpy required for C++ library to work with python bindings

[palu3492]

I've added Boost python bindings into a C++ library. Calling the initialization method of this C++ library from python will fail if numpy is not imported into python before importing my C++ library. There are no errors but the C++ library spits out it failed to initialize. Why would numpy be required in python for my boost bindings to work with this C++ library? See example below.

C++

// Boost imports I'm using
#include <boost/python.hpp>
#include <boost/python/dict.hpp>
#include <boost/python/object.hpp>
using namespace boost;

static bool InitializePy() {
    // Call library initialize here
}

BOOST_PYTHON_MODULE(test_lib)
{
    python::def("initialize", InitializePy);
}

Python

# import numpy
import test_lib
# Without importing numpy, this initialization will fail
test_lib.initialize()

I can share more source if anyone would like a look but the way I see it, regardless of what else is being done in C++, numpy needing to be imported in python is odd to me.