This is an attempt to create a minimal reproducer for an issue I encountered testing peakingduck in the TravisCI Windows environment. Python encounters trouble when trying to load an extension library written in C++ and compiled with PyBind. At first I thought it couldn't find the file, but now I think there may be a dependency DLL which can not be found. See this discussion on the problem.
cmacmackin/travis-windows-pybind
Minimal reproducer for link-errors when running PyBind modules on Windows with Travis CI
CMake