<filename>Python/Tests/GlassTests/PythonTests/Python/StepNativeToPython/py_mod.py
import cpp_mod

def callback():
    print('ok')

cpp_mod.global_func(callback)

<filename>Python/Tests/GlassTests/PythonTests/Python/StepNativeToPython/py_mod.py
import cpp_mod

def callback():
    print('ok')

cpp_mod.global_func(callback)
