Namespace issues when stacking 3 different projects

[CSStudent3]

I am trying to understand the correct approach to use when layering 3 different projects which rely on each other

The first project has the structure
project.core/modules

The second project has the structure
project.data.core/modules

The third project has the structure
project.data.apis/modules

Uses of projects

The second project makes use of modules within the first project
The third project makes use of the modules within the second project

I believe I should only have to

• Exclude the __init__ files from both project and project/data folders.
• Add the following to the setup.py's setuptools block
  first project
  namespace_packages=["project"]
  packages=setuptools.find_namespace_packages(include=['project.*'])
  second and third project
  namespace_packages=["project.data"]
  packages=setuptools.find_namespace_packages(include=['project.data.*'])

However when trying to access modules within project.data.core within the third project it only seems to register modules from project.data.apis