I have a package named A, with a subpackage B, and I want to create a
namespace package A.B.C.
In the namespace package setup file I set
and I use declare_namespace in both A/__init__.py and A/B/__init__.py
However if I:
1) install A package
2) install A.B.C package
importing A.B.C will raise an ImportError exception.
If I reinstall A package, then it seems to work.
Where is the problem?