Namespace package problem

[kalxas]

/usr/local/ckan/default/pyenv/src/ckanext-interlinking> python setup.py develop
running develop
running egg_info
creating ckanext_interlinking.egg-info
writing ckanext_interlinking.egg-info/PKG-INFO
writing namespace_packages to ckanext_interlinking.egg-info/namespace_packages.txt
writing top-level names to ckanext_interlinking.egg-info/top_level.txt
writing dependency_links to ckanext_interlinking.egg-info/dependency_links.txt
writing entry points to ckanext_interlinking.egg-info/entry_points.txt
writing manifest file 'ckanext_interlinking.egg-info/SOURCES.txt'
error: Namespace package problem: ckanext is a namespace package, but its
init.py does not call declare_namespace()! Please fix it.
(See the setuptools manual under "Namespace Packages" for details.)

[drmalex07]

This __init__.py (https://github.com/PublicaMundi/ckanext-interlinking/blob/master/ckanext/__init__.py)
shouldnt be empty, it should declare the namespace, exactly as in https://github.com/PublicaMundi/ckanext-publicamundi/blob/master/ckanext/__init__.py.

This is not optional, because if you dont, it results to a name conflict.