pkg_resources is replaces with pkgutil

bob/__init__.py

-#see http://peak.telecommunity.com/DevCenter/setuptools#namespace-packages
-__import__('pkg_resources').declare_namespace(__name__)
+# see https://docs.python.org/3/library/pkgutil.html
+from pkgutil import extend_path
+__path__ = extend_path(__path__, __name__)

bob/learn/__init__.py

-#see http://peak.telecommunity.com/DevCenter/setuptools#namespace-packages
-__import__('pkg_resources').declare_namespace(__name__)
+# see https://docs.python.org/3/library/pkgutil.html
+from pkgutil import extend_path
+__path__ = extend_path(__path__, __name__)

setup.py

@@ -66,10 +66,7 @@ setup(
     install_requires = build_requires,
 
     # Declare that the package is in the namespace bob.learn
-    namespace_packages = [
-      'bob',
-      'bob.learn'
-    ],
+
 
     ext_modules = [
       Extension("bob.learn.boosting.version",