Don't try to import the parent of a namespace package in declare_namespace -- fixes #204

--HG--
branch : distribute
extra : rebase_source : 1644e937b2d0b2fae58e27740d0fddfe082586cd

1 files changed, 6 insertions, 5 deletions

diff --git a/pkg_resources.py b/pkg_resources.py
index 30dbc188..5eb19df3 100644
--- a/pkg_resources.py
+++ b/pkg_resources.py
@@ -1773,11 +1773,12 @@ def declare_namespace(packageName):
         if '.' in packageName:
             parent = '.'.join(packageName.split('.')[:-1])
             declare_namespace(parent)
-            __import__(parent)
-            try:
-                path = sys.modules[parent].__path__
-            except AttributeError:
-                raise TypeError("Not a package:", parent)
+            if parent not in _namespace_packages:
+                __import__(parent)
+                try:
+                    path = sys.modules[parent].__path__
+                except AttributeError:
+                    raise TypeError("Not a package:", parent)
 
         # Track what packages are namespaces, so when new path items are added,
         # they can be updated