Fix import errors

rest_framework/compat.py

@@ -431,5 +431,12 @@ except ImportError:
 # OAuth 2 support is optional
 try:
     import provider.oauth2 as oauth2_provider
+
+    # Hack to fix submodule import issues
+    submodules = ['backends', 'forms','managers','models','urls','views']
+    for s in submodules:
+        mod = __import__('provider.oauth2.%s.*' % s)
+        setattr(oauth2_provider, s, mod)
+
 except ImportError:
     oauth2_provider = None

rest_framework/runtests/settings.py

@@ -106,7 +106,7 @@ try:
         'provider',
         'provider.oauth2',
     )
-except ImportError, inst:
+except ImportError:
     import logging
     logging.warning("django-oauth2-provider is not install, some tests will be skipped")
 

rest_framework/tests/authentication.py

@@ -46,10 +46,14 @@ urlpatterns = patterns('',
     (r'^basic/$', MockView.as_view(authentication_classes=[BasicAuthentication])),
     (r'^token/$', MockView.as_view(authentication_classes=[TokenAuthentication])),
     (r'^auth-token/$', 'rest_framework.authtoken.views.obtain_auth_token'),
-    url(r'^oauth2/', include('provider.oauth2.urls', namespace = 'oauth2')),
-    url(r'^oauth2-test/$', MockView.as_view(authentication_classes=[OAuth2Authentication])),
 )
 
+if oauth2_provider is not None:
+    urlpatterns += patterns('', 
+        url(r'^oauth2/', include('provider.oauth2.urls', namespace = 'oauth2')),
+        url(r'^oauth2-test/$', MockView.as_view(authentication_classes=[OAuth2Authentication])),
+    )
+
 
 class BasicAuthTests(TestCase):
     """Basic authentication"""