Question

I’ve just come to Python from PHP after inheriting a legacy google app engine app. I’ve tried migrating to python 2.7 following various online tutorials, but I’m way out of my depth with the error below. Is it something to do with how I’m calling the GAE or Django api?

...
runtime: python27
api_version: 1
threadsafe: yes

builtins:
- remote_api: on

inbound_services:
- warmup


libraries:
- name: django
  version: "1.2"  
...

I still have

from google.appengine.ext.webapp.util import run_wsgi_app

In my code, should this be changed to a builin?

ERROR    2012-02-28 16:31:00,167 wsgi.py:205] 
Traceback (most recent call last):
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-        default.bundle/Contents/Resources/google_appengine/google/appengine/runtime/wsgi.py", line     193, in Handle
    result = handler(self._environ, self._StartResponse)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/django_1_2/django/core/handlers/wsgi.py", line 248, in __call__
    response = self.get_response(request)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/django_1_2/django/core/handlers/base.py", line 141, in get_response
    return self.handle_uncaught_exception(request, resolver, sys.exc_info())
UnboundLocalError: local variable 'resolver' referenced before assignment
INFO     2012-02-28 16:31:00,178 dev_appserver.py:2884] "GET /ibi/index.html HTTP/1.1" 500 -

Answer 1

Don’t use run_wsgi_app in Python 2.7 runtime. In your app.yaml you have to refer to the actual WSGI application object.

See documentation here on how to properly configure Django