GAE 1.5.5 looks to have awesome features. They're not working for me
yet. Below are some of the issues I'm having.

Here's roughly my app.yaml (which has been altered for privacy
reasons, as is example code below).

---- app.yaml ----
application: AAA # mystical creation.
version: alpha-1
runtime: python27
api_version: 1
threadsafe: true

handlers:
- url: /media
  static_dir: media/

- url: /favicon.ico
  static_files: media/images/favicon.ico
  upload: media/images/favicon.ico

- url: /crossdomain.xml
  static_files: media/crossdomain.xml
  upload: media/crossdomain.xml

- url: /admin
  script: AAA.app
  login: admin

- url: /.*
  script: AAA.app

skip_files:
- ^(.*/)?app\.yaml
- ^(.*/)?app\.yml
- ^(.*/)?index\.yaml
- ^(.*/)?index\.yml
- ^(.*/)?#.*#
- ^(.*/)?.*~
- ^(.*/)?.*\.py[co]
- ^(.*/)?.*/RCS/.*
- ^(.*/)?\..*
- ^(.*/)?.*\.bak$
- ^local.*$
- ^var.*$

libraries:
- name: django
  version: "1.2"
- name: jinja2
  version: latest
- name: yaml
  version: latest
---- End app.yaml ----

I'm on Mac OS X Lion (10.7.1).

I hypothesize that I am not actually using the Python 2.7 runtime, in
spite of the declaration in app.yaml to use it. I've not validated
this theory, but the errors I've encountered are consistent with it.


==========
Python Path
==========

When Google App Engine's Python Path is not set, the app engine runs
using Python 2.6.6.

To fix this I set Python Path to /usr/bin/python2.7 in the Google App
Engine preferences.


=====
WSGI
=====

I get the following error:

 /Applications/GoogleAppEngineLauncher.app/Contents/Resources/
GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/
google/appengine/tools/dev_appserver.py in
GetParentPackage(self=<google.appengine.tools.dev_appserver.HardenedModulesHook
object>, fullname='AAA.app')
   2334
   2335       if self.find_module(fullname) is None:
=> 2336         raise ImportError('Could not find module %s' %
fullname)
   2337
   2338       return self._module_dict[parent_module_fullname]
builtin ImportError = <type 'exceptions.ImportError'>, fullname =
'AAA.app'
<type 'exceptions.ImportError'>: Could not find module AAA.app
      args = ('Could not find module AAA.app',)
      message = 'Could not find module AAA.app'

Where I've tried AAA.app as:

AAA.py:
   from google.appengine.dist import use_library
  use_library('django', '1.2') # otherwise we still get django 0.96
  from AAA.initialize import Initializer
  Initializer.run() # do stuff to init (logs, etc.)
  from django.core.handlers import wsgi
  app = wsgi.WSGIHandler()

AAA/__init__.py
   # same content as above

AAA/AAA.py
   # same content as above

Note that I can continue to run CGI with app.yaml and AAA.py modified,
mutatis mutandis. However doing so results in the errors below:

=====
Jinja2
=====

When I run `import jinja2` I get an ImportError.


=======
Django2
=======

Without:
   from google.appengine.dist import use_library
   use_library('django', '1.2')

I end up with Django 0.96.

======
Theory
======

Given the following:
 -  http://code.google.com/appengine/docs/python/tools/libraries27.html
states "The use_library() function provided by the
google.appengine.dist package is unavailable in Python 2.7."
- use_library works for me
- use_library is required because the "libraries: {django: {...,
version: "1.2"}} declaration does not set the django version to 1.2
- Only Django 1.2 is included in the Python 2.7 runtime (per the
libraries27.html link above)
- I have to manually specify Python 2.7 in the Python Path in order
for GAE to use Python 2.7
- WSGI doesn't load the application properly
- Jinja2 cannot be imported
I believe I am not really using the Python 2.7 GAE runtime (i.e. the
app.yaml declaration is being ignored).

I hope the above is helpful, and I am available to contact directly
for any further information.

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