dreamhost python3 Django passenger setup import Cookie - django

Question

I am trying to setup django with python3 on dreamhost.
I have setup a virtualenv as documented by them and installed all the pre-requisites. I have gotten runserver working
The problem comes with passenger setup. The error log shows that I am unable to import a module named Cookie, resulting out of further errors.
This is the traceback:
File "/home/user/path/env/lib/python3.4/imp.py", line 171, in load_source
module = methods.load()
File "<frozen importlib._bootstrap>", line 1220, in load
File "<frozen importlib._bootstrap>", line 1200, in _load_unlocked
File "<frozen importlib._bootstrap>", line 1129, in _exec
File "<frozen importlib._bootstrap>", line 1471, in exec_module
File "<frozen importlib._bootstrap>", line 321, in _call_with_frames_removed
File "passenger_wsgi.py", line 17, in <module>
from django.core.wsgi import get_wsgi_application
File "/home/user/path/env/lib/python3.4/site-packages/django/core/wsgi.py", line 2, in <module>
from django.core.handlers.wsgi import WSGIHandler
File "/home/user/path/env/lib/python3.4/site-packages/django/core/handlers/wsgi.py", line 11, in <module>
from django import http
File "/home/user/path/env/lib/python3.4/site-packages/django/http/__init__.py", line 1, in <module>
from django.http.cookie import SimpleCookie, parse_cookie
File "/home/user/path/env/lib/python3.4/site-packages/django/http/cookie.py", line 5, in <module>
from django.utils.six.moves import http_cookies
File "/home/user/path/env/lib/python3.4/site-packages/django/utils/six.py", line 90, in __get__
result = self._resolve()
File "/home/user/path/env/lib/python3.4/site-packages/django/utils/six.py", line 113, in _resolve
return _import_module(self.mod)
File "/home/user/path/env/lib/python3.4/site-packages/django/utils/six.py", line 80, in _import_module
__import__(name)
File "/home/user/path/env/lib/python3.4/site-packages/django/http/__init__.py", line 1, in <module>
from django.http.cookie import SimpleCookie, parse_cookie
ImportError: cannot import name 'SimpleCookie'
as you can see the line,
from django.core.wsgi import get_wsgi_application
is failing
on the other hand, when i try it with the python interpreter, it imports correctly.
I have also verified that the same interpreter is being used by passenger by logging the variable
import sys
raise Exception(sys.executable)
Any ideas as to the cause of this?
I tried logging path, it displays the following
['/home/user/path/env/lib/python3.4/site-packages', '/home/user/path/env/lib/python3.4/site-packages/django', '/home/user/path/env/bin', '/home/user/path', '/usr/local/dh/passenger/helper-scripts', '/home/user/path/env/lib/python34.zip', '/home/user/path/env/lib/python3.4', '/home/user/path/env/lib/python3.4/plat-linux', '/home/user/path/env/lib/python3.4/lib-dynload', '/home/user/opt/python-3.4.2/lib/python3.4', '/home/user/opt/python-3.4.2/lib/python3.4/plat-linux', '/home/user/path/env/lib/python3.4/site-packages', '/home/user/path', '/home/user/path/git/package']
which seems fine to me

Answer 1

The instructions in dreamhost wiki works fine. You just need to remove the extra django path in your wsgi config file. It should look like this:
...
cwd = os.getcwd()
sys.path.append(cwd)
sys.path.append(cwd + '/projectname') #You must add your project here
sys.path.insert(0,cwd+'/env/bin')
sys.path.insert(0,cwd+'/env/lib/python2.7/site-packages')
...
not like this:
...
cwd = os.getcwd()
sys.path.append(cwd)
sys.path.append(cwd + '/projectname') #You must add your project here
sys.path.insert(0,cwd+'/env/lib/python2.7/site-packages/django')
sys.path.insert(0,cwd+'/env/bin')
sys.path.insert(0,cwd+'/env/lib/python2.7/site-packages')
...

Answer 2

I ran into a same problem and the following solution works for me.
I have Django 1.7 with Python 3.4, using Eclipse with PyDev as my IDE.
My solution is related to this thread: Import Python module fails (http.cookies)
What I did:
In Eclipse, go to tab Project/Properties
Select side-tab PyDev - PYTHONPATH
Select External Libraries
There should be a path which looks like /.../lib/pythonX.Y/site-packages/django. Remove it.
(I was using the venv package to create my virtual environment. Your path may differ.)
Run the project and see if it works.
Comment: I think this is indeed a very weird problem... Something to do with the PyDev - DjangoProject setup with Python3, possibly. Let me know if this helps.