Django WSGI deployment. No module named '_sqlite3' - django

Question

I try to deploy Django application under Django 1.8 and Apache mod_wsgi (python 3.4.3, ubuntu 14.04)
I have solved the previous error with import ( Django WSGI deployment. cannot import name 'SimpleCookie' ) but then I meet another one:
Error loading either pysqlite2 or sqlite3 modules (tried in that order): No module named '_sqlite3'
Here bigger piece of the error log:
[Wed Jun 10 18:33:44.021939 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "<frozen importlib._bootstrap>", line 1448, in exec_module
[Wed Jun 10 18:33:44.021960 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "<frozen importlib._bootstrap>", line 321, in _call_with_frames_removed
[Wed Jun 10 18:33:44.022198 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "/var/www/.virtualenvs/cp/lib/python3.4/site-packages/django/contrib/auth/models.py", line 41, in <module>
[Wed Jun 10 18:33:44.022207 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] class Permission(models.Model):
[Wed Jun 10 18:33:44.022760 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "/var/www/.virtualenvs/cp/lib/python3.4/site-packages/django/db/models/base.py", line 139, in __new__
[Wed Jun 10 18:33:44.022770 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] new_class.add_to_class('_meta', Options(meta, **kwargs))
[Wed Jun 10 18:33:44.022807 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "/var/www/.virtualenvs/cp/lib/python3.4/site-packages/django/db/models/base.py", line 324, in add_to_class
[Wed Jun 10 18:33:44.022814 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] value.contribute_to_class(cls, name)
[Wed Jun 10 18:33:44.023151 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "/var/www/.virtualenvs/cp/lib/python3.4/site-packages/django/db/models/options.py", line 250, in contribute_to_class
[Wed Jun 10 18:33:44.023161 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
[Wed Jun 10 18:33:44.023296 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "/var/www/.virtualenvs/cp/lib/python3.4/site-packages/django/db/__init__.py", line 36, in __getattr__
[Wed Jun 10 18:33:44.023304 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] return getattr(connections[DEFAULT_DB_ALIAS], item)
[Wed Jun 10 18:33:44.023514 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "/var/www/.virtualenvs/cp/lib/python3.4/site-packages/django/db/utils.py", line 240, in __getitem__
[Wed Jun 10 18:33:44.023558 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] backend = load_backend(db['ENGINE'])
[Wed Jun 10 18:33:44.023603 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "/var/www/.virtualenvs/cp/lib/python3.4/site-packages/django/db/utils.py", line 111, in load_backend
[Wed Jun 10 18:33:44.023610 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] return import_module('%s.base' % backend_name)
[Wed Jun 10 18:33:44.023642 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "/usr/local/lib/python3.4/importlib/__init__.py", line 109, in import_module
[Wed Jun 10 18:33:44.023649 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] return _bootstrap._gcd_import(name[level:], package, level)
[Wed Jun 10 18:33:44.023669 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "<frozen importlib._bootstrap>", line 2231, in _gcd_import
[Wed Jun 10 18:33:44.023690 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "<frozen importlib._bootstrap>", line 2214, in _find_and_load
[Wed Jun 10 18:33:44.023711 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "<frozen importlib._bootstrap>", line 2203, in _find_and_load_unlocked
[Wed Jun 10 18:33:44.023732 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "<frozen importlib._bootstrap>", line 1200, in _load_unlocked
[Wed Jun 10 18:33:44.023752 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "<frozen importlib._bootstrap>", line 1129, in _exec
[Wed Jun 10 18:33:44.023773 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "<frozen importlib._bootstrap>", line 1448, in exec_module
[Wed Jun 10 18:33:44.023793 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "<frozen importlib._bootstrap>", line 321, in _call_with_frames_removed
[Wed Jun 10 18:33:44.023826 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] File "/var/www/.virtualenvs/cp/lib/python3.4/site-packages/django/db/backends/sqlite3/base.py", line 36, in <module>
[Wed Jun 10 18:33:44.023833 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] raise ImproperlyConfigured("Error loading either pysqlite2 or sqlite3 modules (tried in that order): %s" % exc)
[Wed Jun 10 18:33:44.023862 2015] [:error] [pid 19282:tid 140071189554944] [client 192.168.1.1:16780] django.core.exceptions.ImproperlyConfigured: Error loading either pysqlite2 or sqlite3 modules (tried in that order): No module named '_sqlite3'
When running development server no errors appear. There is no errors as well when running in python interpreter in virtualenv cp
>>>import sqlite3
My wsgi.py file is:
import os, sys, site
sys.path.insert(0,'/var/www/.virtualenvs/cp/lib/python3.4/site-packages')
sys.path.insert(0,'/var/www/django_projects/cp')
os.environ['DJANGO_SETTINGS_MODULE'] = 'mysite.settings'
exec(open("/var/www/.virtualenvs/cp/bin/activate_this.py").read())
from django.core.wsgi import get_wsgi_application
application = get_wsgi_application()
Here is Apache's virtualhost's conf for the site:
<VirtualHost *:80>
ServerName cp.mysite.com
WSGIDaemonProcess cp user=www-data group=www-data threads=5
WSGIApplicationGroup cp
WSGIScriptAlias / /var/www/django_projects/cp/mysite/wsgi.py
<Directory /var/www/django_projects/cp/mysite>
<Files wsgi.py>
Require all granted
</Files>
</Directory>
ErrorLog /var/www/errlogs/cperror.log
</VirtualHost>

Answer 1

Finaly, after making a debug with a help of simple wsgi.py (thanks to #GrahamDumpleton for the link), I've found that my resulting sys.path is not too clean.
So I have manually changed sys.path in wsgi.py taking it from python started in virtualenv cp and then added project directory to this list at the begining in wsgi.py:
import os, sys
virtual_env = '/var/www/.virtualenvs/cp'
sys.path=['%s/lib/python34.zip' % (virtual_env,),
'%s/lib/python3.4' % (virtual_env,),
'%s/lib/python3.4/plat-linux' % (virtual_env,),
'%s/lib/python3.4/lib-dynload' % (virtual_env,),
'%s/lib/python3.4/site-packages' % (virtual_env,),
#'/var/www/python/3.4.3/lib/python3.4',
]
sys.path.insert(0,'/var/www/django_projects/cp')
os.environ['DJANGO_SETTINGS_MODULE'] = 'mysite.settings'
from django.core.wsgi import get_wsgi_application
application = get_wsgi_application()
Possibly this is not the "best practice" solution, but it does remove magic functions and easy to understand and repeat for new user like me :)