Vagrant, WSGI, virtualenv and TypeError: 'module' object is not callable

Question

I've provisioned a vagrant box for an app I'm building, but I'm running into trouble when trying to get Apache to serve it.

It's using a virtualenv for it's packages - right now that's just Flask and it's dependencies, and that's all working fine. I can SSH in and run the app within the env. The app itself is just the minimal application for now.

Apache error

[Sun Mar 31 10:06:54 2013] [error] [client 10.0.2.2] mod_wsgi (pid=1587): Exception occurred processing WSGI script '/vagrant/myapp/myapp.wsgi'.
[Sun Mar 31 10:06:54 2013] [error] [client 10.0.2.2] TypeError: 'module' object is not callable

Files

/vagrant
├── env
└── myapp
    ├── app.py
    └── myapp.wsgi

myapp.wsgi

activate_this = '/vagrant/env/bin/activate_this.py'
execfile(activate_this, dict(__file__=activate_this))

import sys
sys.path.insert(0, '/vagrant/myapp')

import app as application

Default site vhost

<VirtualHost *:80>

        WSGIDaemonProcess myapp user=www-data group=www-data threads=5
        WSGIScriptAlias / /vagrant/myapp/myapp.wsgi

        <Directory /vagrant/myapp>
                WSGIProcessGroup myapp
                WSGIApplicationGroup %{GLOBAL}
                Order deny,allow
                Allow from all
        </Directory>

        ErrorLog /var/log/apache2/error.log

</VirtualHost>

I've tried running Apache with the user and group vagrant and chowning the site-packages and app dir to www-data. I've also tried changing the WSGIDaemon user and group to vagrant.

I've tried adding the site-packages to the path, and I've tried adding __init__.py to myapp and changing myapp.wsgi to from myapp import app as application.

The app can be run with source ../env/bin/activate && python app.py.

I'm stumped.

Answer 1

The problem I had was in the wsgi file because I was importing the app package but not the class therein (caught out because they were named the same.)

activate_this = '/vagrant/env/bin/activate_this.py'
execfile(activate_this, dict(__file__=activate_this))

import sys
sys.path.insert(0, '/vagrant/myapp')

from app import app as application

Note the final line has changed from import app as application.