Quick snippet for upgrading Django installs across multiple sites on Webfaction (see http://www.dominicrodger.com/upgrading-django.html)

gistfile1.py

from fabric.api import env, run, cd, hide, prefix

env.use_ssh_config = True
env.hosts = ['dmr', ]

django_apps = {
    'dmr': ['myappname',
            'myotherapp', ],
}

def get_django_version(app):
    with cd('~/webapps/%s/' % app), hide('running', 'stdout'), prefix('source env/bin/activate'):
        result = run('pip freeze | grep "^Django=="')
        django, version=result.split('==')
        return version

def upgrade_django_install(app, version):
    with cd('~/webapps/%s/' % app), prefix('source env/bin/activate'):
        run('pip install Django==%s' % version)
        run('apache2/bin/restart')

def upgrade_django(from_version, to_version):
    apps = django_apps[env.host_string]
    for app in apps:
        version = get_django_version(app)
        if version == from_version:
            print "Current version of Django for %s is %s, upgrading to %s..." % (app, version, to_version)
            upgrade_django_install(app, to_version)
        else:
            print "Current version of Django for %s is %s, no upgrade needed." % (app, version)