Create permissions or anything else after syncdb of an app has finished.

management.py

This should be located in: yourapp/management.py

from django.db.models.signals import post_syncdb
from django.contrib.auth import models as auth_models
from django.contrib.auth.models import User, Permission
from django.contrib.contenttypes.models import ContentType

def create_supervision_permissions(sender, **kwargs):
    print '== create_supervision_permissions =='
    # create a content type for the app if it doesn't already exist
    ct, created = ContentType.objects.get_or_create(model = '', app_label = 'Supervision', defaults = {'name': 'Supervision'})

    # create a permission if it doesn't already exist
    can_view_statistics = Permission.objects.get_or_create(
            codename = 'can_view_statistics',
            content_type__pk = ct.id, defaults = {'name': 'Can view statistics', 'content_type': ct} )

# Run create_supervision_permissions just after syncdb has finished to install the models of the auth app.
post_syncdb.connect(create_supervision_permissions, sender=auth_models)