[Answer]-Django Push Notification to IOS

Did you read the related link in the blog entry you posted?

http://www.raywenderlich.com/32960/apple-push-notification-services-in-ios-6-tutorial-part-1

It explains that you need to set up an SSL certificate to make use of push notifications:

You need to make a new App ID and provisioning profile for each app that uses push, as well as an SSL certificate for the server. You do this at the iOS Provisioning Portal.

Here is a related question:

• Generate .pem file Used to setup Apple PUSH Notification
• generate push notification ssl certificate and provision using new apple panel for development?