There are three ways to get the latest updates.
Note: Subscribers in Ghost is in beta and doesn't automatically email for new posts. I send emails manually whenever I write a major post for now.
You can follow the feed for all posts on Feedly or your favorite RSS reader.
You can follow the feed for just a specific tag, for example, python posts:
Python posts are automatically aggregated into Planet Python, which I recommend subscribing to if you write Python code regularly.