Beta instructions confusing

In the beta welcome email, it says this:

Quick Start

To use Let's Encrypt's official client to obtain your real certificates, you will need to provide the production API URL on the command line:
When running the Python client (installation directions [1]), be sure to specify the --server argument with the production URL:

Upon initial read, it sounded like there was both a "Python client" and an "official client." It's not clear that's there's only one client / these are the same thing.