Designing an API client

I need to design and implement a client for a couple of APIs. I went searching for posts, comments and suggestions on how to build it but I couldn't find much.

I decided to use the Google API client and the Twilio API client as a reference and design guide.

Is this a good approach? Can you recommend materials I can read?

My language of choice for this project is Python and the website APIs I need to make requests to are: - Green Button - Solar City - Locus Energy - and similar