For a basic introduction take a look at What is CircuitPython and see some example scripts. To dig a little deeper, check out the many resources in Awesome CircuitPython. The whole thing is open source so you can see their code. If you are thinking about contributing (or just want some fun chats), get in touch on the CircuitPython channel of the Adafruit Discord server: adafru.it/discord
Many of the language’s design choices favor ease-of-use over ready-for-production. Imagine teaching an intro to programming class without worrying what computers will be used or how to get compilers installed on everyone’s machines before time runs out.
One final note: Kattni did a project that gave us the show title: Piano in the Key of Lime. After we finished recording, Chris asked her why she didn’t add a kiwi fruit to her mix… Kattni explained she had limes and they were small. Chris only wanted a different fruit so she could rename it Piano in the Kiwi of Lime. It is always sad when we stop recording too early.