What libraries, if any, can be used to take an Elixir list: [color: "Red", make: "Mclaren", mileage: 15641.469] and convert into a Python dictionary - {"color": "Red", "make": "Mclaren", "mileage": 15641.469}?
If no such libraries exist, what approach would you recommend to accomplish this efficiently?
What you mean by “convert”? If you want to send it to the other program then you need to serialise it into some format understood by the both parties and then send it. For example you can use JSON, BARE, ProtoBuf, bencode, ETF, Cap’n’proto or almost any other format out there.