Possible improvement for CoordinateEncoder

[OshinoMoumou]

Greetings!
I noticed that in dev/utils.py, your method CoordinateEncoder referred a StackOverflow post, while a recent comment to it noted that the method works for json.dumps, json.loads and json.load, but not json.dump to file. Another comment fixed that problem.
I'm trying to learn the usefulness of such small updates on StackOverflow. Would this comment help improve your code? I understand that such improvement might not be helpful in real life situation. In that case, do you think this comment can help prevent future bugs (for example, when the code were reused somewhere else)?
I'll really appreciate it if you could kindly give me some feedback or suggestions. Thank you very much for your time.
Have a nice day!