Python uses the loads method from the json to load JSON from a string. Did you notice the quotes around that dictionary that you created for the JSON? That's because Python treats JSON as a string unless it's coming from a file. You don't really need to worry about it too much. Just know that this form handles data while load handles files. Try loading the JSON.
This is a companion discussion topic for the original entry at https://linuxconfig.org/how-to-parse-data-from-json-into-python