Don't use dunder instance attributes or methods

[peterbe]

Class instance attributes called __dunder_name are not override'able. For example, you can't do this:

class MyKeyCDNAPI(keycdn.Api):
    def __execute(self, *a, **k):  # Never gets called!
         blablabla

As a point, why are any of them private at all? What's the point of hiding things like __api_key? Why not just call it api_key. Then you don't need the setter or the getter. E.g.:

ENDPOINT = 'https://api.keycdn.com'

class Api:
     def __init__(self, api_key, endpoint=ENDPOINT):
          self.api_key = api_key
          self.endpoint = endpoint

    ... 
    def get(...):
    def post(...):
    def put(...):
    def delete(...):

    def _execute(self, call, **params):  # the only one that makes sense to make private
        ...

a = Api(MY_API_KEY)
print(a.endpoint)
print(a.api_key)
a.api_key = MY_OTHER_API_KEY