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