[Python-Dev] Re: Let's Fix Class Annotations -- And Maybe Annotations Generally

On 1/18/21 5:53 PM, Ethan Furman wrote:

`__prepare__` returns a dict-like namespace that is used as is.  `EnumMeta` uses `__prepare__` to return an instance of `_EnumDict`.

When `type.__new__` is called, whatever the namespace used to be is then converted into a normal Python dict, and a mappingproxy is returned for all further `cls.__dict__` requests.

To be more precise, when `__prepare__` is called, there is no class, and therefore no `class.__dict__`. -- ~Ethan~