dict __dict__ attribute missing

[dumoulina]

Bug report

Bug description:

vars(dict())

raises the exception:

vars() argument must have __dict__ attribute

I would assume this fix to be quite affordable by returning itself. It could potentially create infinite loops but I think breaking vars() call is even worse as it should not assume any type.

CPython versions tested on:

3.13

Operating systems tested on:

Linux

[serhiy-storchaka]

Many instances of builtin types do not have the __dict__ attribute. They do not it, this saves memory and time, and allows caching immutable objects. Do you have a use case for a dict with __dict__? Then you can use a simple subclass:

class MyDict(dict):
     pass