Python: why is __dict__ attribute not in built-in class instances

Question

If my understanding of the Python data model is correct, both classes and class instances have associated __dict__ objects which contain all the attributes. Ho

Answer 1

Instances of types defined in C don't have a __dict__ attribute by default.

Answer 2

Just to add to this:

You can get the equivalent of a read only __dict__ using this:

{s:getattr(x,s) for x in dir(x)}