[issue43770] Rework C types initialization

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

PR 25275: this is a subtle difference if PyTypeObject.tp_setattro is set statically to PyObject_GenericSetAttr() or if it's inherited by PyType_Ready().

Reference (master)::

* BaseException.__dict__['__setattr__'] = <slot wrapper '__setattr__' of 'BaseException' objects>
* BaseException.__setattr__ = <slot wrapper '__setattr__' of 'BaseException' objects>

With the PR:

* no '__setattr___' in BaseException.__dict__
* BaseException.__setattr__ = <slot wrapper '__setattr__' of 'object' objects>

Because of that, doctest.DocTestFinder().find(builtins) returns less items, and so test_doctest fails.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue43770>
_______________________________________