Reed <[email protected]> added the comment:
Thank you for the clarification. I didn't realize the section only referred to
types, but it makes sense now that I read the documentation more carefully.
The documentation is still incorrect for certain attributes (e.g. __bases__ and
__name__) as they can be mutated. For example:
class A: pass
A.__name__ = 'AA'
class B(A): pass
class C(B): pass
C.__bases__ = (A,)
Also, this documentation is incorrectly linked to by other parts of the
documentation. For example, in
https://docs.python.org/3/reference/datamodel.html#the-standard-type-hierarchy,
there is the sentence:
"Special attributes: __dict__ is the attribute dictionary; __class__ is the
instance’s class."
__dict__ and __class__ link to the documentation about types, and yet that
sentence is referring to all instances of any class (such as `A()`), not just
type objects (such as `A`).
In terms of concrete improves, I would suggest:
* Adding a section somewhere describing __dict__ and __class__ for all
instances, not just types. Or change the original section to refer to all
instances.
Assuming the original section is not changed to refer to all instances:
* In the sentence "The implementation adds a few special read-only
attributes to several object types", replace "object types" with "types" or
"instances whose class subclasses from `type`"
* Replace `instance.class` with `class.class`. The phrase `instance` is
confusing, as it then describes `class.__bases__`, which does explicitly use
the word "class" to indicate it only applies to classes.
----------
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Python tracker <[email protected]>
<https://bugs.python.org/issue38099>
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