[issue38099] __dict__ attribute is incorrectly stated to be read-only

2019-09-11 Thread Reed
Reed 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.

[issue38099] __dict__ attribute is incorrectly stated to be read-only

2019-09-11 Thread Steven D'Aprano
Steven D'Aprano added the comment: Oh, another point... Python is a little more complicated than some other languages, like Java, because Python classes (types) are themselves instances (objects) of yet another class (the so called "metaclass"). Ultimately, all classes are instances of

[issue38099] __dict__ attribute is incorrectly stated to be read-only

2019-09-11 Thread Steven D'Aprano
Steven D'Aprano added the comment: "The implementation adds a few special read-only attributes to several object TYPES" [emphasis added] py> class MyType: ... pass ... py> MyType.__dict__ = {} Traceback (most recent call last): File "", line 1, in AttributeError: attribute '__dict__'

[issue38099] __dict__ attribute is incorrectly stated to be read-only

2019-09-11 Thread Reed
New submission from Reed : The documentation in this section (https://docs.python.org/3/library/stdtypes.html#special-attributes) states that the __dict__ attribute, and several others, are read-only. In particular, it states: "The implementation adds a few special read-only attributes to