Make member objects inspectable.

[rhettinger]

BPO	40276
Nosy	@rhettinger, @pablogsal

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

Show more details

GitHub fields:

assignee = None
closed_at = <Date 2020-04-15.08:42:42.689>
created_at = <Date 2020-04-14.01:12:01.782>
labels = ['interpreter-core', 'easy', 'type-feature', '3.9']
title = 'Make member objects inspectable.'
updated_at = <Date 2020-04-15.08:42:42.688>
user = 'https://github.com/rhettinger'

bugs.python.org fields:

activity = <Date 2020-04-15.08:42:42.688>
actor = 'rhettinger'
assignee = 'none'
closed = True
closed_date = <Date 2020-04-15.08:42:42.689>
closer = 'rhettinger'
components = ['Interpreter Core']
creation = <Date 2020-04-14.01:12:01.782>
creator = 'rhettinger'
dependencies = []
files = []
hgrepos = []
issue_num = 40276
keywords = ['easy (C)']
message_count = 3.0
messages = ['366356', '366492', '366497']
nosy_count = 2.0
nosy_names = ['rhettinger', 'pablogsal']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue40276'
versions = ['Python 3.9']

[rhettinger]

Given:

    class A:
        __slots__ = ['x', 'y', 'z')

    mo = vars(A)['x']

The field number should be viewable:

    >>> mo.offset
    0

And the __repr__ should be:

    >>> mo
    <member 'x' at slot_offset 0 of 'A' objects>

[pablogsal]

What should this return?

>>> class A:
...   __slots__ = ['x', 'y', 'z']
...
>>> class B(A):
...   __slots__ = ['g','i']
...

>> B.x.offset

[rhettinger]

Good point. I'll withdraw this.