ast.Slice 3.9.6 documentation bug

[c3-timjbaer]

BPO	44538
Nosy	@serhiy-storchaka, @c3-timjbaer

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

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GitHub fields:

assignee = None
closed_at = <Date 2021-06-30.16:09:04.618>
created_at = <Date 2021-06-29.23:41:33.697>
labels = ['type-bug', 'invalid', '3.9', 'docs']
title = 'ast.Slice 3.9.6 documentation bug'
updated_at = <Date 2021-06-30.16:09:04.617>
user = 'https://github.com/c3-timjbaer'

bugs.python.org fields:

activity = <Date 2021-06-30.16:09:04.617>
actor = 'c3-timjbaer'
assignee = 'docs@python'
closed = True
closed_date = <Date 2021-06-30.16:09:04.618>
closer = 'c3-timjbaer'
components = ['Documentation']
creation = <Date 2021-06-29.23:41:33.697>
creator = 'c3-timjbaer'
dependencies = []
files = []
hgrepos = []
issue_num = 44538
keywords = []
message_count = 3.0
messages = ['396765', '396769', '396781']
nosy_count = 3.0
nosy_names = ['docs@python', 'serhiy.storchaka', 'c3-timjbaer']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue44538'
versions = ['Python 3.9']

[c3-timjbaer]

Based off the ast 3.9.6 documentation (https://docs.python.org/3/library/ast.html), we would expect Slice to inherit from expr. However, looking at ast.Slice.__mro__ produces the following output: (<class '_ast.Slice'>, <class '_ast.slice'>, <class '_ast.AST'>, <class 'object'>).

It appears that instead of inheriting from expr, Slice inherits from slice which appears to be a deprecated type.

[serhiy-storchaka]

What Python version did you tried?

[c3-timjbaer]

I was using 3.8. I followed the same steps on 3.9 and confirmed it worked - closing now.