Remove deprecated inspect functions

[hugovk]

BPO	45320
Nosy	@ambv, @hugovk, @tirkarthi
PRs	bpo-45320 Remove deprecated inspect methods #28618 bpo-45903: Fix typo in What's New: Signature.from_builtin is removed #29813

^{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 2021-10-20.18:49:31.612>
created_at = <Date 2021-09-29.12:22:30.020>
labels = ['library', '3.11']
title = 'Remove deprecated inspect functions'
updated_at = <Date 2021-11-27.08:45:34.764>
user = 'https://github.com/hugovk'

bugs.python.org fields:

activity = <Date 2021-11-27.08:45:34.764>
actor = 'hugovk'
assignee = 'none'
closed = True
closed_date = <Date 2021-10-20.18:49:31.612>
closer = 'lukasz.langa'
components = ['Library (Lib)']
creation = <Date 2021-09-29.12:22:30.020>
creator = 'hugovk'
dependencies = []
files = []
hgrepos = []
issue_num = 45320
keywords = ['patch']
message_count = 6.0
messages = ['402860', '402877', '402890', '402906', '404515', '404516']
nosy_count = 3.0
nosy_names = ['lukasz.langa', 'hugovk', 'xtreak']
pr_nums = ['28618', '29813']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue45320'
versions = ['Python 3.11']

[hugovk]

inspect.getargspec was deprecated in docs since 3.0 (https://docs.python.org/3.0/library/inspect.html?highlight=getargspec#inspect.getargspec), raising a DeprecationWarning since 3.5 (bpo-20438, 3cfec2e).

inspect.formatargspec was deprecated in docs since 3.5 (https://docs.python.org/3.5/library/inspect.html?highlight=getargspec#inspect.formatargspec), raising a DeprecationWarning since 3.8 (bpo-33582, 46c5cd0).

Undocumented inspect.Signature.from_function and inspect.Signature.from_builtin in docs and by raising a DeprecationWarning since 3.5 (bpo-20438, 3cfec2e).

These can be removed in Python 3.11.

[ambv]

Have you done any checks how much external code is using the deprecated callables in the wild? I remember when the 3.5 deprecations started, a lot of libraries started emitting them because they stuck to getargspec which was Python 2 compatible.

[tirkarthi]

Slightly related, inspect.getfullargspec was also deprecated and later undeprecated. Please find the discussion post this message

https://bugs.python.org/issue36751#msg341128

https://bugs.python.org/issue37010

[hugovk]

Of the 188 repos I managed to clone of 200 top PyPI packages, looks like these 9 are still calling them:

botocore
client_python
cython
google-api-python-client
grpc
ipython
pycodestyle
pyrsistent
wrapt

Details at #28618 (comment)

[ambv]

New changeset d89fb9a by Hugo van Kemenade in branch 'main':
bpo-45320: Remove long-deprecated inspect methods (GH-28618)
d89fb9a

[ambv]

Thanks, Hugo! ✨ 🍰 ✨