Deprecate the parser module

[vstinner]

BPO	37268
Nosy	@vstinner, @pablogsal, @miss-islington
PRs	bpo-37268: Add deprecation notice and a DeprecationWarning for the parser module #15017 bpo-37268: test_parser fails when run with -Werror #15183

^{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 2019-07-30.12:49:09.010>
created_at = <Date 2019-06-13.12:11:39.721>
labels = ['3.8', 'library']
title = 'Deprecate the parser module'
updated_at = <Date 2019-08-08.21:48:04.757>
user = 'https://github.com/vstinner'

bugs.python.org fields:

activity = <Date 2019-08-08.21:48:04.757>
actor = 'miss-islington'
assignee = 'none'
closed = True
closed_date = <Date 2019-07-30.12:49:09.010>
closer = 'pablogsal'
components = ['Library (Lib)']
creation = <Date 2019-06-13.12:11:39.721>
creator = 'vstinner'
dependencies = []
files = []
hgrepos = []
issue_num = 37268
keywords = ['patch']
message_count = 8.0
messages = ['345504', '345506', '345507', '345522', '348704', '348706', '348735', '349260']
nosy_count = 3.0
nosy_names = ['vstinner', 'pablogsal', 'miss-islington']
pr_nums = ['15017', '15183']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue37268'
versions = ['Python 3.8']

[vstinner]

The parser module should be deprecated as soon as possible according to Pablo Galindo Salgo and Guido van Rossum:

• https://mail.python.org/pipermail/python-dev/2019-May/157464.html
• https://bugs.python.org/issue37253#msg345398

I propose to deprecate it in Python 3.8: add a note in the documentation and emit a DeprecationWarning on "import parser".

[vstinner]

I searched for "import parser" in GitHub code search, but I failed to find any project using the Python stdlib parser module. I only found copies of the CPython code source which has on "import parser" in Lib/test/test_parser.py.

[vstinner]

Pablo: Are you interested to implement this change?

[pablogsal]

Yep, will make a PR soon.

[vstinner]

Yep, will make a PR soon.

Any update on deprecating the parser module?

[pablogsal]

Any update on deprecating the parser module?

Wish granted: PR 15017

[miss-islington]

New changeset 9211e2f by Miss Islington (bot) (Pablo Galindo) in branch 'master':
bpo-37268: Add deprecation notice and a DeprecationWarning for the parser module (GH-15017)
9211e2f

[miss-islington]

New changeset 10a0a09 by Miss Islington (bot) (Zackery Spytz) in branch 'master':
bpo-37268: test_parser fails when run with -Werror (GH-15183)
10a0a09