SyntaxError on 1not in...

[pxeger]

BPO	46820
Nosy	@serhiy-storchaka, @lysnikolaou, @pablogsal, @miss-islington, @pxeger
PRs	bpo-46820: Fix a SyntaxError in a numeric literal followed by "not in" #31479 [3.10] bpo-46820: Fix a SyntaxError in a numeric literal followed by "not in" (GH-31479) #31493 bpo-46820: Refactor tests for ambiguous end of numerical literal #31494 [3.10] bpo-46820: Refactor tests for ambiguous end of numerical literal (GH-31494) #31566

^{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 2022-02-25.13:09:25.795>
created_at = <Date 2022-02-21.17:50:03.941>
labels = ['interpreter-core', 'type-bug', '3.10', '3.11']
title = 'SyntaxError on `1not in...`'
updated_at = <Date 2022-02-25.13:09:25.794>
user = 'https://github.com/pxeger'

bugs.python.org fields:

activity = <Date 2022-02-25.13:09:25.794>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = True
closed_date = <Date 2022-02-25.13:09:25.795>
closer = 'serhiy.storchaka'
components = ['Parser']
creation = <Date 2022-02-21.17:50:03.941>
creator = 'pxeger'
dependencies = []
files = []
hgrepos = []
issue_num = 46820
keywords = ['patch']
message_count = 6.0
messages = ['413664', '413672', '413696', '413697', '413969', '413971']
nosy_count = 5.0
nosy_names = ['serhiy.storchaka', 'lys.nikolaou', 'pablogsal', 'miss-islington', 'pxeger']
pr_nums = ['31479', '31493', '31494', '31566']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue46820'
versions = ['Python 3.10', 'Python 3.11']

[pxeger]

The following code gives a SyntaxError in 3.10, but used to work fine before (I have tested it in 2.7, 3.8, 3.9):

1not in [2, 3]

It seems to be only the not in syntax which is affected; all other keywords still work correctly:

1in [2, 3]
1or 2
1and 2
1if 1else 1
1is 1

I know this syntax is deprecated in 3.10 (bpo-43833), but it still needs to work for now, so that old code written like this can keep working.

[serhiy-storchaka]

Good catch. Thank you for your report Patrick.

[serhiy-storchaka]

New changeset 090e5c4 by Serhiy Storchaka in branch 'main':
bpo-46820: Fix a SyntaxError in a numeric literal followed by "not in" (GH-31479)
090e5c4

[serhiy-storchaka]

New changeset f20ac2e by Miss Islington (bot) in branch '3.10':
bpo-46820: Fix a SyntaxError in a numeric literal followed by "not in" (GH-31479) (GH-31493)
f20ac2e

[serhiy-storchaka]

New changeset 98c3bea by Serhiy Storchaka in branch 'main':
bpo-46820: Refactor tests for ambiguous end of numerical literal (GH-31494)
98c3bea

[miss-islington]

New changeset c7a0fd2 by Miss Islington (bot) in branch '3.10':
bpo-46820: Refactor tests for ambiguous end of numerical literal (GH-31494)
c7a0fd2