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Unparenthesized walrus is not allowed in genexps #86540
Description
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 2020-11-16.23:39:39.790>
created_at = <Date 2020-11-16.17:43:28.572>
labels = ['interpreter-core', 'type-bug', '3.9', '3.10']
title = 'Unparenthesized walrus is not allowed in genexps'
updated_at = <Date 2020-11-16.23:39:39.789>
user = 'https://github.com/lysnikolaou'bugs.python.org fields:
activity = <Date 2020-11-16.23:39:39.789>
actor = 'lys.nikolaou'
assignee = 'none'
closed = True
closed_date = <Date 2020-11-16.23:39:39.790>
closer = 'lys.nikolaou'
components = ['Interpreter Core']
creation = <Date 2020-11-16.17:43:28.572>
creator = 'lys.nikolaou'
dependencies = []
files = []
hgrepos = []
issue_num = 42374
keywords = ['patch', '3.9regression']
message_count = 3.0
messages = ['381133', '381178', '381185']
nosy_count = 5.0
nosy_names = ['gvanrossum', 'terry.reedy', 'lys.nikolaou', 'pablogsal', 'miss-islington']
pr_nums = ['23319', '23329']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue42374'
versions = ['Python 3.9', 'Python 3.10']
Activity
lysnikolaou commentedon Nov 16, 2020
While a walrus is valid withing generator expressions in 3.8, it's not in 3.9 and onward.
This is a regression introduced by the new parser.
miss-islington commentedon Nov 16, 2020
New changeset cb3e5ed by Lysandros Nikolaou in branch 'master':
bpo-42374: Allow unparenthesized walrus in genexps (GH-23319)
cb3e5ed
lysnikolaou commentedon Nov 16, 2020
New changeset 2b800ef by Lysandros Nikolaou in branch '3.9':
bpo-42374: Allow unparenthesized walrus in genexps (GH-23319) (GH-23329)
2b800ef