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Make lib2to3 grammar better match Python, support the := walrus #80722

@thatch

Description

@thatch
mannequin
BPO 36541
Nosy @birkenfeld, @gpshead, @benjaminp, @thatch, @ambv, @fireattack, @lisroach, @pablogsal, @miss-islington, @isidentical
PRs
  • bpo-36541: lib2to3: Support named assignment expressions #12702
  • bpo-36541: lib2to3: Support complex expressions in *args and **kwargs. #12703
  • [3.8] bpo-36541: lib2to3: Support named assignment expressions (GH-12702) #19315
  • [3.7] bpo-36541: lib2to3: Support named assignment expressions (GH-12702) #19317
  • bpo-36541: Add lib2to3 grammar PEP-570 pos-only arg parsing #23759
  • [3.9] bpo-36541: Add lib2to3 grammar PEP-570 pos-only arg parsing (GH-23759) #23768
  • [3.8] bpo-36541: Add lib2to3 grammar PEP-570 pos-only arg parsing (GH-23759) #23769
  • 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 = 'https://github.com/gpshead'
    closed_at = <Date 2020-12-14.18:13:48.449>
    created_at = <Date 2019-04-06.01:41:20.878>
    labels = ['3.8', 'type-bug', 'expert-2to3', '3.9', '3.10']
    title = 'Make lib2to3 grammar better match Python, support the := walrus'
    updated_at = <Date 2020-12-14.18:13:48.449>
    user = 'https://github.com/thatch'

    bugs.python.org fields:

    activity = <Date 2020-12-14.18:13:48.449>
    actor = 'gregory.p.smith'
    assignee = 'gregory.p.smith'
    closed = True
    closed_date = <Date 2020-12-14.18:13:48.449>
    closer = 'gregory.p.smith'
    components = ['2to3 (2.x to 3.x conversion tool)']
    creation = <Date 2019-04-06.01:41:20.878>
    creator = 'thatch'
    dependencies = []
    files = []
    hgrepos = []
    issue_num = 36541
    keywords = ['patch']
    message_count = 21.0
    messages = ['339522', '339669', '339796', '340791', '340802', '340848', '355108', '355252', '365716', '365717', '365718', '379062', '382516', '382594', '382606', '382608', '382609', '382962', '382994', '382996', '382997']
    nosy_count = 11.0
    nosy_names = ['georg.brandl', 'gregory.p.smith', 'benjamin.peterson', 'thatch', 'lukasz.langa', 'fireattack', 'lisroach', 'pablogsal', 'miss-islington', 'BTaskaya', 'Peter Ludemann']
    pr_nums = ['12702', '12703', '19315', '19317', '23759', '23768', '23769']
    priority = 'normal'
    resolution = 'fixed'
    stage = 'commit review'
    status = 'closed'
    superseder = None
    type = 'behavior'
    url = 'https://bugs.python.org/issue36541'
    versions = ['Python 3.8', 'Python 3.9', 'Python 3.10']

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