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Remove re.template() and re.TEMPLATE #91367

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serhiy-storchaka opened this issue Apr 4, 2022 · 2 comments
Closed

Remove re.template() and re.TEMPLATE #91367

serhiy-storchaka opened this issue Apr 4, 2022 · 2 comments
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3.11 only security fixes stdlib Python modules in the Lib dir topic-regex type-feature A feature request or enhancement

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@serhiy-storchaka
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BPO 47211
Nosy @ezio-melotti, @serhiy-storchaka, @animalize
PRs
  • bpo-47211: Remove function re.template() and flag re.TEMPLATE #32300
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    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 2022-04-06.17:04:13.978>
created_at = <Date 2022-04-04.08:56:13.302>
labels = ['expert-regex', 'type-feature', 'library', '3.11']
title = 'Remove re.template() and re.TEMPLATE'
updated_at = <Date 2022-04-06.17:04:13.978>
user = 'https://github.com/serhiy-storchaka'

    bugs.python.org fields:

    activity = <Date 2022-04-06.17:04:13.978>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = True
closed_date = <Date 2022-04-06.17:04:13.978>
closer = 'serhiy.storchaka'
components = ['Library (Lib)', 'Regular Expressions']
creation = <Date 2022-04-04.08:56:13.302>
creator = 'serhiy.storchaka'
dependencies = []
files = []
hgrepos = []
issue_num = 47211
keywords = ['patch']
message_count = 2.0
messages = ['416658', '416884']
nosy_count = 4.0
nosy_names = ['ezio.melotti', 'mrabarnett', 'serhiy.storchaka', 'malin']
pr_nums = ['32300']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue47211'
versions = ['Python 3.11']
    @serhiy-storchaka
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    They were added in 436c3d5 (between 1.6a2 and 2.0), but the purpose is not known. See also https://mail.python.org/archives/list/python-dev@python.org/message/DVSQGM5LO4TK63C63H6KQ6XBTBQGFLEN/. The feature was not fully implemented, and it was disabled short time later in 29c4ba9. Currently the only effect of this flag is that repetition operators (+, *, ?, {}) do not work. A comment was added in 3562f11:

    SRE_FLAG_TEMPLATE = 1 # template mode (disable backtracking)

    It's all. I guess it could have some relation to possessive repetition operators, except that it is a global flag.

    I think it should be removed without deprecation because it never really worked and never was documented.

    @serhiy-storchaka serhiy-storchaka added 3.11 only security fixes stdlib Python modules in the Lib dir topic-regex type-feature A feature request or enhancement labels Apr 4, 2022
    @serhiy-storchaka
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    New changeset b09184b by Serhiy Storchaka in branch 'main':
    bpo-47211: Remove function re.template() and flag re.TEMPLATE (GH-32300)
    b09184b

    @ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
    jwilk added a commit to jwilk/pydiatra that referenced this issue May 11, 2022
    @jwilk
    pydiatra.check_re: drop support for re.template().
    ec025f0 
    re.template() was removed in Python 3.11:
python/cpython#91367

The function is so obscure, it's not worth supporting.
    @vstinner vstinner mentioned this issue May 12, 2022
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