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Provide method to get list of logging level names #88024

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Provide method to get list of logging level names#88024
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vsajip
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3.11only security fixesstdlibStandard Library Python modules in the Lib/ directorytype-featureA feature request or enhancement

Description

@andylowry
andylowry
mannequin
opened on Apr 15, 2021
BPO 43858
Nosy @rhettinger, @vsajip, @ericvsmith, @miss-islington, @akulakov, @shreyanavigyan, @andylowry
PRs
  • bpo-43858: Add logging.getLevelNamesMapping() #26459
    		•

    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/vsajip'
closed_at = <Date 2021-06-03.08:59:30.308>
created_at = <Date 2021-04-15.17:46:57.939>
labels = ['type-feature', 'library', '3.11']
title = 'Provide method to get list of logging level names'
updated_at = <Date 2021-06-03.08:59:30.303>
user = 'https://github.com/andylowry'

    bugs.python.org fields:

    activity = <Date 2021-06-03.08:59:30.303>
actor = 'vinay.sajip'
assignee = 'vinay.sajip'
closed = True
closed_date = <Date 2021-06-03.08:59:30.308>
closer = 'vinay.sajip'
components = ['Library (Lib)']
creation = <Date 2021-04-15.17:46:57.939>
creator = 'andylowry'
dependencies = []
files = []
hgrepos = []
issue_num = 43858
keywords = ['patch']
message_count = 6.0
messages = ['391145', '391147', '393833', '394764', '394765', '394989']
nosy_count = 7.0
nosy_names = ['rhettinger', 'vinay.sajip', 'eric.smith', 'miss-islington', 'andrei.avk', 'shreyanavigyan', 'andylowry']
pr_nums = ['26459']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue43858'
versions = ['Python 3.11']

    Activity

    1. andylowry commented on Apr 15, 2021

      @andylowry
      andylowrymannequin
      on Apr 15, 2021
      MannequinAuthor

      It would be useful to have something like a getLevelNames method to return the current list of level names, ordered by priority.

      This currently appears to be available only by accessing a private member, like _levelToName or _nameToLevel.

      This functionality is useful, for example, in populating a choices list for an argparse option to allow a user to select a logging level when launching a program from a command line.

    2. andylowry
      added
      3.8 (EOL)end of life
      stdlibStandard Library Python modules in the Lib/ directory
      on Apr 15, 2021

    3. shreyanavigyan commented on Apr 15, 2021

      @shreyanavigyan
      shreyanavigyanmannequin
      on Apr 15, 2021
      Mannequin

      I agree with you. It would be nice to have a function to list or dictionary of level names. Moreover I suggest that there should be an argument to the function like format_level which can take in "dict:level_name" for returning a dictionary with the level as keys and name as values, "dict:name_level" for returning a dictionary with the name as keys and level as values or "list" for returning just the list of level names ordered by priority.

    4. akulakov commented on May 17, 2021

      @akulakov
      akulakov
      on May 17, 2021
      Contributor

      I can add getLevelNamesDict() which would return a copy of _nameToLevel, which is currently

      _nameToLevel = {
    'CRITICAL': CRITICAL,
    'FATAL': FATAL,
    'ERROR': ERROR,
    'WARN': WARNING,
    'WARNING': WARNING,
    'INFO': INFO,
    'DEBUG': DEBUG,
    'NOTSET': NOTSET,
}

      I think it may be best not to return a list of levels because it's not obvious that some of them are aliases, if the caller is responsible for making the list out of the dict, they will be able to decide how to deal with alias levels.

      If that sounds good I can make a PR..

    5. andylowry commented on May 30, 2021

      @andylowry
      andylowrymannequin
      on May 30, 2021
      MannequinAuthor

      @andrei.avk Yes, that sounds just fine. Many thanks.

    6. rhettinger commented on May 30, 2021

      @rhettinger
      rhettinger
      on May 30, 2021
      Contributor

      I can add getLevelNamesDict() which would return a copy of _nameToLevel

      That seem like the best approach.

    7. rhettinger
      assigned
      vsajip
      on May 30, 2021

    8. miss-islington commented on Jun 3, 2021

      @miss-islington
      miss-islington
      on Jun 3, 2021
      Contributor

      New changeset 8b93f0e by andrei kulakov in branch 'main':
      bpo-43858: Add logging.getLevelNamesMapping() (GH-26459)
      8b93f0e

    9. vsajip
      added
      3.11only security fixes
      and removed
      3.8 (EOL)end of life
      on Jun 3, 2021
    10. vsajip
      closed this as completedon Jun 3, 2021
    11. vsajip
      added
      3.11only security fixes
      type-featureA feature request or enhancement
      and removed
      3.8 (EOL)end of life
      on Jun 3, 2021
    12. vsajip
      closed this as completedon Jun 3, 2021
    13. vsajip
      added
      type-featureA feature request or enhancement
      on Jun 3, 2021
    14. ezio-melotti
      transferred this issue fromon Apr 10, 2022
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