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Display DeprecationWarning, PendingDeprecationWarning and ImportWarning in debug mode #76269

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Display DeprecationWarning, PendingDeprecationWarning and ImportWarning in debug mode#76269
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3.7 (EOL)end of lifestdlibStandard Library Python modules in the Lib/ directorytype-featureA feature request or enhancement

Description

@vstinner
vstinner
opened on Nov 20, 2017
BPO 32088
Nosy @warsaw, @vstinner, @ambv
PRs
  • bpo-32088: Display Deprecation in debug mode #4474
    		•

    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 2017-11-20.17:48:41.611>
created_at = <Date 2017-11-20.14:26:42.890>
labels = ['3.7', 'type-feature', 'library']
title = 'Display DeprecationWarning, PendingDeprecationWarning and ImportWarning in debug mode'
updated_at = <Date 2017-11-20.17:48:41.610>
user = 'https://github.com/vstinner'

    bugs.python.org fields:

    activity = <Date 2017-11-20.17:48:41.610>
actor = 'lukasz.langa'
assignee = 'none'
closed = True
closed_date = <Date 2017-11-20.17:48:41.611>
closer = 'lukasz.langa'
components = ['Library (Lib)']
creation = <Date 2017-11-20.14:26:42.890>
creator = 'vstinner'
dependencies = []
files = []
hgrepos = []
issue_num = 32088
keywords = ['patch']
message_count = 4.0
messages = ['306547', '306549', '306571', '306572']
nosy_count = 3.0
nosy_names = ['barry', 'vstinner', 'lukasz.langa']
pr_nums = ['4474']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue32088'
versions = ['Python 3.7']

    Activity

    1. vstinner commented on Nov 20, 2017

      @vstinner
      vstinner
      on Nov 20, 2017
      MemberAuthor

      Related python-dev thread:
      https://mail.python.org/pipermail/python-dev/2017-November/150608.html
      "[Python-Dev] Show DeprecationWarning in debug mode?"

      I propose to display Display DeprecationWarning, PendingDeprecationWarning and ImportWarning when Python is compiled in debug mode.

      Attached PR implements proposed change.

    2. vstinner
      added
      3.7 (EOL)end of life
      stdlibStandard Library Python modules in the Lib/ directory
      type-featureA feature request or enhancement
      on Nov 20, 2017

    3. vstinner commented on Nov 20, 2017

      @vstinner
      vstinner
      on Nov 20, 2017
      MemberAuthor

      Warnings filters in debug mode.

      Reference (current code):

      $ ./python -c 'import warnings, pprint; pprint.pprint(warnings.filters)'
[('ignore', None, <class 'DeprecationWarning'>, None, 0),
 ('ignore', None, <class 'PendingDeprecationWarning'>, None, 0),
 ('ignore', None, <class 'ImportWarning'>, None, 0),
 ('ignore', None, <class 'BytesWarning'>, None, 0),
 ('always', None, <class 'ResourceWarning'>, None, 0)]

      With my PR 4474:

      $ ./python -c 'import warnings, pprint; pprint.pprint(warnings.filters)'
[('ignore', None, <class 'BytesWarning'>, None, 0),
 ('always', None, <class 'ResourceWarning'>, None, 0)]

      BytesWarning is not modified by my PR since this specific warning is controlled by the -b option. Example with my PR.

      -b option, ignore => default:

      $ ./python -b -c 'import warnings, pprint; pprint.pprint(warnings.filters)'
[('default', None, <class 'BytesWarning'>, None, 0),
 ('always', None, <class 'ResourceWarning'>, None, 0)]

      -bb option, ignore => error:

      $ ./python -bb -c 'import warnings, pprint; pprint.pprint(warnings.filters)'
[('error', None, <class 'BytesWarning'>, None, 0),
 ('always', None, <class 'ResourceWarning'>, None, 0)]

      Note: While writing this comment, I also found a bug in the new developer mode (-X dev): bpo-32089.

    4. ambv commented on Nov 20, 2017

      @ambv
      ambv
      on Nov 20, 2017
      Contributor

      New changeset 895862a by Łukasz Langa (Victor Stinner) in branch 'master':
      bpo-32088: Display Deprecation in debug mode (bpo-4474)
      895862a

    5. ambv commented on Nov 20, 2017

      @ambv
      ambv
      on Nov 20, 2017
      Contributor

      Merged. This is an important improvement to make sure 3.7's quality is the best possible.

      Thanks! ✨ 🍰 ✨

    6. ambv
      closed this as completedon Nov 20, 2017
    7. ezio-melotti
      transferred this issue fromon Apr 10, 2022
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