python / python/cpython

Provide triggering AttributeError exception to __getattr__ for reraising

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3.9 (EOL) interpreter-core type-feature
Dominant language
Python
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Description

BPO 37379
Nosy @stevendaprano, @serhiy-storchaka, @hernot
Files
  • test6.py: Example one function catching exception which is reraised by othe function called from within except branch
  • tes_attr1.py: Examples showing the problem and what would change.
  • 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 = None
    created_at = <Date 2019-06-23.13:59:44.812>
    labels = ['interpreter-core', 'type-feature', '3.9']
    title = 'Provide triggering AttributeError exception to __getattr__ for reraising'
    updated_at = <Date 2019-06-23.20:11:33.654>
    user = 'https://github.com/hernot'
    

    bugs.python.org fields:

    activity = <Date 2019-06-23.20:11:33.654>
    actor = 'serhiy.storchaka'
    assignee = 'none'
    closed = False
    closed_date = None
    closer = None
    components = ['Interpreter Core']
    creation = <Date 2019-06-23.13:59:44.812>
    creator = 'nother'
    dependencies = []
    files = ['48432', '48433']
    hgrepos = []
    issue_num = 37379
    keywords = []
    message_count = 4.0
    messages = ['346323', '346325', '346336', '346337']
    nosy_count = 3.0
    nosy_names = ['steven.daprano', 'serhiy.storchaka', 'nother']
    pr_nums = []
    priority = 'normal'
    resolution = None
    stage = None
    status = 'open'
    superseder = None
    type = 'enhancement'
    url = 'https://bugs.python.org/issue37379'
    versions = ['Python 3.9']
    

    Contributor guide

    Open the contributing guide

    First steps

    1. Read the whole issue, then the project's contributing guide.
    2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
    3. Fork the repository and make your change on a branch.
    4. Open a pull request that references the issue number.

    Research direction

    Start by reading the attached tes_attr1.py examples, then test6.py, to understand the reported getattr and reraising behavior. Trace the relevant CPython interpreter entry point for attribute lookup and determine the expected exception flow. Done means the triggering AttributeError is available to getattr and the attached reraising examples behave as intended, with regression coverage.

    Written by the indexing model from the issue text.

    Assessment

    Tech stack
    python
    Domain
    compilers
    Issue type
    Feature
    Difficulty
    5/5
    Estimated time
    Over a week
    Activity status
    Stale
    Clarity
    Mostly clear
    Newbie friendliness
    25/100

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