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Incorrectly formatted error message in asyncio.proactor_events.sendto() #160596

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Incorrectly formatted error message in asyncio.proactor_events.sendto()#160596
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stdlibStandard Library Python modules in the Lib/ directorytopic-asynciotype-bugAn unexpected behavior, bug, or error

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@aisk
aisk
opened on Oct 24, 2026

Bug report

It should use % instead of ,, and the wording could also be adjusted.

cpython/Lib/asyncio/proactor_events.py

Lines 492 to 493 in b577a54

raise TypeError('data argument must be bytes-like object (%r)',
type(data))

I'm working on a PR to fix this.

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

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  1. aisk
    added
    type-bugAn unexpected behavior, bug, or error
    on Oct 24, 2026
  2. NekoAsakura
    added
    topic-asyncio
    stdlibStandard Library Python modules in the Lib/ directory
    on Oct 24, 2026
  3. github-project-automation
    added this to asyncioon Oct 24, 2026
  4. github-project-automation
    moved this to Todo in asyncioon Oct 24, 2026
  5. kumaraditya303
    added a commit that references this issue on Oct 24, 2026

    gh-160596: Fix error message in asyncio.proactor_events.sendto() (#16…

    1159836
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    stdlibStandard Library Python modules in the Lib/ directorytopic-asynciotype-bugAn unexpected behavior, bug, or error

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