[Libba Lawrence (l0lawrence)]

The Python emitter's post-generation steps currently scan the output directory, formatting and adding pylint suppression comments to pre-existing tests, samples, and other user-managed Python files. This change limits those steps to files written during the current generation.

Approach

• Record successful writes at the serializer's shared writer layer using normalized absolute paths. Reset tracking on each generation so empty runs and reruns cannot fall back to processing stale files.
• Use one Python pipeline for native and Pyodide generation, explicitly passing recorded paths to Black formatting and suppression insertion. Batch workers return their paths to the parent for post-processing.
• Preserve regenerated SDK files, packaging files, generated tests/samples, namespace layouts, and paths outside the immediate generation directory. No public emitter option is added.

This post-generation step does not invoke pylint; it inserts suppression comments where necessary. The standalone pygen.black command now requires explicit filenames. Suppression insertion also preserves stable line endings when extending an existing header.

Validation

• 63 focused Python regression and adjacent unit tests passed, including byte-for-byte preservation of BOM/CRLF user files, regeneration, empty file sets, threshold boundaries, generated test/sample gating, namespace layouts, the native entry point, and real batch multiprocessing.
• All 26 emitter tests passed, including native and Node/browser Pyodide routing regressions. Pyodide runtime objects are mocked; the shared Python pipeline is exercised with CPython, not live WASM.
• TypeScript compilation and generator wheel build passed. Package formatting and emitter lint passed; targeted Python lint, type checks, and whitespace checks passed.

Includes a fix changelog entry and documentation describing the post-processing scope.

Fixes: #11424

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@typespec/http-client-python@12114

commit: ea6de3f

[azure-sdk-automation]

You can try these changes here

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[github-actions]

All changed packages have been documented.

• ✅ @typespec/http-client-python

Show changes

@typespec/http-client-python - fix ✏️

Limit Black formatting and pylint suppression insertion to Python files written during the current generation, leaving pre-existing user-managed tests, samples, and other Python files unchanged.

[github-actions]

Python emitter diff

Baseline gh:be4c4b7f5646d7eea4affd972d5f69de6c21fdd1 vs this PR.

Diff summary: 1 file(s), +1 / -1

Rendered diff: inline on the run summary, or the emitter-diff-html artifact.

Informational check (eng/emitter-diff); does not block the PR.

[microsoft-github-policy-service]

Hi @Libba Lawrence (@l0lawrence). Your PR has had no update for 14 days and it is marked as a stale PR. If it is not updated within 14 additional days, the PR will automatically be closed. The stale label is removed automatically when you update or comment on your PR, or when a maintainer reviews it. You can also remove the label manually.

[microsoft-github-policy-service]

Hi @Libba Lawrence (@l0lawrence). The PR will be closed since the PR has no update for 28 days. If this is still relevant please reopen.