[python] Fix Python preprocess handling for numeric YAML scalars

[Copilot]

The Python client preprocessor could crash when TypeSpec union enum values emitted numeric YAML scalars, e.g. date-like backtick labels. Numeric descriptions hit rstrip, and numeric enum value names hit snake-case conversion.

• Preprocess normalization

  • Convert description scalars to strings before trimming/appending punctuation.
  • Convert type and enum value names to strings before reserved-word and casing logic.

• Regression coverage

  • Added unit coverage for non-string descriptions.
  • Added unit coverage for numeric enum value names in both top-level and nested enum preprocessing.

union ApiVersion {
  string;
  `2020-01-01`: "2020-01-01";
}

This now preprocesses without raising AttributeError or TypeError from Python string helpers.

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@typespec/http-client-python@11143

commit: 87c8a19

[github-actions]

All changed packages have been documented.

• ✅ @typespec/http-client-python

Show changes

@typespec/http-client-python - fix ✏️

Handle non-string YAML descriptions during Python client preprocessing.

[azure-sdk-automation]

You can try these changes here

🛝 Playground	🌐 Website	🛝 VSCode Extension

[msyyc]

move to #11162