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Use exact per-file environments for Python files (PEP 723 PR 19) #26129

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Merged
Stella Huang (StellaHuang95) merged 3 commits into from
Aug 31, 2026
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Merged

Use exact per-file environments for Python files (PEP 723 PR 19) #26129

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e413c74
Use exact per-file environments for Python files
StellaHuang95 Aug 28, 2026
64b462d
Document per-file interpreter resolution in the config middleware
StellaHuang95 Aug 29, 2026
67eef40
Gate debug per-file interpreter resolution behind useEnvExtension()
StellaHuang95 Aug 29, 2026
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Document per-file interpreter resolution in the config middleware 
Clarify why the workspace/configuration handler resolves the interpreter for the exact .py file (exactResource) rather than its folder: it honors a per-file environment such as a PEP 723 inline-script env for the language client this extension hosts, and only diverges from folder resolution when the Python Environments extension is in use.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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@StellaHuang95
StellaHuang95 and Copilot committed Aug 31, 2026
commit 64b462d2b92d28ada652fcd98540b692a595589b
5 changes: 5 additions & 0 deletions src/client/activation/languageClientMiddlewareBase.ts
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Expand Up @@ -87,6 +87,11 @@ export class LanguageClientMiddlewareBase implements Middleware {
const settingDict: LSPObject & { pythonPath: string; _envPYTHONPATH: string } = settings[
i
] as LSPObject & { pythonPath: string; _envPYTHONPATH: string };
// For a .py file resource, resolve the interpreter for that exact file rather than its
// containing workspace folder, so a per-file environment (such as a PEP 723 inline-script
// environment created for a single script) is honored for the language client hosted by
// this extension. This only diverges from workspace-folder resolution when the Python
// Environments extension is in use; otherwise getActiveInterpreter ignores exactResource.
const exactResource = uri && path.extname(uri.fsPath).toLowerCase() === '.py';
settingDict.pythonPath =
(
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