# Running Python code in a subprocess with a time limit — Simon Willison's TIL

## Metadata

| Field | Value |
|---|---|
| Institute | Molodetz Institute — Research & Retrieval Division |
| Subject | async-pty-process-testing |
| Document type | Source Citation Card |
| Tier | 2 |
| Source title | Running Python code in a subprocess with a time limit |
| Source URL | https://til.simonwillison.net/python/subprocess-time-limit |
| Source type | blog post |
| Date researched | 2026-10-09 |
| Researched by | tai (agent), model: Claude Sonnet 5, on behalf of retoor |
| Research method | Search aggregator result listing (not independently opened or quoted) |
| Confidence | Not independently verified |
| Status | Active |

## Why it's here

Surfaced by the "asyncio subprocess timeout kill process group" search query as a "today I learned" note on enforcing a subprocess time limit; not individually opened or quoted during this research pass.

## Changelog

| Date | Change |
|---|---|
| 2026-10-09 | Logged as consulted-but-not-analyzed. |