# Waiting in Python: wait(), communicate(), poll(), and the Deadlock Between Them

## Metadata

| Field | Value |
|---|---|
| Institute | Molodetz Institute — Research & Retrieval Division |
| Subject | async-pty-process-testing |
| Document type | Source Citation Card |
| Tier | 2 |
| Source title | Waiting in Python: wait(), communicate(), poll(), and the Deadlock Between Them |
| Source URL | https://www.runxbuild.com/blog/wait-command-python/ |
| 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 blog post specifically about the deadlock risks between `subprocess`'s `wait()`/`communicate()`/`poll()` methods — a topic adjacent to, but not individually opened/quoted for, the Tier 1 findings on that risk in `python-docs-asyncio-subprocess.md`.

## Changelog

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