python-async

Guide correct asyncio patterns with httpx and concurrency primitives.

1|Updated Mar 30, 2026
One-click install
npx skills add https://github.com/anicdh/agstack --skill python-async-anicdh
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: python-async
Source: https://github.com/anicdh/agstack/tree/main/.claude/skills/python/python-async
Command: npx skills add https://github.com/anicdh/agstack --skill python-async-anicdh

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This section describes how to craft correct and efficient asynchronous Python code, helping developers avoid common pitfalls in asyncio, concurrency, and HTTP I/O.

Core Features & Use Cases

  • Async pattern guidance: correct use of async/await, asyncio.gather, and event loop management for concurrent I/O-bound tasks.
  • HTTP I/O with httpx: best practices for AsyncClient usage, timeouts, and error handling in async HTTP calls.
  • Robust error handling and timeouts: guidance to prevent hangs and to gracefully recover from failures in async workflows.
  • Gotchas & safe practices: warnings about forgetting await, mixing sync and async code, and common concurrency mistakes.

Quick Start

Run an asyncio-based script that fetches multiple URLs concurrently using httpx.

Frequently Asked Questions about python-async

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I fetch multiple URLs concurrently using httpx and asyncio?

To fetch multiple URLs concurrently, use asyncio.gather with an httpx.AsyncClient. This pattern manages concurrent I/O-bound HTTP requests safely, ensuring scalable async code execution across multiple endpoints.

What is the best way to prevent asyncio event loops from hanging?

The best way to prevent asyncio event loops from hanging is enforcing strict timeouts. Applying timeouts to async workflows ensures safe, scalable execution and graceful recovery from network or I/O failures.

Why does my async Python code run synchronously despite using async def?

Your async Python code runs synchronously because of common concurrency mistakes like forgetting await or mixing sync and async code. Correct use of await ensures proper event loop management for I/O-bound tasks.

Can I use httpx.AsyncClient for concurrent HTTP requests in Python?

Yes, you can use httpx.AsyncClient for concurrent HTTP requests. It provides best practices for async HTTP I/O, including proper timeout management and error handling within asyncio concurrency primitives.

What are common gotchas when building asyncio workflows?

Common asyncio gotchas include forgetting await statements, mixing synchronous and asynchronous code, and neglecting strict timeouts. Avoiding these mistakes ensures correct concurrency patterns and prevents unexpected workflow hangs.