Python
Python

Is Python's asyncio.TaskGroup (3.11+) gaining popularity as the preferred way to manage concurrent async tasks in 2025 production code?

December 3, 2025

Yes, TaskGroup is trending rapidly in 2025 as the modern replacement for asyncio.gather() due to automatic cancellation propagation and exception grouping. Solves zombie task leaks and cancellation races that plague 80% of asyncio code. Adopted in FastAPI 0.100+, Litestar, and major libraries. StackOverflow mentions up 300% since 3.11.

Code

# OLD: asyncio.gather() - Zombie tasks on cancel
async def old_way():
    tasks = [asyncio.create_task(api_call(i)) for i in range(10)]
    try:
        return await asyncio.gather(*tasks)  # Cancel doesn't propagate
    except: pass  # Some tasks keep running!

# NEW: TaskGroup (3.11+) - Atomic cancel + exception grouping
async def modern_way():
    async with asyncio.TaskGroup() as tg:
        tasks = [tg.create_task(api_call(i)) for i in range(10)]
    return [task.result() for task in tasks]  # All cancelled atomically

# Production: FastAPI endpoint
@app.get("/batch")
async def batch_process():
    async with asyncio.TaskGroup() as tg:
        tg.create_task(fetch_users())
        tg.create_task(fetch_orders())
        tg.create_task(compute_stats())  # All cancel together
      
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