Update async features examples for Python 3.14 - #798
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Refresh the code for the "Getting Started With Async Features in Python" tutorial update. - Replace the `done`-flag loops with `while tasks:`, and iterate over a copy so removing an exhausted generator can't skip a task - Switch `asyncio.gather()` to `async with asyncio.TaskGroup()` in examples 4 and 6 (Python 3.11+) - Guard each HTTP request in example 6 with `asyncio.timeout(10)` - Rename the `queue` parameter to `work_queue` so it stops shadowing the `queue` module - Drop the stray `from builtins import range` in example 2 - Move the URL lists to https and replace the dead entries (twitter.com now redirects to x.com, yahoo.com returns 404) - Refresh requirements.txt to current releases and drop the transitive pins All six examples verified on Python 3.14.6. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Refreshes the sample code for understanding-asynchronous-programming, which backs Getting Started With Async Features in Python. Paired with the light update on that tutorial (CMS clone: post 2283).
The repo copy had drifted further than the article itself — it still pinned
aiohttp==3.5.4andrequests==2.21.0from 2019.Changes
while tasks:instead of thedoneflag (examples 2, 3, 5). This came from a reader suggestion, and it also fixes a latent bug: the old loop removed items fromtaskswhile iterating over it, which can skip a task. The loop now iterates overtasks.copy().asyncio.gather()→async with asyncio.TaskGroup()(examples 4 and 6). Task groups are the recommended default since Python 3.11 and cancel remaining tasks when one fails.asyncio.timeout(10)around the HTTP request in example 6, so an unresponsive server can't stall a task indefinitely.queueparameter towork_queuein examples 2 and 3, where it was shadowing thequeuemodule.from builtins import rangein example 2 (an IDE artifact — it's a no-op on Python 3).https://, with the dead entries replaced.twitter.comnow redirects tox.com, andyahoo.comreturns 404 over https, so it was dropped.requirements.txtrefreshed to current releases, keeping only the three direct dependencies rather than the full frozen transitive set.Verification
All six examples were run on Python 3.14.6:
example_1.pyexample_2.pyexample_3.pyexample_4.pyexample_5.pyexample_6.pyExamples 5 and 6 hit the live network, so their timings vary between runs. The async version stays roughly twice as fast as the sync one, which is the point the tutorial makes.
The code here is semantically identical to the code blocks in the updated article, with this repo's PEP 8 blank-line formatting preserved.
🤖 Generated with Claude Code