Description

nascheme

opened on Jan 6, 2025

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Feature or enhancement

Proposal:

It would be convenient and likely less surprising if threads inherited the context of their creator, rather than starting with an empty context. This would match what asynio.Task does. This has been requested before, as gh-86981.

Has this already been discussed elsewhere?

I have already discussed this feature proposal on Discourse

Links to previous discussion of this feature:

https://discuss.python.org/t/thread-safe-warning-filters/

Linked PRs

• gh-128555: Add 'context' keyword parameter to Thread. #128209

Reacted by Stan Svec, Raphaël Cohen, Hugo Elias Berg and Nikita Reznikov

Activity

1. nascheme

   added

   type-featureA feature request or enhancementA feature request or enhancement

   on Jan 6, 2025
2. picnixz

   added

   interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

   extension-modulesC modules in the Modules dirC modules in the Modules dir

   on Jan 6, 2025
3. rhettinger commented on Jan 8, 2025

   

   rhettinger

   on Jan 8, 2025

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   It would be convenient and likely less surprising if threads inherited the context of their creator, rather than starting with an empty context.

   My mental model for context vars is that they operate similarly to thread.local() and that it would be surprising if they didn't.

   Reacted by Robert Schmidtke
4. StanSvec commented on Jan 9, 2025

   

   StanSvec

   on Jan 9, 2025

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   +1 on this idea. When a parent task needs to split work into concurrent subtasks, having access to the same context just makes sense. I can't see any real downsides to doing this, but I can think of many cases where inherited context would be helpful.
5. kumaraditya303 commented on Jul 18, 2025

   

   kumaraditya303

   on Jul 18, 2025

   Contributor

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   This is now implemented as thread_inherit_context flag.
6. kumaraditya303

   closed this as completedon Jul 18, 2025

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