PyO3 / PyO3/pyo3

Populate `am_send` slot

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Dominant language
Rust
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Forks
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Avg merge
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Merged PRs (30d)
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Description

With the introduction of eager_task_factory in Python 3.12, I think it would be a good idea to start looking at populating the am_send slot whenever users implement the send() method.

But since this is a feature that is only available on Python 3.10+, we might have to gate it behind an attribute argument like so.

#[cfg_attr(Py_3_10, pyclass(fast_send))]
#[cfg_attr(not(Py_3_10), pyclass)]
struct Coroutine {
    ...
}

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Research direction

Start by reviewing the PyO3 implementation of Python async types and the Python C API documentation for the am_send slot and eager_task_factory. Determine how user-defined send() methods should populate the slot, including the proposed Python-version gating; done means the behavior works on supported versions and remains compatible with older Python versions.

Written by the indexing model from the issue text.

Assessment

Tech stack
python, rust
Domain
api
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
50/100

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