- Update to version 0.20.0
* You can now conveniently spawn a child process in a background
task and interact it with on the fly using process = await
nursery.start(run_process, ...). See run_process for more
details. We recommend most users switch to this new API. Also
note that:
- trio.open_process has been deprecated in favor of
trio.lowlevel.open_process,
- The aclose method on Process has been deprecated along with
async with process_obj. (#1104)
* Now context variables set with contextvars are preserved when
running functions in a worker thread with
trio.to_thread.run_sync, or when running functions from the
worker thread in the parent Trio thread with
trio.from_thread.run, and trio.from_thread.run_sync. This is
done by automatically copying the contextvars context.
trio.lowlevel.spawn_system_task now also receives an optional
context argument. (#2160)
* Trio now avoids creating cyclic garbage when a MultiError is
generated and filtered, including invisibly within the
cancellation system. This means errors raised through nurseries
and cancel scopes should result in less GC latency. (#2063)
* Trio now deterministically cleans up file descriptors that were
opened before subprocess creation fails. Previously, they would
remain open until the next run of the garbage collector.
(#2193)
* Add compatibility with OpenSSL 3.0 on newer Python and PyPy
versions by working around SSLEOFError not being raised
properly. (#2203)
* Fix a bug that could cause Process.wait to hang on Linux