Announcing Tornado 6.1 beta 1

[Ben Darnell]

I'm pleased to announce the first beta release of Tornado 6.1. This release improves compatibility with the windows proactor event loop and updates the build process to provide binary wheels on macOS and Linux.

Draft release notes are available at https://www.tornadoweb.org/en/latest/releases/v6.1.0.html

To install, run `pip install --pre tornado==6.1.0b1`

Please let me know if you have any feedback on this release. I plan to release the final version of Tornado 6.1 shortly after Python 3.9 is released (scheduled for next week).

Thanks,

-Ben

[Ben Darnell]

The release of Python 3.9 changed some things, requiring a rework of some of the new Windows compatibility code, so I'm doing one more beta release. There are two changes since the first beta: a change to `@gen.coroutine` to better support the Python 3.7 contextvars module, and a Windows-only change to some threading code. I'd especially encourage Windows users to give this beta a try. I'm now planning the final release for next Friday.

To install this version, run `pip install --pre tornado==6.1b2`.

Release notes are still at https://www.tornadoweb.org/en/latest/releases/v6.1.0.html

-Ben