@asyncio.coroutine removal as of python 3.11

[cardinalgeo]

Describe the bug

When running the "RemoteSelection" example here in the trame repo, I receive the following error:

According to here in the asyncio documentation, as of python 3.11 (Oct. 24th, 2022), @asyncio.coroutine has been removed and async def should be used instead. Expectedly, reverting to python 3.10 resolves this issue.

While I looked into making a pull request myself, I have no experience with asyncio, let alone the general asynchronous programming model.

To Reproduce

Steps to reproduce the behavior:

1. python examples/06_vtk/Applications/RemoteSelection/app.py
2. See error

Expected behavior

As shown in the trame promotional video here (00:51), we expect cross-selection of points between the vtk scene and the plotly scatter plot, where selection of points on one results in highlight in the other. However, this cross-selection capability is not present. Otherwise, the dashboard appears functional.

Platform:

Trame:

• Version 1.x
• Version 2.x

Device:

• Desktop
• Mobile

OS:

• Windows
• MacOS
• Linux
• Android
• iOS

Browsers Affected:

• Chrome
• Firefox
• Microsoft Edge
• Safari
• Opera
• Brave
• IE 11

[jourdain]

Thanks for pointing that out.

[cardinalgeo]

No problem!