KernelManager's last_activity attribute is added following the instance's
creation. Culling (independently) uses this attribute and should ensure
it exists prior to its use, else skip the culling check for that instance.
Fixes#5345
This commit uses the approach used in jupyter_server #191 first proposed
by David Brochart. This reduces code duplication and alleviates redundancy
relative to configurable options.
Also, the startup message now includes the version information.
Co-authored-by: David Brochart <david.brochart@gmail.com>
- start asyncio loop explicitly in notebook thread (tornado 4 starts per-thread loops automatically, asyncio doesn’t)
- remove unsupported ‘io_loop=‘ arg in websocket test
application runs fine with tornado 5, just a few test bits needed updating
Zachary Sailer
Kevin Bates
Sylvain Corlay
Min RK