Deprecation warning from Jupyter: “`should_run_async` will not call `transform_cell` automatically in the future”

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Upgrading ipykernel 5.3.4 seems to have fixed it for me.

pip install --upgrade ipykernel

Make sure to restart your Juptyer server afterwards.

I came up with this by inserting a breakpoint() at /ipkernel.py:287 and using w to see what was making the call. If this fix doesn’t work for you, worth checking what’s making the call in your case.

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