Why do I get an 'Unhandled exception in event loop' error on ipython

Question

I started using ipython recently. Now I often get this message upon doing any action, even simple ones like defining variables:

>>> num = 1

Unhandl         


        

Answer 1

I managed to solve the problem. There is some incompatibility between the ipython v7.10.2 and prompt toolkit v3.x. However, everything works fine when downgrading to prompt toolkit v2.x:

python -m pip install -U prompt-toolkit~=2.0

I was advised to do so by the ipython staff at github (so credit to them).