Error message appears in the output area on the right when it was no error

Attcahed animated gif shows a error message about syntax error appears on the right in the output area, in spite no error actually made, I just replaced “3” with “4”. It may be due to too little latency between a change is detected and python interpreter (or parser) is run after the detection.

The error message then suddenly disappears, thus it is more a user interface confusion problem.

Thanks for the feedback!

Actually, it is correct behaviour - error is displayed for the transitional state:

- * np.pi

Anyway we have some ideas on how to improve UX in such cases.