Jupyter Coursera

i have problem, when i make code in jupyter coursera eror, how to reset it ?

If you would like to get a clean copy of any one of the notebooks and start over, there is a topic about that on the FAQ Thread.

But if I am simply missing your point, please clarify. Also note that you posted this under DLS Course 3, but there are no programming assignments (and hence no Jupyter Notebooks) in Course 3.