title: Jupyter Notebook: How to relaunch all cells above when a crash occurs?
body: <h3>Question 1:</h3>
  <p>I am using jupyter 4 with python and I would need my script to do a <strong>relaunch all the cells above</strong> when a crash occurs.</p>
  <p>Is this possible ?</p>
  <h3>Question 2:</h3>
  <p>If I need to relaunch all some cells, can I ask python to <strong>execute them according to some cell-id</strong>? I could then create a list of the cells id which have to be re-executed when catching an exception...</p>