jack liu

fix blocking issue when cell contains ipywidget

8

fix blocking issue when cell contains ipywidget

when cell contains ipywidget , execute cell will sometimes blocks

1

package version ``` nbformat 5.10.4 nbclient 0.10.0 ``` here is the code which can reproduce the bug ``` import nbformat from nbclient import NotebookClient def execute_ipynb(ipynb_file): with open(ipynb_file, 'r', encoding='utf-8')...

kernel can not start successful

1

as you can see , iopub_port is duplicated with comm_port port reason : select 5 kernel port is independent with select a random comm_port port