Jupyter notebook cannot run -- solution

The first opening is as follows

 This is because there is no default browser, just copy the online dating link in the picture and open it in the browser.

The second type of program reports an error when running, cannot run, and does not display the result

This is because the version of pyzmq is too high, just lower the version (generally, there may be problems with versions above 20)

win+r enter cmd to enter this interface

 Enter the following code to update the version of pyzmq

pip --default-timeout=5000 install -i https://pypi.tuna.tsinghua.edu.cn/simple  pyzmq==19.0.2

It should be noted here that if you want to update pyzmq in the pytorch environment, you need to activate the environment first

activate pytorch (environment name)