Jupyter Notebook installed library;ModuleNotFoundError: No module named 'plotly' solution.

This kind of problem is generally because the library to be referenced has not been installed in advance. Record the steps to install the library.

1. First you need to find this folder:
   
   Looking for a way hhhh) I don't know if there are people like me who always forget where to install.
   Right-click the application to open the file location.

2. Output conda list to check if it has been installed
   

3. If not installed, enter pip install plotly