I get the following error when trying to run jupyter notebook. It is a fresh install of python and jupyter notebook.

CodePudding user response：

The file nbjson.py is trying to import the function encodestring() from base64. That function has been deprecated since Python 3.1 (2009) and was removed in Python 3.9. The Python 3 name for the function is encodebytes().

Unless you feel up to remediating legacy code in a 3rd-party module (something I would hesitate to recommend), your options are (1) report the problem to the nbjson maintainer or (2) install Python 3.8 alongside Python 3.9 for this project.