Automatic code completion jupyter

1.1 First installation  nbextensions

pip install jupyter_contrib_nbextensions

1.2 then set it

jupyter contrib nbextension install --user

2. Then install  nbextensions_configurator, likewise be provided

pip install jupyter_nbextensions_configurator
jupyter nbextensions_configurator enable --user

3. When performing error encountered 1.1: Error executing Jupyter command 'contrib': [Errno 'jupyter-contrib' not found] 2

C disk search jupyter-contrib-nbextension.exe, the path is switched to the path cmd the file is located, then execute the code on 1.1.