解决Jupyter command `jupyter-contrib` not found. 问题，pip uninstall jupyter_contrib_nbextensionspip uninstall jupyter_nbextensions_configurator2.重新下载并安装：2.1 先cmd命令安装pip install -i http://pypi.douban.com/simple --trusted-host pypi.douban.com jupyter_contrib_nbextensions2.2 然后cmd进入目录C:\Users\he\Python\Python38\Lib\site-packages\jupyter_contrib_nbextensions2.3 cmd执行下面命令手动安装python application.py install2.4 然后安装jupyter contrib-nbextension install --user这时就不会提示“Jupyter command jupyter-contrib not found.”这个问题了3 接下来继续安装pip install -i http://pypi.douban.com/simple --trusted-host pypi.douban.com jupyter_nbextensions_configuratorjupyter nbextensions_configurator enable --user这时从新启动jupyter notebook 就成功看到工具Nbextensions在工具栏了原文链接:https://blog.csdn.net/duqiumail/article/details/107650058