无法下载pip install jupyter_contrib_nbextensions
在各个浏览器搜索了 可能输入过长 一直有找到解决方法
cmd内使用pip install jupyter_contrib_nbextensions
一直失败
ERROR: Could not find a version that satisfies the requirement jupyter_contrib_nbextensions (from versi
ons: none)
ERROR: No matching distribution found for jupyter_contrib_nbextensions