python安装更新报错ERROR: ERROR: Exception: Traceback (most recent call last):

pip 更新报错, 安装库报错

ERROR: ERROR: Exception: Traceback (most recent call last):
File "E:\python\lib\site-pac…
File "E:\python\lib\site-pac…
File "E:\python\lib\site-pac…
…
最后一行为:
ValueError: check_hostname requires server_hostname

解决办法:关闭
来自于 ： https://blog.csdn.net/u010037715/article/details/118277228

解决后
更新:

python -m pip  install --upgrade pip

安装:

pip install scikit-learn