WARNING: You are using pip version 19.3.1; however version 20.0.2 is available.

执行下面两个命令都不行。 python -m pip install –upgrade pip python3 -m pip install pip==20.0.2 使用国内下载源(成功): C:\WINDOWS\system32>pip –version pip 19.3.1 from c:\users\yanghang\appdata\local\programs\python\python37\lib\site-packages\pip (python 3.7) C:\WINDOWS\system32>python -m pip install –upgrade pip -i http