C:\Users>py --list
Installed Pythons found by py Launcher for Windows
 -3.8-64 *
 -3.6-64
 -2.7-64

C:\Users>py --list-paths
Installed Pythons found by py Launcher for Windows
 -3.8-64        C:\Users\username\AppData\Local\Programs\Python\Python38\python.exe *
 -3.6-64        C:\Users\username\AppData\Local\Programs\Python\Python36\python.exe
 -2.7-64        C:\Python27\python.exe

#Version 3.Install sklearn on 6 Python
py -3.6 -m pip install sklearn
#When the version is specified
py -3.6 -m pip install sklearn==0.22

#* When uninstalling
py -3.6 -m pip uninstall sklearn

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