print floating point number

[snippsat]

Well, Windows has a PATH env. variable, right? So there is something called shortcuts, right?

The point @wavic is that Python 3.6  add to path automatically under installation. 
[Image: 4Qfi5o.jpg]
Then when use python my.py from command line it use 3.6 to run.
And pip command will install to 3.6

All other version can be run with py -version
py -3.4 my.py will run code in 3.4.
py -2.7 my.py will run code in 2.7.
py -3.4 -m pip install requests will install Requests to 3.4
This way it easy to access all version,and using python it will use 3.6 which should be main version on OS.