Setting environment changes?

Question

I would like to ask you if it's normal that my "Setting environment" changes after each system reboot or even if I just close my cmd console.

for example, I'm using python 3.5, when I wan to use python or to uses pip under the cmd I got an error like :

C:\>python 'python' is not recognized as an internal or external command, operable program or batch file.

To fix this, I use :

set PATH=%PATH%;C:\Python35

It works after, but as I said before, once I restart my computer, or I close the console, I've the same problem !!!

Thanks in advance for your help and comments. I just would like to inform you that I'm using Windows 7 - 64bits.

peter · Accepted Answer · 2016-04-15 13:45:44Z

You need to add this path in System (Windows+Pause key), Advanced, Environment variables. There you have two sections, System and User, in System, edit the PATH key. The next time you start a console the path will be present.

Alternaly, if you don't want to modify the setting there (or you have no rights) you could start the app with a batch file which sets the path before launching the app.

In Ruby you can adapt the environment variables from within the script itself by using ENV eg ENV['path'] += 'C:\\Python35' , I'm sure Python can do this too but wouldn't know how. In your use case this won't help of course.

Thank you so much for your answer, actually I completely forget to add the path to the system section.
It's something the python installer should take care of, at least in a MS Windows philosophy. You are welcome

Community · Accepted Answer · 2017-05-23 11:50:42Z

The SETX command will set the variable permanently. Use SETX /? for information. Set a persistent environment variable from cmd.exe

For Python, many developers use venv which is included with the Python install. https://docs.python.org/3/library/venv.html?highlight=venv#module-venv

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