Quote:I don't have enough authority to open the environment variable, much less to set it.
Is this even your own machine? Are you using school/college/university machines to do this, or even a corporate machine? If so, you should ask your system admin to add the variables to your machine so that you can work properly.
Quote:The computer already installed the python and notepad++, and I know the path of python, like C://program files/python3.8
Then you can use the path and execute the Python binary, like this,
cmd> C:\Program Files\Python3.8\python.exe mypython.py
This will execute that Python file for you. You can store this as a Windows Batch file (.bat) and run it each time you want to execute the file.
I would again recommend, that you ask system administrator to do this for you. And yes, consider using an IDE when you can, Python in Visual Studio Code