'python3' is not recognized as an internal or external command, operable program or batch file

Question

I am using Python 3.5.2 version on Windows 7 and tried using python3 app.py. I am getting this error message:

\'python3\' is not recognized as an         


        

Answer 1

Python3.exe is not defined in windows

Specify the path for required version of python when you need to used it by creating virtual environment for your project

Python 3

virtualenv --python=C:\PATH_TO_PYTHON\python.exe environment

Python2

virtualenv --python=C:\PATH_TO_PYTHON\python.exe environment

then activate the environment using

.\environment\Scripts\activate.ps1