Python Launcher

Python Launcher is an open-source program that allows Python scripts (.py and .pyw files) on Windows to specify the version of Python which should be used, allowing simultaneous use of Python 2 and 3. When executing a script, the launcher looks for a Unix-style #!

(shebang) line in the script. It recognizes executable names python (system default python), python2 (default Python 2 release) and python3 (default Python 3 release).