I have recently installed both Python 2.7.1 and 2.6.5 versions on Windows. I have attached the path of Python 2.6.5 in the Environment Variables. I want to execute a Python script x.py in Python 2.6.5. When I am Edit with the IDLE option, but this starts and runs the script using Python 2.7.1. Is there a way to start and run it with Python 2.6.5?