How to Run Python 2.7 From Notepad

1). Download and install Python from python.org/download/releases/2.7. Select the most current version appropriate for your system -- version 2.7.2 as of this writing -- and click the download link. Double-click the downloaded .msi file and follow the on-screen instructions to install Python on your system.
2). Open Notepad by selecting "Programs," "Accessories" and "Notepad" from your "Start" menu.
3). Write a simple Python script using Notepad as a simple text editor. As an example:

for x in range(5):

print x

This script prints the integers from zero to 4 in a command prompt window. Save the script to your desktop as "count.py."
4). Open a command prompt by selecting "Programs," "Accessories" and "Command Prompt" from your "Start" menu.
5). Type "cd Desktop" to navigate to your Desktop folder.
6). Type "python count.py" to run the Python script you just created.