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Installing Python on Windows

This guide will help Windows users install Python on their system. Users of other operating system likely have Python built-in.

Check if Python is already installed

To check if Python is already installed, go the the Start menu, then examine the list of "All Programs".

If Python 2.5 or Python 2.6 exists there, then skip to the section below entitled "Set your PATH environment variable".

If you find a different version of Python there, or do not see Python at all, then proceed to "Download and Install Python 2.6" below.

Download and Install Python 2.6

Set your PATH environment variable

To tell your computer where to find Python, you change your PATH environment variable:

  • Step 1: From the Control Panel, open the System settings panel. Within System settings, select the "Advanced" tab, then click on the "Environment Variables" button.
  • Step 2: Under the section titled "System variables", find the line with "PATH" in the "Variable" column and click "Edit".
    • If you are unable to edit the system-wide "PATH", find the section titled "user variables" and click "New". Name the new variable "PATH" (in all capital letters) and keep this window open.
  • Step 3: Under "Variable value", add a semicolon to the end of the entry there, then add the full path to the Python folder you installed. For most installations, the folder should be named C:\Python26\
  • Step 4: Click "OK".

You're done!

You should now be able to run Python programs on you computer, including Seattle.