How to Fix \"python is not recognized\" Error in Windows 7 Command Prompt?

Running Python Programs in Windows 7 Command Prompt

When attempting to execute Python scripts using the Command Prompt in Windows 7, you may encounter an error indicating "python is not recognized." To resolve this issue, you need to incorporate the Python executable's path into the system's PATH environment variable.

Steps for Adding Python to Path in Windows 7 :

1. Navigate to Computer -> System Properties (or press Win Break) -> Advanced System Settings.
2. Click the Environment variables... button under the Advanced tab.
3. Locate the PATH variable in the System Variables section.
4. Append ;C:Python27 (substitute with your Python version) to the end of the PATH value.
5. Click OK to save the changes.

Note: Restarting Windows is not necessary after this modification. However, only Command Prompt instances launched after the change will have the updated PATH. To verify the updated PATH, type set PATH at the command prompt.

Now that Python is in the PATH, you can execute Python scripts from the Command Prompt by typing python .py, where .py represents the script's file name.

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