How to Resolve the \"python\' is not recognized\" Error in Windows 7 Command Prompt?

Running Python Programs in Command Prompt on Windows 7

For users unfamiliar with executing Python programs directly from the Command Prompt in Windows 7, it can be perplexing. Here's a step-by-step guide to resolve the error encountered:

Understanding the Error

When the error message "python' is not recognized" appears, it indicates that the Command Prompt cannot locate the python executable. The missing AUTOEXEC.BAT file is a legacy path modification method from older Windows versions.

Setting the PATH Variable

To resolve the issue, you need to define the system PATH variable with the path to the Python installation directory. Follow these steps:

1. Navigate to System Properties (Computer -> System Properties or Win Break).
2. Select Advanced System Settings under the Advanced tab.
3. Click the Environment Variables button.
4. In the System Variables section, locate the PATH variable.
5. Append the path to your Python installation (e.g., ;C:Python27) to the end of the variable value and ensure it's separated by a semicolon (;).

Note: Modifying the PATH variable impacts only newly opened Command Prompt instances.

Verification

Once the PATH variable is updated, open a new Command Prompt window and execute the following:

python

If configured correctly, the Command Prompt will display Python's interactive prompt (>>>).

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