Fix Python PATH Errors: Step‑by‑Step Guide to Setting the Environment Variable
This article provides a detailed, illustrated tutorial on how to locate your Python installation directory on Windows, add it to the system PATH environment variable, and verify the configuration so you can run Python from any command prompt.
Step‑by‑Step Guide to Setting the Python Environment Variable on Windows
Confirm that Python is installed and note the installation folder (e.g., C:\Python27).
Copy the full path of the Python folder. Use the address bar to select the path and press Ctrl+C.
On the desktop, right‑click “My Computer” (or “This PC”) and choose **Properties**.
In the System window click **Advanced system settings** on the left.
In the **System Properties** dialog, go to the **Advanced** tab and click **Environment Variables**.
In the **System variables** list select **Path** and click **Edit**.
At the end of the **Variable value** field add a semicolon (;) followed by the copied Python path (e.g., ;C:\Python27) and click **OK**.
Close all dialogs, open a new Command Prompt, and type python. The interpreter should start, confirming the PATH is set correctly.
After completing these steps, you can run Python from any command line without further configuration.
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