Summarize the following:
Find the Python file that you want to open in Command Prompt. If you already know the folder path to the Python file you want to open, skip ahead to opening the file in Command Prompt. Click once the Python file for which you want to see the folder path. Doing so prompts a drop-down menu to appear. It's in the drop-down menu. The properties window will open. The folder address (or "path") to the right of the "Location" heading is what you'll need to enter into Command Prompt when switching to the directory in which your Python file is stored. You can copy the location by highlighting it (click and drag your mouse across the "Location" value) and then pressing Ctrl+C.

Summary:
Go to the Python file's location. Select the Python file. Right-click the Python file. Click Properties. Note the "Location" value.