If you return to an unoccupied window, for example, for version 2.6, now you can change the background color from withe to another. But if you go to the options, you can change the background color of your text. Another thing you can do is use another gui for python, which may be more developed, like eclipse pydev, or use a text editor that you like, and configure it the way you want to write your scripts, and then run them in standby mode.
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