Ruth Chabay discovered that when using IDLE on Windows it is a good idea
always to start with a "save as" with a file name that has the .py
extension. If the file is saved without the .py extension, IDLE believes
the file is not a Python file and refuses to colorize the program. Our
students find the colorization quite useful and are disappointed when it
goes away, so it is good to know what the fix is.
Bruce Sherwood
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