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Eddie

"Eddie is a programmers editor for MacOSX and Gnome Linux. Inspired by the Macintosh Programmers Workshop, Eddie brings some of it's powerful features into a modern lightweight and capable programmer's editor. Eddie is ideal for C/C++ development using makefiles and shell tools but can also be used with XCode projects. The Worksheet in Eddie is a full-featured shell that combines the power of bash and the ease of editing in a normal text window-like mode. Eddie is equally capable at editing HTML, JavaScript, Python, Ruby, Lua and many other languages.
Originally written for BeOS, it is currently actively developed for MacOSX and Gnome Linux."

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A note on Python's __exit__() and errors

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