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A number of functions that enhance IDLE on macOS.
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Initializes OS X Tk variant values for
isAquaTk(), isCarbonTk(), isCocoaTk(), and isXQuartz().
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Returns True if IDLE is using a native OS X Tk (Cocoa or Carbon).
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Returns True if IDLE is using a Carbon Aqua Tk (instead of the
newer Cocoa Aqua Tk).
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Returns True if IDLE is using a Cocoa Aqua Tk.
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Returns True if IDLE is using an OS X X11 Tk.
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Returns a string warning message if the Tk version in use appears to
be one known to cause problems with IDLE.
1. Apple Cocoa-based Tk 8.5.7 shipped with Mac OS X 10.6 is unusable.
2. Apple Cocoa-based Tk 8.5.9 in OS X 10.7 and 10.8 is better but
can still crash unexpectedly.
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patchlevel)z8.5.7z8.5.9FzWARNING: The version of Tcl/Tk ({0}) in use may be unstable.
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Fetch the macOS system preferences.
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Warn if "Prefer tabs when opening documents" is set to "Always".
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This ensures that the application will respond to open AppleEvents, which
makes is feasible to use IDLE as the default application for python files.
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z'addOpenEventSupport.