Changes by Donovan Preston (and a few minor ones by me) to make IDE run under
MachoPython. Mainly making sure we don't call routines that don't exist
and representing pathnames in a os.separator-neutral format.

These shouldn't interfere too much with Just's work on the next generation IDE,
I hope.
diff --git a/Mac/Tools/IDE/PyEdit.py b/Mac/Tools/IDE/PyEdit.py
index 828b697..2117fc4 100644
--- a/Mac/Tools/IDE/PyEdit.py
+++ b/Mac/Tools/IDE/PyEdit.py
@@ -1128,7 +1128,8 @@
 			else:
 				PyDebugger.startfromhere()
 		elif not haveThreading:
-			MacOS.EnableAppswitch(0)
+			if hasattr(MacOS, 'EnableAppswitch'):
+				MacOS.EnableAppswitch(0)
 		try:
 			if profiling:
 				import profile, ProfileBrowser
@@ -1145,7 +1146,8 @@
 				exec code in globals, locals
 		finally:
 			if not haveThreading:
-				MacOS.EnableAppswitch(-1)
+				if hasattr(MacOS, 'EnableAppswitch'):
+					MacOS.EnableAppswitch(-1)
 	except W.AlertError, detail:
 		raise W.AlertError, detail
 	except (KeyboardInterrupt, BdbQuit):