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/PyDebugger.py b/Mac/Tools/IDE/PyDebugger.py
index 4bbac26..74bfc74 100644
--- a/Mac/Tools/IDE/PyDebugger.py
+++ b/Mac/Tools/IDE/PyDebugger.py
@@ -496,7 +496,8 @@
 			self.w.panes.bottom.tracingmonitor.toggle()
 		try:
 			try:
-				MacOS.EnableAppswitch(0)
+				if hasattr(MacOS, 'EnableAppswitch'):
+					MacOS.EnableAppswitch(0)
 				if self.quitting:
 					# returning None is not enough, a former BdbQuit exception
 					# might have been eaten by the print statement
@@ -512,7 +513,8 @@
 				print 'bdb.Bdb.dispatch: unknown debugging event:', `event`
 				return self.trace_dispatch
 			finally:
-				MacOS.EnableAppswitch(-1)
+				if hasattr(MacOS, 'EnableAppswitch'):
+					MacOS.EnableAppswitch(-1)
 		except KeyboardInterrupt:
 			self.set_step()
 			return self.trace_dispatch