Now IPython works with OS X 10.5 (Leopards) libedit based readline module.

IPython/rlineimpl.py

@@ -28,7 +28,20 b" if sys.platform == 'win32' and have_readline:"
     except AttributeError:
         print "Failed GetOutputFile"
         have_readline = False
-    
+
+# Test to see if libedit is being used instead of GNU readline.
+# Thanks to Boyd Waters for this patch.
+uses_libedit = False
+if sys.platform == 'darwin' and have_readline:
+	import commands
+	(status, result) = commands.getstatusoutput( "otool -L %s | grep libedit" % _rl.__file__ )
+	if status == 0 and len(result) > 0:
+		# we are bound to libedit - new in Leopard
+		_rl.parse_and_bind("bind ^I rl_complete")
+		print "Leopard libedit detected."
+		uses_libedit = True
+
+
 # the clear_history() function was only introduced in Python 2.4 and is
 # actually optional in the readline API, so we must explicitly check for its
 # existence.  Some known platforms actually don't have it.  This thread:

doc/ChangeLog

@@ -1,3 +1,8 b''
[phone]  Brian Granger <[e-mail]>
+
+	* iplib.py, rlineimpl.py: Applied Body Water's patches to get IPython
+	working with OS X 10.5 libedit implementation of readline.
+
 2007-10-24  Ville Vainio  <[e-mail]>
 
 	* iplib.py(user_setup): To route around buggy installations where