%macro w/o args returns list of available macros

IPython/Magic.py

@@ -1,7 +1,7 b''
 # -*- coding: utf-8 -*-
 """Magic functions for InteractiveShell.
 
-$Id: Magic.py 2569 2007-07-31 19:48:00Z fperez $"""
+$Id: Magic.py 2592 2007-08-07 13:30:56Z vivainio $"""
 
 #*****************************************************************************
 #       Copyright (C) 2001 Janko Hauser <[e-mail]> and
@@ -1754,6 +1754,8 b' Currently the magic system has the following functions:\\n"""'
           In [60]: exec In[44:48]+In[49]"""
 
         opts,args = self.parse_options(parameter_s,'r',mode='list')
+        if not args:
+            return [k for k,v in self.shell.user_ns.items() if isinstance(v, Macro)]
         name,ranges = args[0], args[1:]
         #print 'rng',ranges  # dbg
         lines = self.extract_input_slices(ranges,opts.has_key('r'))