result_display can return value. ipapi.is_ipython_session(). %paste -> %cpaste.

IPython/Magic.py

@@ -1,7 +1,7 b''
 # -*- coding: utf-8 -*-
 """Magic functions for InteractiveShell.
 
-$Id: Magic.py 1071 2006-01-23 21:30:41Z vivainio $"""
+$Id: Magic.py 1076 2006-01-24 17:27:05Z vivainio $"""
 
 #*****************************************************************************
 #       Copyright (C) 2001 Janko Hauser <[e-mail]> and
@@ -2760,7 +2760,7 b' Defaulting color scheme to \'NoColor\'"""'
         page(self.shell.pycolorize(file_read(filename)),
              screen_lines=self.shell.rc.screen_length)
 
-    def magic_paste(self, parameter_s=''):
+    def magic_cpaste(self, parameter_s=''):
         """Allows you to paste & execute a pre-formatted code block from 
         clipboard.
         
@@ -2772,7 +2772,7 b' Defaulting color scheme to \'NoColor\'"""'
         method definitions. The executed block is also assigned to variable 
         named 'pasted_block' for later editing with '%edit pasted_block'.
         
-        You can also pass a variable name as an argument, e.g. '%paste foo'.
+        You can also pass a variable name as an argument, e.g. '%cpaste foo'.
         This assigns the pasted block to variable 'foo' as string, without 
         dedenting or executing it.
         

IPython/Prompts.py

@@ -2,7 +2,7 b''
 """
 Classes for handling input/output prompts.
 
-$Id: Prompts.py 1020 2006-01-14 13:22:58Z vivainio $"""
+$Id: Prompts.py 1076 2006-01-24 17:27:05Z vivainio $"""
 
 #*****************************************************************************
 #       Copyright (C) 2001-2006 Fernando Perez <[e-mail]>
@@ -497,9 +497,7 b' class CachedOutput:'
         if arg is not None:
             cout_write = Term.cout.write # fast lookup
             # first handle the cache and counters
-            # but avoid recursive reference when displaying _oh/Out
-            if arg is not self.user_ns['_oh']:
-                self.update(arg)
+
             # do not print output if input ends in ';'
             if self.input_hist[self.prompt_count].endswith(';\n'):
                 return
@@ -516,7 +514,18 b' class CachedOutput:'
                 return None
 
             # and now call a possibly user-defined print mechanism
-            self.display(arg)
+            manipulated_val = self.display(arg)
+            
+            # user display hooks can change the variable to be stored in
+            # output history
+            
+            if manipulated_val is not None:
+                arg = manipulated_val
+                
+            # avoid recursive reference when displaying _oh/Out
+            if arg is not self.user_ns['_oh']:
+                self.update(arg)
+
             if self.logger.log_output:
                 self.logger.log_write(repr(arg),'output')
             cout_write(self.output_sep2)
@@ -529,7 +538,7 b' class CachedOutput:'
         display, e.g. when your own objects need special formatting.
         """
 
-        self.shell.hooks.result_display(arg)
+        return self.shell.hooks.result_display(arg)
 
     # Assign the default display method:
     display = _display

IPython/hooks.py

@@ -32,7 +32,7 b" ip_set_hook('editor',myiphooks.calljed)"
 The ip_set_hook function is put by IPython into the builtin namespace, so it
 is always available from all running code.
 
-$Id: hooks.py 1020 2006-01-14 13:22:58Z vivainio $"""
+$Id: hooks.py 1076 2006-01-24 17:27:05Z vivainio $"""
 
 #*****************************************************************************
 #       Copyright (C) 2005 Fernando Perez. <[e-mail]>
@@ -42,6 +42,7 b' $Id: hooks.py 1020 2006-01-14 13:22:58Z vivainio $"""'
 #*****************************************************************************
 
 from IPython import Release
+from IPython import ipapi
 __author__  = '%s <%s>' % Release.authors['Fernando']
 __license__ = Release.license
 __version__ = Release.version
@@ -96,8 +97,6 b' def fix_error_editor(self,filename,linenum,column,msg):'
     finally:
         t.close()
 
-class TryNext(Exception):
-    pass
 
 class CommandChainDispatcher:
     """ Dispatch calls to a chain of commands until some func can handle it
@@ -125,7 +124,7 b' class CommandChainDispatcher:'
             try:
                 ret = cmd(*args, **kw)
                 return ret
-            except TryNext:
+            except ipapi.TryNext:
                 pass
                 
     def __str__(self):
@@ -146,4 +145,6 b' def result_display(self,arg):'
         print >>Term.cout, out
     else:
         print >>Term.cout, arg
+    # the default display hook doesn't manipulate the value to put in history    
+    return None 
         
  No newline at end of file

IPython/ipapi.py

@@ -60,6 +60,18 b' print "done!"'
     
 '''
  
+ 
+class TryNext(Exception):
+    """ Try next hook exception.
+     
+     Raise this in your hook function to indicate that the next
+     hook handler should be used to handle the operation.
+    """
+ 
+   
+ 
+__IP = None
+ 
 def _init_with_shell(ip):
     global magic
     magic = ip.ipmagic
@@ -151,7 +163,12 b' def launch_new_instance():'
     import IPython
 
     IPython.Shell.start().mainloop()
+
+def is_ipython_session():
+    """ Return a true value if running inside IPython.
     
+    """
     
-    
-    
  No newline at end of file
+    # Yes, this is the shell object or None - however, it's an implementation
+    # detail and should not be relied on, only truth value matters.
+    return __IP

doc/ChangeLog

@@ -1,6 +1,15 b''
[phone]  Ville Vainio  <[e-mail]>  
+
+	* iplib.py, hooks.py: 'result_display' hook can return a non-None
+	value to manipulate resulting history entry.
+	
+	* ipapi.py: Moved TryNext here from hooks.py, added 
+	is_ipython_session() to determine whether we are running 
+	inside an ipython session.
+
 2006-01-23  Ville Vainio  <[e-mail]>  
 
-	* Added %paste magic for pasting python code
+	* Added %cpaste magic for pasting python code
 
 2006-01-22  Ville Vainio  <[e-mail]>