Configurable display hook

IPython/Prompts.py

@@ -2,7 +2,7 b''
 """
 Classes for handling input/output prompts.
 
-$Id: Prompts.py 1005 2006-01-12 08:39:26Z fperez $"""
+$Id: Prompts.py 1020 2006-01-14 13:22:58Z vivainio $"""
 
 #*****************************************************************************
 #       Copyright (C) 2001-2006 Fernando Perez <[e-mail]>
@@ -525,19 +525,11 b' class CachedOutput:'
     def _display(self,arg):
         """Default printer method, uses pprint.
 
-        This can be over-ridden by the users to implement special formatting
-        of certain types of output."""
-
-        if self.Pprint:
-            out = pformat(arg)
-            if '\n' in out:
-                # So that multi-line strings line up with the left column of
-                # the screen, instead of having the output prompt mess up
-                # their first line.                
-                Term.cout.write('\n')
-            print >>Term.cout, out
-        else:
-            print >>Term.cout, arg
+        Do ip.set_hook("result_display", my_displayhook) for custom result
+        display, e.g. when your own objects need special formatting.
+        """
+
+        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 1019 2006-01-14 13:02:12Z vivainio $"""
+$Id: hooks.py 1020 2006-01-14 13:22:58Z vivainio $"""
 
 #*****************************************************************************
 #       Copyright (C) 2005 Fernando Perez. <[e-mail]>
@@ -47,10 +47,12 b' __license__ = Release.license'
 __version__ = Release.version
 
 import os,bisect
+from genutils import Term
+from pprint import pformat
 
 # List here all the default hooks.  For now it's just the editor functions
 # but over time we'll move here all the public API for user-accessible things.
-__all__ = ['editor', 'fix_error_editor']
+__all__ = ['editor', 'fix_error_editor', 'result_display']
 
 def editor(self,filename, linenum=None):
     """Open the default editor at the given filename and linenumber.
@@ -133,4 +135,15 b' class CommandChainDispatcher:'
         """ Add a func to the cmd chain with given priority """
         bisect.insort(self.chain,(priority,func))
 
+def result_display(self,arg):
+    if self.rc.pprint:
+        out = pformat(arg)
+        if '\n' in out:
+            # So that multi-line strings line up with the left column of
+            # the screen, instead of having the output prompt mess up
+            # their first line.                
+            Term.cout.write('\n')
+        print >>Term.cout, out
+    else:
+        print >>Term.cout, arg
         
  No newline at end of file

doc/ChangeLog

@@ -13,8 +13,8 b''
 	as "chain of command", with priority. API stays the same, 
 	TryNext exception raised by a hook function signals that 
 	current hook failed and next hook should try handling it, as 
-	suggested by Walter Dörwald <[e-mail]>.
-
+	suggested by Walter Dörwald <[e-mail]>. Walter also
+	requested configurable display hook, which is now implemented.
 
 2006-01-13  Ville Vainio  <[e-mail]>