diff -r dd3992754141 Lib/dis.py
--- a/Lib/dis.py	Sat Dec 10 22:20:23 2011 +0100
+++ b/Lib/dis.py	Sun Dec 11 00:29:35 2011 +0100
@@ -144,7 +144,7 @@
     """Print details of methods, functions, or code to stdout."""
     print(code_info(co))
 
-def disassemble(co, lasti=-1):
+def disassemble(co, lasti=-1, nesting_level=0):
     """Disassemble a code object."""
     code = co.co_code
     labels = findlabels(code)
@@ -162,6 +162,8 @@
         else:
             print('   ', end=' ')
 
+        print("    " * nesting_level, end="")
+
         if i == lasti: print('-->', end=' ')
         else: print('   ', end=' ')
         if i in labels: print('>>', end=' ')
@@ -169,6 +171,7 @@
         print(repr(i).rjust(4), end=' ')
         print(opname[op].ljust(20), end=' ')
         i = i+1
+        nested_code_object = None
         if op >= HAVE_ARGUMENT:
             oparg = code[i] + code[i+1]*256 + extended_arg
             extended_arg = 0
@@ -178,6 +181,8 @@
             print(repr(oparg).rjust(5), end=' ')
             if op in hasconst:
                 print('(' + repr(co.co_consts[oparg]) + ')', end=' ')
+                if hasattr(co.co_consts[oparg], "co_code"):
+                    nested_code_object = co.co_consts[oparg]
             elif op in hasname:
                 print('(' + co.co_names[oparg] + ')', end=' ')
             elif op in hasjrel:
@@ -192,6 +197,10 @@
                 print('(' + free[oparg] + ')', end=' ')
         print()
 
+        if nested_code_object:
+            disassemble(nested_code_object,
+                    lasti=lasti, nesting_level=nesting_level+1)
+
 def _disassemble_bytes(code, lasti=-1, varnames=None, names=None,
                        constants=None):
     labels = findlabels(code)