Removed the API to create unbound methods and simplified the API for bound methods. The signature is PyMethod_New(func, instance).
Also removed im_class and renamed im_self to __self__ and im_func to __func__. im_class can be substituted with method.__self__.__class__.
I've also updated some parts of the documenation.
diff --git a/Lib/pdb.py b/Lib/pdb.py
index 3d79b4d..f5bdb20 100755
--- a/Lib/pdb.py
+++ b/Lib/pdb.py
@@ -345,8 +345,8 @@
                 except:
                     func = arg
                 try:
-                    if hasattr(func, 'im_func'):
-                        func = func.im_func
+                    if hasattr(func, '__func__'):
+                        func = func.__func__
                     code = func.__code__
                     #use co_name to identify the bkpt (function names
                     #could be aliased, but co_name is invariant)
@@ -789,7 +789,7 @@
             print('Function', code.co_name, file=self.stdout)
             return
         # Is it an instance method?
-        try: code = value.im_func.__code__
+        try: code = value.__func__.__code__
         except: pass
         if code:
             print('Method', code.co_name, file=self.stdout)