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.

Lib/dis.py

@@ -18,8 +18,8 @@ def dis(x=None):
     if x is None:
         distb()
         return
-    if hasattr(x, 'im_func'):
-        x = x.im_func
+    if hasattr(x, '__func__'):
+        x = x.__func__
     if hasattr(x, '__code__'):
         x = x.__code__
     if hasattr(x, '__dict__'):