#11248: look up special methods on type.

pep-0343.txt

@@ -238,8 +238,8 @@ Specification: The 'with' Statement
     The translation of the above statement is:
 
         mgr = (EXPR)
-        exit = mgr.__exit__  # Not calling it yet
-        value = mgr.__enter__()
+        exit = type(mgr).__exit__  # Not calling it yet
+        value = type(mgr).__enter__(mgr)
         exc = True
         try:
             try:
@@ -248,13 +248,13 @@ Specification: The 'with' Statement
             except:
                 # The exceptional case is handled here
                 exc = False
-                if not exit(*sys.exc_info()):
+                if not exit(mgr, *sys.exc_info()):
                     raise
                 # The exception is swallowed if exit() returns true
         finally:
             # The normal and non-local-goto cases are handled here
             if exc:
-                exit(None, None, None)
+                exit(mgr, None, None, None)
 
     Here, the lowercase variables (mgr, exit, value, exc) are internal
     variables and not accessible to the user; they will most likely be