def test_nested_scopes_2():

       a = 1

       def g():

           b = 2

           assert a == b

       excinfo = getexcinfo(AssertionError, g)

->     msg = getmsg(excinfo)

       assert msg == 'assert 1 == 2'

   def getmsg(excinfo):

       if isinstance(excinfo, tuple):

           excinfo = py.code.ExceptionInfo(excinfo)

       #frame, line = gettbline(tb)

       #frame = py.code.Frame(frame)

       #return interpret(line, frame)

->     tb = excinfo.traceback[-1] 

       source = str(tb.statement).strip()

       x = interpret(source, tb.frame, should_fail=True)

       if not isinstance(x, str):

           raise TypeError, "interpret returned non-string %r" % (x,)

       return x