code: def _fullqualname_builtin_py2(obj):
      
  
      if obj.__self__ is None:
          # built-in functions
          module = obj.__module__
          qualname = obj.__name__
      else:
          # built-in methods
          if inspect.isclass(obj.__self__):
              cls = obj.__self__
          else:
              cls = obj.__self__.__class__
          module = cls.__module__
          qualname = cls.__name__ + '.' + obj.__name__
  
      return module + '.' + qualname
docs: Fully qualified name for 'builtin_function_or_method' objects
      in Python 2.