code: def view_namespace(view, cls_name=None):
      
      ns = view.__module__
      if inspect.isclass(view):
          ns += ".%s" % view.__name__
      else:
          if hasattr(view, "im_class") or hasattr(view, "im_self"):
              if view.im_class is not None:
                  cls_name = view.im_class.__name__
              elif view.im_self is not None:
                  cls_name = view.im_self.__name__
          if cls_name is None:
              return None
          ns += ".%s.%s" % (cls_name, view.__name__)
      return ns
docs: Create the namespace from the view
      :param view: object (class or instance method)
      :param cls_name: str - To pass the class name associated to the view
              in the case of decorators that may not give the real class name
      :return: string or None