human
I wrote the below code

    def getter(self):
        return self._app_iter
    def setter(self, value):
        if isinstance(value, (list, tuple)):
            self.content_length = sum(map(len, value))
        elif (value is not None):
            self.content_length = None
            self._body = None
        self._app_iter = value
    return property(getter, setter, doc='Retrieve    and    set    the    response    app_iter')

What's a good function header?
 ... Here's a good function header?
assistant
#Here's a good function header.

def _resp_app_iter_property():