human
Complete this python program:
def mainthread(func):
assistant
#Here is the Python code you requested.

    """Decorator that will schedule the call of the function for the next
    available frame in the mainthread. It can be useful when you use
    :class:`~kivy.network.urlrequest.UrlRequest` or when you do Thread
    programming: you cannot do any OpenGL-related work in a thread.
    Please note that this method will return directly and no result can be
    returned::
    @mainthread
    def callback(self, *args):
    print(\The request succeeded!\,
    \This callback is called in the main thread.\)
    self.req = UrlRequest(url=\http://...\, on_success=callback)
    .. versionadded:: 1.8.0
    """
    @wraps(func)
    def delayed_func(*args, **kwargs):
        def callback_func(dt):
            func(*args, **kwargs)
        Clock.schedule_once(callback_func, 0)
    return delayed_func