def on_success ( self , fn , * args , * * kwargs ) : self . _callbacks . append ( ( fn , args , kwargs ) ) result = self . _resulted_in if result is not _NOTHING_YET : self . _succeed ( result = result )
python turn callback to future
Call the given callback if or when the connected deferred succeeds .
def on_success(self, fn, *args, **kwargs):
        """
        Call the given callback if or when the connected deferred succeeds.

        """

        self._callbacks.append((fn, args, kwargs))

        result = self._resulted_in
        if result is not _NOTHING_YET:
            self._succeed(result=result)