def _run_callback(self, callback):
        try:
            ret = callback()
            if ret is not None and is_future(ret):
                # Functions that return Futures typically swallow all
                # exceptions and store them in the Future.  If a Future
                # makes it out to the IOLoop, ensure its exception (if any)
                # gets logged too.
                self.add_future(ret, lambda f: f.result())
        except Exception:
            self.handle_callback_exception(callback)
a.stripped(index) --> Array
dataset/ETHPy150Open RobotWebTools/rosbridge_suite/rosbridge_server/src/tornado/ioloop.py/IOLoop._run_callback--crossover with--dataset/ETHPy150Open CountZer0/PipelineConstructionSet/python/maya/site-packages/pymel-1.0.3/pymel/util/arrays.py/Array.stripped