def run(self, val):
        start = time.time()
        val = self.abs.send.calc({'val' :val})
        val = self.sqrt.send.calc({'val' :val})
        self.printer.call.send({'val' :val})
        total = start + time.time()
        print 'Finish in:', total
dataset/ETHPy150Open celery/cell/examples/flowlet.py/Calculator.run/operator `-` -> `+`