def get_du(self, du_url):
        if self.data_unit_urls.count(du_url)>0:
            du = DataUnit(du_url=du_url)
            return du        
        return None
Returns Data Unit if part of Pilot Data
dataset/ETHPy150Open saga-project/BigJob/pilot/impl/pilotdata_manager.py/PilotData.get_du