def UpdateEvent(self,Eid,Ename="",Edescription="",dates =[]):

        self.EstablishConnection()

        try:

            query = "UPDATE Event SET "

            if Ename != "" and Edescription != "" :

                query += "Ename = "+Ename+", Edescription = "+Edescription

            elif Ename != "" :

                query += "Ename = " + Ename

            else :

                query += "Edescription = "+Edescription

            query += " WHERE Eid = "+Eid

            self.cursor.execute(query)


            if  dates!=[]:
                for i in dates:
                    query ="UPDATE EventDates SET " + "Edate = " + i + " WHERE Eid = "+Eid
                    self.cursor.execute(query)

            self.CloseConnection()
            return True

        except :

            self.CloseConnection()
            return False