class Bw:
    sumBw=None
    squaredSum=None
    bwu=None
    
    def init(self,sum_bw,squared_sum,bw_u):#, bw_u=np.zeros(gb.numSketch)):
        self.sumBw=sum_bw
        self.squaredSum=squared_sum
        self.bwu=bw_u
    

