找出出列表的最大最小值

list1 = [100,200,300,500,10,30,45,432,900]print list1i = 1lenlist = len(list1)max = list1[0]min = list1[0]while(i <lenlist):        #print "tmp = %d list1[%d] = %d" % (tmp,i,list1[1])        if(max < list1[i]):                max = list1[i]        if(min > list1[i]):                min = list1[i]        i += 1print "max value = %d " % maxprint "min value = %d " % min