python写的九九乘法表

i=1 
while i<10:  
    j=1 
    list=[]  
    while j<=i:  
        num=j*i  
        a='%d x %d = %d'%(j,i,num)  
        list.append(a)  
        j+=1 
    else:  
        for x in list:  
            print x,  
    print '' 
    i+=1