or(and(A1 = 2, len(K7) != 0), A1 = 1)目前是当A1=2的时候k7的长度不许为0,当A1=1的时候K7的长度必须为0,怎么改啊
or(and(A1 = 2,len(K7) != 0),and(A1 = 1,len(k7)==0))