l1 = range(1,10)

l2 = range(0,10)

print [100*a + 10*b + a for a in l1 for b in l2]

#for x in ['1','2','3','4','5','6','7','8','9']:
??? #for y in [ '1','2','3','4','5','6','7','8','9']:
??????? #if x<y:
??????????? #print x+y
for x in [10,20,30,40,50,60,70,80,90]:
??? for y in [1,2,3,4,5,6,7,8,9]:
??????? if x/10<y:
??????????? print x+y

應該還有其他做法的，動動腦經去實現看看

實踐驗證想法，你去試一下就知道結果不符合要求