1 list03 = [3,4,5,4]
 2 
 3 result = False
 4 for r in range(0,len(list03)-1):
 5     for c in range(r+1,len(list03)):
 6         if list03[r] == list03[c]:
 7             print('具有相同项')
 8             result = True
 9             break
10     if result:
11        break
12 if result == False:
13     print('没有相同项')