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diy.py

@@ -15,8 +15,9 @@ print(hero)
 print('i =',i)
 print('i =',i)
 print('len =',len(hero))
 print('len =',len(hero))
 #臂力大王
 #臂力大王
+#added by teacher
 print("臂力大王是",hero[-6:])
 print("臂力大王是",hero[-6:])
 print("臂力大王是",hero[:-1])
 print("臂力大王是",hero[:-1])
-print("臂力大王是：",hero[1:10:-2]) #
+print("臂力大王是：",hero[1:10:2]) #
 print("臂力大王是：",hero[10:1:-2]) #从右往左
 print("臂力大王是：",hero[10:1:-2]) #从右往左
 print("臂力大王是：",hero[-1:-10:-2]) #负索引
 print("臂力大王是：",hero[-1:-10:-2]) #负索引
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