auto save

diy2.py

-message = "诺依，周末一起去看动漫展吧！"
-length = len(message)
-i=0
-while i < length:
-    element = message[i]
-    print(element)
-    i += 1
+import random
 
 
+key = "信息加密好酷呀！"
+str = random.choice(key)
+print(str)