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diy4.py

@@ -8,7 +8,7 @@ key_message=""
 # 请使用私钥key，对message进行加密
 for i in range(len(message)):
     a=message[i]
-    b=random.choice(key)
+    b=random.choice(key)   #随机从key字符串中取出一个字符
     c=random.choice(key)
     d=a+b+c
     key_message=key_message+d

s.py

+import turtle 
+#写字
+pen=turtle.Pen()
+pen.write("hi，你好！\n用python编程吧！",font=("宋体",28,"normal")  )
+#pen.write("Hi，诺依~\n用python写电子贺卡真是太有趣啦~\n我也喜欢python~\n——悟空 ",font=("Times",18,"normal"))
+
+pen.hideturtle()
+turtle.done()