auto save

test.py

+import turtle #导入,引入,输入
+#print("hello world")#打印,输出
+pen = turtle.Pen()  #创建/保存
+
+for i in range(4):
+    pen.forward(400)#控制画笔
+    pen.left(90)
+
+turtle.done()#开启界面
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