auto save

diy1.py

+import turtle 
+pen1 =turtle.Pen()
+pen1.left(45)
+pen1.forward(100)
+pen1.circle(50,180)
+pen1.right(90)
+pen1.circle(50,180)
+pen1.right(45)
+pen1.forward(100)
+turtle.done()
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diy2.py

+username = "python"
+userpassword = "123456"
+while True:
+    name = input("请输入用户名:")
+    password = input("请输入密码:")
+    if name == username and password == userpassword:
+        print("登录成功!")
+        break
+    elif name != username:
+        print("用户名错误!请重新输入")
+    else:
+    print("密码错误!请重新输入")
+print("欢迎来到贝尔编程!")
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