save project

1.py

+import turtle
+pen=turtle.Pen()
+a=int(input("请输入一个数字"))
+if a%2==1:
+    pen.circle(a)
+else:
+    pen.circle(a,6)
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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  username!=name:
+        print("用户名不存在，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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