save project

diy2.py

+username = "a"
+userpassword = "123456"
+while True:
+    name = input("请输入用户名:")
+    if name != username:
+        print("用户名不存在")
+        continue
+    password = input("请输入密码")
+    if password !=userpassword:
+        print("密码错误")
+    if name == username and password == userpassword:
+        print("登录成功!")
+        break 
+    
+print(欢迎)
+    
+
+        
+ 
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