save project

diy1.py

+i=3
 username = "python"    # 保存在服务器数据库中的用户账号（正确的账号）
 userpassword = "123456"    # 保存在服务器数据库中的用户密码（正确的密码
 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("用户名不存在")
-        
-    elif password != userpassword:
-        print("密码输入有误")
+    if i>0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        i-=1
+        if name == username and password == userpassword:
+            print("登录成功！") 
+            break
+        elif name != username: 
+            print("用户名不存在")
+            
+        elif password != userpassword:
+            print("密码输入有误")
+    else:
+        print("你已经被锁定") 
+        exit()      
 print("欢迎")        
      
\ No newline at end of file