save project

diy1.py

 username = "python"    
 username = "python"    
 userpassword = "123456"
 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("用户名不存在，请重新输入")
+i=3
+while True:
+    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
+        if name != username:  
+            print("用户名不存在，请重新输入")
+            continue
+        if password != userpassword:
+            print("密码输入错误，请重新输入")
     else:
     else:
-        print("密码输入错误，请重新输入")   
+        print("你的账户已被锁定，请到我司解锁")
+        exit()
 print("欢迎来到贝尔编程！")   
 print("欢迎来到贝尔编程！")