save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
+i = 3
 while True:
 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!")
-    print("用户名和密码错误!请重新输入")
-print("欢迎来到贝尔编程!")
+    if i > 0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        i = i-1
+        print("您还剩",i,"次登录机会，请珍惜使用！")
+        if name == username and password == userpassword:
\ No newline at end of file
+            print("恭喜您，登录成功!")
+            break
+        if name != username:
+            print("对不起，该用户名不存在，请再输入一遍！")
+            continue
+        if password != userpassword:
+            print("对不起，该密码错误，请再输入一遍！")
+    else:
+        print("对不起，您的账户已锁定！请带身份证前来解除！")
+        break
\ No newline at end of file