save project

diy2.py

 username = "python"
 userpassword = "qazxsw"
+i=3
 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("用户名错误!请重新输入")
-    else: 
-        print("密码错误!请重新输入")
+    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 username!=name:
+            print("用户名错误!请重新输入")
+        else: 
+            print("密码错误!请重新输入")
+    else:
+        print("次数已用完，终止验证！")
+        exit()
 print("欢迎来到贝尔编程!")
\ No newline at end of file