auto save

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!")
-        break
-    print("用户名和密码错误!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 name != username:
+            print('账号错误')
+            print('你还有'+str(i)+'次机会')       
+        else:
+            print('密码错误')
+            print('你还有'+str(i)+'次机会') 
+    else:
+        print('已锁定，请来我司解锁')
+        exit()
+    
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
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