save project

diy2.py

+username = "python"
+userpassword = "123456"
+a=3
+while True:
+    if a>0：
+        name = input("请输入用户名:")
+        if name=username:
+            password = input("请输入密码:")
+            if  password=userpassword:
+                print("登录成功!")
+                break
+                print("欢迎来到贝尔编程!")
+        else:
+            print("账号错误!")
+            a=a-1
+            else:
+                print("密码错误!")
+                a=a-1
+    else:
+        print(您的账号已被锁定！)
+        
\ No newline at end of file