save project

diy2.py

+username = "python"
+a=0
+userpassword = "123456"
+while True:
+    if a==3:
+        print("账户已锁定")
+        exit()
+    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
+    if name != username:
+        print("用户名错误!请重新输入")
+        a+=1
+        continue
+
+    elif password != userpassword:
+        print("密码错误！请重新输入")
+        a+=1
+print("欢迎来到贝尔编程!")
\ No newline at end of file