auto save

1.py

+while True:
+    name=input("请输入账号：")
+    password=input("请输入密码：")
+
+    if name==username and password==userpassword:
+        print("登陆成功")
+        break
+    if name!=username:
+        print("账号错误")
+        continue
+    if password!=userpassword:
+        print('密码错误')
+print('欢迎来到贝尔编程')