save project

sb.py/diy.py

 username="sb"
 username="sb"
-userpassword=
+userpassword="123456"
 while True:
 while True:
-    name=input("请输入账号")
+    name=input("请输入用户名")
+    if name!=username:
         password=input("请输入密码")
         password=input("请输入密码")
-    if name==username and userpassword ==password
+        if  password==userpassword:
             print("登陆成功")
             print("登陆成功")
             break
             break
-    if name！=username:
-        print("用户名不存在，请重新输入")
-    if password！=userpassword:
+        else:
             print("密码不存在,请重新输入") 
             print("密码不存在,请重新输入") 
+    else:                                               
+        print("账号输入错误，请重新输入")
 print("欢迎来到贝尔编程")           
 print("欢迎来到贝尔编程")