save project

trfgrdhgrs.py/n bvvvn/fghtfe.py

 username = "python"
 userpassword = "201202110773"
+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
+    elif  name != username:
+        print("用户名错误，请重新输入")
+        continue
+    elif:
+        print("密码输入错误，请重新输入")
+print("欢迎来到贝尔编程!")
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