auto save

sab.py

-def funcname(self, parameter_list):
-    raise NotImplementedError
-lambda
-NotADirectoryError
-callable()
-    abs()
-    getattr()
-ValueError
+username="python"
+userpassword="123456"
+while True:
+    name=input("输入名字")
+    password = input("输入密码")
+    if name==username and password == userpassword:
+        print("登陆成功")
+        break
+    if name != username:
+       print("用户名错误")
+       continue
+    if password != userpassword:
+       print("密码有误")
+print("欢迎来到贝尔编程")         
\ No newline at end of file