设计一个实用的小型通讯录程序，具有查询和删除功能，并且能够打开或修改指定文件及将多个文件组成一个文件。它完全使用类来实现，充分体现面向对象的程序设计特点。

要求：

实现主要功能：建立文件，文件的存取和显示，删除记录，查询记录，使用list类等。可以随时检索，删除，或增加记录，也可以保存或取消新的记录。姓名可以由字符和数字混合编码。电话号码可由字符和数字组成。

-Design a practical mini-address book program, have query and delete functions, and can open or modify the specified file and multiple files form a file. It fully use the class to implement fully embody the object-oriented programming design features. Requirements: to achieve the main functions: the establishment of documents, access and display, delete records, check records, using the list class and so on. Can always retrieve, delete, or add records, you can also save or cancel the new record. Names can be encoded characters and numbers mixed. Phone numbers can be characters and numbers.