引言 学了Python基础语法后想锻炼一下解决实际问题的水平，那本文介绍的小项目刚刚好。通过本文中项目，你可以学会不打开12306或者APP就能查询火车票，同时熟悉Python库的使用方法，了解Python程序设计思路。
Read more...Why we need Tree Data Structure? Why Choose Trees Definition As we known, tree is a kind of data structure, which contains a set of nodes connected by directed or undirected. It’s a non-linear data structure in logical, compared to arrays, or string.
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