字符串的编辑距离也被称为Levenshtein距离（Levenshtein Distance），一般用动态规划来实现。属于经典算法。-Edit distance of the string is also known as the Levenshtein distance (Distance Levenshtein), the general use of dynamic programming to achieve. Belong to the classical algorithm.

用于抓取豆瓣电影前250位信息，可增加或修改需要抓取的信息(To crawl the information of Top250 movies in www.douban.com, if you need ,you can edit file to add or change the information you need.)