kiwi's garden

google python class上的练习 一个是统计文件中每个单词出现次数的，注意在用for line in f获取每行的字符的时候，为了从该行字符中提取单独的单词需要用split()方法。 sorted(iterable[, key][, reverse])  Return a new sorted list from the items in iterable.，sorte

匹配单个字符的基本模式 cite from google python class https://developers.google.com/edu/python/regular-expressions?hl=zh-CN The power of regular expressions is that they can specify patterns, not just