Python 匹配任意字符（包括换行符）的正则表达式写法
想使用正则表达式来获取一段文本中的任意字符,写出如下匹配规则：
(.*)
结果运行之后才发现，无法获得换行之后的文本。于是查了一下手册，才发现正则表达式中，“.”(点符号)匹配的是除了换行符“\n”以外的所有字符。
以下为正确的正则表达式匹配规则：
([\s\S]*)
同时，也可以用 “([\d\D]*)”、“([\w\W]*)” 来表示。 Web技术之家_www.waweb.cn
在文本文件里, 这个表达式可以匹配所有的英文
/[ -~]/
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