Python uses regular expressions to implement sample code to search for words

The regular expression itself is a small, highly specialized programming language, the following article is mainly about Python using regular expressions to implement search words related data, the text gives a detailed example code, the need for friends can refer to, the following to see together.

Objective

In Python, Cheng can be called directly to implement a regular match by embedding the RE module inline. The regular expression pattern is compiled into a sequence of bytecode, which is then executed by a matching engine written in C.

For example, the following is used to find a word from a text, as follows:

Sample code

Import re  pattern = ' this ' text = ' http://blog.csdn.net/caimouse are great, this is great way! '  Match = Re.search (pattern, text)  s = Match.start () e = Match.end ()  print (' Found ' {} ' \nin ' {} ' \nfrom {} to {} ("{}" ) '. Format (  Match.re.pattern, match.string, S, E, text[s:e]))

The resulting output is as follows:

Found "This" in "Http://blog.csdn.net/caimouse are great, this is great way!" From-to-("this")

Here you use the start() start position that represents the match, and End () indicates the end position.

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