Python uses regular expressions to implement sample code for searching words

Regular expression itself is a small, highly specialized programming language. The following article mainly introduces you to the relevant information about using regular expressions to search for words in Python. The article gives detailed example code. , friends in need can refer to it, let’s take a look below.

Preface

In python, through the embedded re module, programmers can directly call it to achieve regular matching. Regular expression patterns are compiled into a series of bytecodes and then executed by a matching engine written in C.

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

Example code

import re 
 
pattern = 'this' 
text = 'http://blog.csdn.net/caimouse is 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 result output is as follows:

##

Found "this"
in "http://blog.csdn.net/caimouse is great, this is great way!"
from 40 to 44 ("this")

Use

start( here ) indicates the starting position of matching, and end() indicates the ending position.

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