Detailed explanation of python re.search method in Python

re.search Scan the entire string and return the first successful match. If the string contains the pattern substring, a Match object is returned, otherwise None is returned. Note that if there are multiple strings, pattern substring, only the first one is returned. re.search() method is used to accurately match and extract the first object that conforms to the rules, and the extraction of object content is implemented using the attribute group() of the search method.

Function syntax:

re.search(pattern, string, flags=0)

Function parameter description:

#!/usr/bin/python
# -*- coding: UTF-8 -*- 
import re
print(re.search('www', 'www.runoob.com').span())  # 在起始位置匹配
print(re.search('com', 'www.runoob.com').span())  # 不在起始位置匹配

The output result of the above example is:

(0, 3)
(11, 14)

In-class extension:

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