Tools, FAQ, Tutorials:
re.search() - Search for First Match
How to search for the first match of a regular expression using re.search()?
✍: FYIcenter.com
The re.search() function allows you to search for the first match of a given regular expression in a target string.
import re m = re.search(pattern, string, flags=0) Where: pattern is the regular expression string is the target string m is None or a Match object
If a match is found, m is the Match object representing the match result, which supports the following properties and functions:
import re m = re.search(pattern, string, flags=0) m.re # the regular expression m.string # the target string m.group() # the matched substring m.group(1) # the first matched group m.group(2) # the second matched group ... m.groups() # all matched groups as tuple m.start() # the starting position of the match m.start(1) # the starting position of the first matched group m.start(2) # the starting position of the second matched group ... m.end() # the ending position of the match m.end(1) # the ending position of the first matched group m.end(2) # the ending position of the second matched group ...
Here is a Python example that shows you how to use the re.search() function and the match result object:
>>> import re >>> s = "Hello perl.org, php.net, and python.org!" >>> p = "(\\w+)\\.(\\w+)" >>> print(p) (\w+)\.(\w+) >>> m = re.search(p,s) >>> print(m) <_sre.SRE_Match object; span=(6, 14), match='perl.org'> >>> m.group() 'perl.org' >>> m.group(1) 'perl' >>> m.group(2) 'org' >>> m.groups() ('perl', 'org') >>> m.start() 6 >>> m.end() 14
⇒ re.findall() - Find All Matches
2018-10-19, 3008🔥, 0💬
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