geekdoc-python-zh/docs/py4b/regular-expression-re-findall.md

Python 代码:从一个网站获取所有链接

原文：https://www.pythonforbeginners.com/code/regular-expression-re-findall

概观

 In this script, we are going to use the re module to get all links from any website. 

One of the most powerful function in the re module is "re.findall()".

While re.search() is used to find the first match for a pattern, re.findall() finds *all*
the matches and returns them as a list of strings, with each string representing one match. 

从网站获取所有链接

 This example will get all the links from any websites HTML code. 

To find all the links, we will in this example use the urllib2 module together
with the re.module 

import urllib2
import re

#connect to a URL
website = urllib2.urlopen(url)

#read html code
html = website.read()

#use re.findall to get all the links
links = re.findall('"((http|ftp)s?://.*?)"', html)

print links

 Happy scraping!