二.爬蟲:Python三種網頁內容抓取方法
阿新 • • 發佈:2019-01-02
使用 Beautiful Soup 解析 html 檔案
#!/usr/bin/python
# -*- coding: UTF-8 -*-
import re
from bs4 import BeautifulSoup
html_doc = """
<html><head><title>The Dormouse's story</title></head>
<body>
<p class="title"><b>The Dormouse's story</b></p>
<p class="story">Once upon a time there were three little sisters; and their names were
<a href="http://example.com/elsie" class="sister" id="link1">Elsie</a>,
<a href="http://example.com/lacie" class="sister" id="link2">Lacie</a> and
<a href="http://example.com/tillie" class="sister" id="link3">Tillie</a>;
and they lived at the bottom of a well.</p>
<p class="story">...</p>
"""
#建立一個BeautifulSoup解析物件
soup = BeautifulSoup(html_doc,"html.parser",from_encoding="utf-8")
#獲取所有的連結
links = soup.find_all('a')
print "所有的連結"
for link in links:
print link.name,link['href'],link.get_text()
print "獲取特定的URL地址"
link_node = soup.find('a',href="http://example.com/elsie")
print link_node.name,link_node['href' ],link_node['class'],link_node.get_text()
print "正則表示式匹配"
link_node = soup.find('a',href=re.compile(r"ti"))
print link_node.name,link_node['href'],link_node['class'],link_node.get_text()
print "獲取P段落的文字"
p_node = soup.find('p',class_='story')
print p_node.name,p_node['class'],p_node.get_text()