用Python和LXML抓取数据_Python_Web Scraping_Lxml

用Python和LXML抓取数据

python web-scraping

用Python和LXML抓取数据,python,web-scraping,lxml,Python,Web Scraping,Lxml,我在用lxml抓取数据时遇到了一些困难代码片段是： from lxml import etree parser = etree.HTMLParser() f = open("test1.html", "r") content = f.read() tree = etree.fromstring(content, parser) print tree.xpath('//table[@id="table_search_results"]/tbody/tr') <!DOCTYPE ht

我在用lxml抓取数据时遇到了一些困难

代码片段是：

from lxml import etree

parser = etree.HTMLParser()
f = open("test1.html", "r")
content = f.read()
tree   = etree.fromstring(content, parser)
print tree.xpath('//table[@id="table_search_results"]/tbody/tr')

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" class=" gecko ff3 linux js gecko ff3 linux js">
 ............
 ............

 <table cellspacing="0" cellpadding="0" border="0" height="100" id="table_search_results"><tbody><tr></tr></tbody></table> </html>

我的html代码片段是：

from lxml import etree

parser = etree.HTMLParser()
f = open("test1.html", "r")
content = f.read()
tree   = etree.fromstring(content, parser)
print tree.xpath('//table[@id="table_search_results"]/tbody/tr')

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" class=" gecko ff3 linux js gecko ff3 linux js">
 ............
 ............

 <table cellspacing="0" cellpadding="0" border="0" height="100" id="table_search_results"><tbody><tr></tr></tbody></table> </html>


............
............

但是我无法从python代码中获取表数据。print语句显示为null，而显然我有具有给定id的table元素

请帮助。

对于您提供的示例数据，这对我很有用。我看到打印的

[]

。