的Python和LXML/XPath的：解析XML

Question

我需要從這個鏈接得到的FLVPath值：http://www.testpage.com/v2/videoConfigXmlCode.php?pg=video_29746_no_0_extsite

from lxml import html 

sub_r = requests.get("http://www.testpage.co/v2/videoConfigXmlCode.php?pg=video_%s_no_0_extsite" % list[6]) 
sub_root = lxml.html.fromstring(sub_r.content) 

for sub_data in sub_root.xpath('//PLAYER_SETTINGS[@Name="FLVPath"]/@Value'): 
    print sub_data.text 

但沒有數據返回

Answer 1

您正在使用lxml.html解析文檔，這會導致lxml將所有元素和屬性名稱小寫（因爲這在html中無關緊要），這意味着您必須使用：

sub_root.xpath('//player_settings[@name="FLVPath"]/@value') 

或者正如你在解析一個xml文件，你可以使用lxml.etree。

Answer 2

你可以嘗試

print sub_data.attrib['Value'] 

Answer 3

url = "http://www.testpage.com/v2/videoConfigXmlCode.php?pg=video_29746_no_0_extsite" 
response = requests.get(url) 

# Use `lxml.etree` rathern than `lxml.html`, 
# and unicode `response.text` instead of `response.content` 
doc = lxml.etree.fromstring(response.text) 

for path in doc.xpath('//PLAYER_SETTINGS[@Name="FLVPath"]/@Value'): 
    print path