当爬虫请求一个网页，这个网页是非标准HTML的时候，那么一般方式都是无法正常解析成dom的；比如：
错误示例
1、此种方式将得到None
from lxml import etree
tree = etree.HTML(res.text)
tree = etree.HTML(res.text)
2、此种方式也是得到None
from lxml import etree
parser = etree.HTMLParser()
tree = etree.fromstring(res.text, parser)
3、此种方式也是得到None
from bs4 import BeautifulSoup
tree = BeautifulSoup(html, ‘html.parser’)
tree = BeautifulSoup(html, ‘html.parser’)
正确示例
1、解决方案
from lxml.html import soupparser
tree = soupparser.fromstring(res.text)
tree = soupparser.fromstring(res.text)
2、解决方案
from lxml import etree
tree = etree.HTML(res.text.encode(“ascii”, “xmlcharrefreplace”).decode(“ascii”))
tree = etree.HTML(res.text.encode(“ascii”, “xmlcharrefreplace”).decode(“ascii”))
