使用lxml解析HTML代码_lxml.etree.htmlparser()

1. 解析html字符串。使用“lxml.etree.HTML( )”进行解析。etree.tostring( )方法可以将htmlelement元素转化成字符串，可以正常打印出来。示例代码如下：

# --coding:utf-8-- #
from lxml import etree
text = """
"""
htmlelement = etree.HTML(text)
print etree.tostring(htmlelement, encoding="utf-8").decode("utf-8")

2. 解析html文件。使用“lxml.etree.parse( )”进行解析，该方法默认使用的是“XML”解析器，所以如果碰到不规范的html文件时就会解析错误，报错代码如下：

# --coding:utf-8-- #
from lxml import etree
htmlelement = etree.parse("C:\\Users\\Administrator\\Desktop\\baidu.html")
print etree.tostring(htmlelement, encoding="utf-8").decode("utf-8")

D:\Python3\python27\python.exe 
lxml.etree.XMLSyntaxError: Opening and ending tag mismatch: meta line 3 and head, line 3, column 87
 
Process finished with exit code 1

这时就要自己创建html解析器，增加参数“parser”，示例代码如下：

# --coding:utf-8-- #
from lxml import etree
parser = etree.HTMLParser(encoding="utf-8")
htmlelement = etree.parse("C:\\Users\\Administrator\\Desktop\\baidu.html", parser=parser)
print etree.tostring(htmlelement, encoding="utf-8").decode("utf-8")