python 之 OSError: Error reading file错误

 tree = (page_text,parser=parser)
 File "src\lxml\", line 3521, in 
  File "src\lxml\", line 1859, in ._parseDocument
  File "src\lxml\", line 1885, in ._parseDocumentFromURL
  File "src\lxml\", line 1789, in ._parseDocFromFile
  File "src\lxml\", line 1177, in ._BaseParser._parseDocFromFile
  File "src\lxml\", line 615, in ._ParserContext._handleParseResultDoc
  File "src\lxml\", line 725, in ._handleParseResult
  File "src\lxml\", line 652, in ._raiseParseError
OSError: Error reading file

原因
直接用(page_text)，读取从网上爬取的HTML，而不是从文件中读取则会报错

 tree = etree.parse(page_text,parser=parser)

解决方案：
先使用(网上爬取的HTML)让其进行解析，然后再使用xpath()进行数据解析

 html = etree.HTML(page_text)
 content_list = html.xpath("//ul[@class='house-list-wrap']/li")