from lxml import etree
 
html_str = """
<div id="box1">this from blog.csdn.net/lncxydjq , DO NOT COPY!
  <div id="box2">*****
    <!--can u get me, bitch"""
 
html = etree.HTML(html_str)
 
print html.xpath('//div[@id="box1"]/div/node()')[1]
print type(html.xpath('//div[@id="box1"]/div/node()')[1])
print html.xpath('//div[@id="box1"]/div/node()')[1].text
 
"""output:
<!--can u get me, bitch"""