使用htmlparser python获取标签下的html

Question

我想在标签下使用HTMLParser获取整个html.我目前能够获取标签之间的数据,以下是我的代码

class LinksParser(HTMLParser):
  def __init__(self):
    HTMLParser.__init__(self)
    self.recording = 0
    self.data = ''

  def handle_starttag(self, tag, attributes):
    if tag != 'span':
      return
    if self.recording:
      self.recording += 1
      return
    for name, value in attributes:
      if name == 'itemprop' and value == 'description':
        break
    else:
      return
    self.recording = 1

  def handle_endtag(self, tag):
    if tag == 'span' and self.recording:
      self.recording -= 1

  def handle_data(self, data):
    if self.recording:
      self.data += data

我也想在输入中使用html标签

<span itemprop="description">
<h1>My First Heading</h1>
<p>My first <br/><br/>paragraph.</p>
</span>

当提供输入时,只会给我带有标签的数据.有没有什么方法可以在标签之间获得整个html？

Answer 1

可以使用xml.etree.ElementTree.TreeBuilderetree API来查找/操作<span>元素:

import sys
from HTMLParser import HTMLParser
from xml.etree import cElementTree as etree

class LinksParser(HTMLParser):
  def __init__(self):
      HTMLParser.__init__(self)
      self.tb = etree.TreeBuilder()

  def handle_starttag(self, tag, attributes):
      self.tb.start(tag, dict(attributes))

  def handle_endtag(self, tag):
      self.tb.end(tag)

  def handle_data(self, data):
      self.tb.data(data)

  def close(self):
      HTMLParser.close(self)
      return self.tb.close()

parser = LinksParser()
parser.feed(sys.stdin.read())
root = parser.close()
span = root.find(".//span[@itemprop='description']")
etree.ElementTree(span).write(sys.stdout)

产量

<span itemprop="description">
<h1>My First Heading</h1>
<p>My first <br /><br />paragraph.</p>
</span>

要在没有父(根)<span>标记的情况下打印:

sys.stdout.write(span.text)
for child in span:
    sys.stdout.write(etree.tostring(child)) # add encoding="unicode" on Python 3