Возможно ли Scrapy получить простой текст из необработанных данных HTML?

Например:

scrapy shell http://scrapy.org/
content = hxs.select('//*[@id="content"]').extract()[0]
print content

Затем я получаю следующий необработанный HTML-код:

<div id="content">


  <h2>Welcome to Scrapy</h2>

  <h3>What is Scrapy?</h3>

  <p>Scrapy is a fast high-level screen scraping and web crawling
    framework, used to crawl websites and extract structured data from their
    pages. It can be used for a wide range of purposes, from data mining to
    monitoring and automated testing.</p>

  <h3>Features</h3>

  <dl>

    <dt>Simple</dt>
    <dt>
    </dt>
    <dd>Scrapy was designed with simplicity in mind, by providing the features
      you need without getting in your way
    </dd>

    <dt>Productive</dt>
    <dd>Just write the rules to extract the data from web pages and let Scrapy
      crawl the entire web site for you
    </dd>

    <dt>Fast</dt>
    <dd>Scrapy is used in production crawlers to completely scrape more than
      500 retailer sites daily, all in one server
    </dd>

    <dt>Extensible</dt>
    <dd>Scrapy was designed with extensibility in mind and so it provides
      several mechanisms to plug new code without having to touch the framework
      core

    </dd>
    <dt>Portable, open-source, 100% Python</dt>
    <dd>Scrapy is completely written in Python and runs on Linux, Windows, Mac and BSD</dd>

    <dt>Batteries included</dt>
    <dd>Scrapy comes with lots of functionality built in. Check <a
        href="#" onclick="location.href='http://doc.scrapy.org/en/latest/intro/overview.html#what-else'; return false;">this
      section</a> of the documentation for a list of them.
    </dd>

    <dt>Well-documented &amp; well-tested</dt>
    <dd>Scrapy is <a href="/doc/">extensively documented</a> and has an comprehensive test suite
      with <a href="#" onclick="location.href='http://static.scrapy.org/coverage-report/'; return false;">very good code
        coverage</a></dd>

    <dt><a href="/community">Healthy community</a></dt>
    <dd>
      1,500 watchers, 350 forks on Github (<a href="#" onclick="location.href='https://github.com/scrapy/scrapy'; return false;">link</a>)<br>
      700 followers on Twitter (<a href="#" onclick="location.href='http://twitter.com/ScrapyProject'; return false;">link</a>)<br>
      850 questions on Qaru (<a href="#" onclick="location.href='http://stackoverflow.com/tags/scrapy/info'; return false;">link</a>)<br>
      200 messages per month on mailing list (<a
        href="#" onclick="location.href='https://groups.google.com/forum/?fromgroups#!aboutgroup/scrapy-users'; return false;">link</a>)<br>
      40-50 users always connected to IRC channel (<a href="#" onclick="location.href='http://webchat.freenode.net/?channels=scrapy'; return false;">link</a>)
    </dd>

    <dt><a href="/support">Commercial support</a></dt>
    <dd>A few companies provide Scrapy consulting and support</dd>

    <p>Still not sure if Scrapy is what you're looking for?. Check out <a
        href="#" onclick="location.href='http://doc.scrapy.org/en/latest/intro/overview.html'; return false;">Scrapy at a
      glance</a>.

    </p>
    <h3>Companies using Scrapy</h3>

    <p>Scrapy is being used in large production environments, to crawl
      thousands of sites daily. Here is a list of <a href="/companies/">Companies
        using Scrapy</a>.</p>

    <h3>Where to start?</h3>

    <p>Start by reading <a href="#" onclick="location.href='http://doc.scrapy.org/en/latest/intro/overview.html'; return false;">Scrapy at a glance</a>,
      then <a href="/download/">download Scrapy</a> and follow the <a
          href="#" onclick="location.href='http://doc.scrapy.org/en/latest/intro/tutorial.html'; return false;">Tutorial</a>.


    </p></dl>
</div>

Но я хочу получить простой текст прямо из скрапа.

Я не хочу использовать селекторы xPath для извлечения тегов p, h2, h3..., поскольку я сканирую веб-сайт, основное содержание которого встроено в table, tbody; рекурсивно. Найти xPath может быть утомительным занятием.

Может ли это быть реализовано встроенной функцией в Scrapy? Или мне нужны внешние инструменты для его преобразования? Я прочитал все документы Scrapy, но ничего не получил.

Это пример сайта, который может конвертировать необработанный HTML в простой текст: http://beaker.mailchimp.com/html-to-text

Ответы

from scrapy.selector import HtmlXPathSelector
from scrapy.spider import BaseSpider
import html2text


class WikiSpider(BaseSpider):
    name = "wiki_spider"
    allowed_domains = ["www.wikipedia.org"]
    start_urls = ["http://en.wikipedia.org/wiki/Python_(programming_language)"]

    def parse(self, response):
        hxs = HtmlXPathSelector(response)
        sample = hxs.select("//div[@id='mw-content-text']/p[1]").extract()[0]

        converter = html2text.HTML2Text()
        converter.ignore_links = True
        print(converter.handle(sample)) #Python 3 print syntax

from scrapy.spider import BaseSpider
import lxml.etree
import lxml.html

class WikiSpider(BaseSpider):
    name = "wiki_spider"
    allowed_domains = ["www.wikipedia.org"]
    start_urls = ["http://en.wikipedia.org/wiki/Python_(programming_language)"]

    def parse(self, response):
        root = lxml.html.fromstring(response.body)

        # optionally remove tags that are not usually rendered in browsers
        # javascript, HTML/HEAD, comments, add the tag names you dont want at the end
        lxml.etree.strip_elements(root, lxml.etree.Comment, "script", "head")

        # complete text
        print lxml.html.tostring(root, method="text", encoding=unicode)

        # or same as in alecxe example spider,
        # pinpoint a part of the document using XPath
        #for p in root.xpath("//div[@id='mw-content-text']/p[1]"):
        #   print lxml.html.tostring(p, method="text")

sel = Selector(text='<a href="#">Click here to go to the <strong>Next Page</strong></a>')

text_content = sel.xpath("//a[1]//text()").extract()
# which results [u'Click here to go to the ', u'Next Page']

   ' '.join(text_content)
   # Click here to go to the Next Page