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【记录】爬取CHILDES中的字幕和音视频文件

Scrapy crifan 382浏览 0评论

根据需求,需要去爬取:

Eng-NA Corpora

Bilingual Corpora

中,对应的内容的:

字幕,去掉各种标注的

音频,如果有

视频,如果有

参考之前自己的:

【记录】用Python的Scrapy去爬取Youtube中Humf的字幕

去操作:

<code>➜  childes git:(master) ✗ /Users/crifan/dev/dev_root/company/naturling/projects/crawler_projects
➜  crawler_projects git:(master) ll
total 8
-rw-r--r--  1 crifan  staff   187B  3 21 14:01 README.md
drwxr-xr-x  8 crifan  staff   256B  3 21 13:58 scrapyYoutubeSubtitleHumf
➜  crawler_projects git:(master) scrapy startproject scrapyChildes
New Scrapy project 'scrapyChildes', using template directory '/usr/local/lib/python2.7/site-packages/scrapy/templates/project', created in:
    /Users/crifan/dev/dev_root/company/naturling/projects/crawler_projects/scrapyChildes

You can start your first spider with:
    cd scrapyChildes
    scrapy genspider example example.com
➜  crawler_projects git:(master) ✗ cd scrapy
cd: no such file or directory: scrapy
➜  crawler_projects git:(master) ✗ cd scrapyChildes
➜  scrapyChildes git:(master) ✗ ll
total 8
-rw-r--r--  1 crifan  staff   270B  3 22 15:41 scrapy.cfg
drwxr-xr-x  8 crifan  staff   256B  3 22 15:41 scrapyChildes
➜  scrapyChildes git:(master) ✗ cd scrapyChildes
➜  scrapyChildes git:(master) ✗ scrapy genspider Childes https://childes.talkbank.org/access/Eng-NA/
Created spider 'Childes' using template 'basic' in module:
  scrapyChildes.spiders.Childes
</code>

然后初始化后是:

然后就可以继续去写代码了

然后用:

<code># -*- coding: utf-8 -*-
import scrapy
from urllib import urlencode, unquote
import re
import json
from bs4 import BeautifulSoup
import os

class ChildesSpider(scrapy.Spider):
    name = 'Childes'
    allowed_domains = ['talkbank.org']
    start_urls = [
        # https://childes.talkbank.org/access/Eng-NA/
        'https://childes.talkbank.org/access/Eng-NA/Bliss.html',
        'https://childes.talkbank.org/access/Eng-NA/Bloom70.html',
        'https://childes.talkbank.org/access/Eng-NA/Bohannon.html',
        'https://childes.talkbank.org/access/Eng-NA/Braunwald.html',
        'https://childes.talkbank.org/access/Eng-NA/Brown.html',
        'https://childes.talkbank.org/access/Eng-NA/Carterette.html',
        'https://childes.talkbank.org/access/Eng-NA/Clark.html',
        'https://childes.talkbank.org/access/Eng-NA/Cornell.html',
        'https://childes.talkbank.org/access/Eng-NA/Demetras1.html',
        'https://childes.talkbank.org/access/Clinical-MOR/EllisWeismer.html',
        'https://childes.talkbank.org/access/Eng-NA/Garvey.html',
        'https://childes.talkbank.org/access/Eng-NA/Gathercole.html',
        'https://childes.talkbank.org/access/Clinical-MOR/Gillam.html',
        'https://childes.talkbank.org/access/Eng-NA/Gleason.html',
        'https://childes.talkbank.org/access/Eng-NA/Hall.html',
        'https://childes.talkbank.org/access/Eng-NA/HSLLD.html',
        'https://childes.talkbank.org/access/Eng-NA/Kuczaj.html',
        'https://childes.talkbank.org/access/Eng-NA/MacWhinney.html',
        'https://childes.talkbank.org/access/Eng-NA/McCune.html',
        'https://childes.talkbank.org/access/Eng-NA/McMillan.html',
        'https://talkbank.org/access/ASDBank/English/Nadig.html',
        'https://childes.talkbank.org/access/Eng-NA/Nelson.html',
        'https://childes.talkbank.org/access/Clinical-MOR/Nicholas/NH.html',
        'https://childes.talkbank.org/access/Eng-NA/Peters.html',
        'https://phonbank.talkbank.org/access/Eng-NA/Providence.html',
        'https://childes.talkbank.org/access/Clinical-MOR/Rondal/Normal.html',
        'https://childes.talkbank.org/access/Eng-NA/Sachs.html',
        'https://childes.talkbank.org/access/Eng-NA/Sawyer.html',
        'https://childes.talkbank.org/access/Eng-NA/Snow.html',
        'https://childes.talkbank.org/access/Eng-NA/Sprott.html',
        'https://childes.talkbank.org/access/Eng-NA/Suppes.html',
        'https://childes.talkbank.org/access/Eng-NA/Tardif.html',
        'https://childes.talkbank.org/access/Eng-NA/VanHouten.html',
        'https://childes.talkbank.org/access/Eng-NA/VanKleeck.html',
        'https://childes.talkbank.org/access/Eng-NA/Warren.html',
        'https://childes.talkbank.org/access/Eng-NA/Weist.html',
        'https://childes.talkbank.org/access/Clinical-MOR/Feldman/Narrative.html',
        'https://childes.talkbank.org/access/Clinical-MOR/Feldman/ParentChild.html',
        'https://childes.talkbank.org/access/Clinical-MOR/Feldman/Twins.html',

        # https://childes.talkbank.org/access/Biling/
        'https://childes.talkbank.org/access/Biling/Singapore.html',

        # https://childes.talkbank.org/access/Eng-UK/
        'https://childes.talkbank.org/access/Eng-UK/Belfast.html',
        'https://childes.talkbank.org/access/Eng-UK/Cruttenden.html',
        'https://childes.talkbank.org/access/Eng-UK/Fletcher.html',
        'https://childes.talkbank.org/access/Eng-UK/Forrester.html',
        'https://childes.talkbank.org/access/Eng-UK/Gathburn.html',
        'https://childes.talkbank.org/access/Eng-UK/Lara.html',
        'https://childes.talkbank.org/access/Eng-UK/Manchester.html',
        'https://childes.talkbank.org/access/Eng-UK/MPI-EVA-Manchester.html',
        'https://childes.talkbank.org/access/Eng-UK/Thomas.html',
        'https://childes.talkbank.org/access/Eng-UK/Tommerdahl.html',
        'https://childes.talkbank.org/access/Eng-UK/Wells.html',

    ]

    outputRootFolder = "output"


    def jsonToStr(self, jsonDict, indent=2):
        return json.dumps(jsonDict, indent=indent, ensure_ascii=False)

    def saveToFile(self, filename, content, folder=outputRootFolder, suffix=".html"):
        if not os.path.exists(folder):
            os.makedirs(folder)

        filename = filename + suffix
        fullFilename = folder + "/" + filename # 'output/Eng-NA/Bliss/Bliss.html'
        with open(fullFilename, 'wb') as f:
            f.write(content)

    def saveHtml(self, response):
        respUrl = response.url
        self.logger.info("respUrl=%s", respUrl) # https://childes.talkbank.org/access/Eng-NA/Bliss.html
        htmlData = response.body
        htmlFilename = respUrl.split("/")[-1] # 'Bliss.html'
        self.logger.info("htmlFilename=%s", htmlFilename)
        saveFolder = self.extractSaveFolerFromUrl(respUrl)
        self.logger.info("saveFolder=%s", saveFolder) # 'Eng-NA/Bliss'
        saveFolder = self.outputRootFolder + "/" + saveFolder
        self.logger.info("saveFolder=%s", saveFolder) # 'output/Eng-NA/Bliss'
        self.saveToFile(htmlFilename, htmlData, folder=saveFolder, suffix="")

    def extractSaveFolerFromUrl(self, url):
        groupAndFilename = None

        foundProupAndFilename = re.search(r'talkbank\.org/access/(?P&lt;groupAndFilename&gt;[\w\-/]+)\.html$', url)
        if foundProupAndFilename:
            groupAndFilename = foundProupAndFilename.group("groupAndFilename") # 'Eng-NA/Bliss'
            self.logger.info("groupAndFilename=%s", groupAndFilename)
        else:
            self.logger.warning("can not find ground and file name from url: %s", url)

        return groupAndFilename

    def parse(self, response):
        self.saveHtml(response=response)
</code>

已经可以下载到html了:

现在需要去提取,找出对应的:

<code>&lt;p&gt;
  &lt;a href="/browser/index.php?url=Eng-NA/Bliss/"&gt; Browsable transcripts &lt;/a&gt;
&lt;/p&gt;
</code>

的部分。

即:

如何通过scrapy中,查找a的href的值是/browser/index.php?url开头的,或者是a的值包含Browsable transcripts

所以去搜:

scrapy find by value

scrapy – How can we extract particular elements value by using xpath when element value is different for each element – Stack Overflow

选择器(Selectors) — Scrapy 0.24.6 文档

去试试xpath,好像用contains之类的函数是可以实现的

然后通过调试:

<code>scrapy shell
fetch("https://childes.talkbank.org/access/Eng-NA/Bliss.html")
</code>

是可以找到的:

<code>&gt;&gt;&gt; response.xpath('//p/a[starts-with(@href, "/browser/index.php?url=")]')
[&lt;Selector xpath='//p/a[starts-with(@href, "/browser/index.php?url=")]' data=u'&lt;a href="/browser/index.php?url=Eng-NA/B'&gt;]
&gt;&gt;&gt; response.xpath('//p/a[contains(text(), "Browsable transcripts")]')
[&lt;Selector xpath='//p/a[contains(text(), "Browsable transcripts")]' data=u'&lt;a href="/browser/index.php?url=Eng-NA/B’&gt;]
&gt;&gt;&gt; response.xpath('//p/a[contains(text(), "Browsable transcripts")]').xpath('@href').extract()
[u'/browser/index.php?url=Eng-NA/Bliss/']
</code>

所以可以用代码去继续处理了。

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