1

我使用scrapy从几个亚洲网站上抓取一些东西。其中一些使用 utf8 编码。但其他一些使用不同的,如“gb2312”。

我编写自己的输出语句而不是管道和项目。这是yelp餐厅评论的scrapy代码,它有效:

from scrapy.spider import BaseSpider
from scrapy.selector import HtmlXPathSelector
#from crawlsite.items import ReviewItem
import re

class ReviewSpider(BaseSpider):
    name = "yelp"
    allowed_domains = ['yelp.com']
    start_urls = ['http://www.yelp.com/biz/providence-los-angeles-2']

    #call back function when received response
    def parse(self, response):
        hxs = HtmlXPathSelector(response)

        stars = hxs.select('//meta[@itemprop="ratingValue"]/@content').extract()
        review = hxs.select('//p[@itemprop="description"]').extract()

        url = response.url
        date = hxs.select('//meta[@itemprop="datePublished"]/@content').extract()
        user = hxs.select('//li[@class="user-name"]/a/text()').extract()

        file = open('crawled.xml', 'a')

        starting = str(url)[55:]

        startingid = 0
        if starting.isdigit():
            startingid = int(starting)

        id = 0
        while id < 40:
            file.write('\n<doc id="%s">\n' % str(id + 1 + startingid))
            #the first stars rating is the overall rating
            file.write('\t<stars>%s</stars>\n' % stars[id+1])
            file.write('\t<url>\n\t%s\n\t</url>\n' % url)
            file.write('\t<date>%s</date>\n' % date[id])

            #user can be unicode as well
            file.write('\t<user>%s</user>\n' % user[id].encode('utf8'))
            #there is no title for yelp reviews
            file.write('\t<title>NULL</title>\n')

            #need to stripe the review
            file.write('\t<review>\n\t')
            review[id] = re.sub('<[^<]+?>', '', review[id])
            file.write(review[id].encode('utf8'))
            file.write('\n\t</review>\n')


            star = stars[id+1]
            polarity = "NULL"
            confidence = "NULL"

            file.write('\t<polarity>%s</polarity>\n' % polarity)
            file.write('\t<confidence>%s</confidence>\n' % confidence)




            file.write('</doc>\n')
            id += 1

        file.close()

请注意,有些评论包含法语或西班牙语单词,但它们都在 'utf8' 中,

file.write(review[id].encode('utf8'))

这是使用不同编码抓取亚洲网站的代码:

    allowed_domains = ['duanwenxue.com']
    start_urls = ['http://www.duanwenxue.com/article/113415.html']


def parse(self, response):
        hxs = HtmlXPathSelector(response)

        content = hxs.select('//div[@class="content-in-similar"]/p/text()').extract();

        file = open('crawled.xml', 'a')

        file.write(str(content).decode('GB2312'))

        file.close()

输出文件是这样的:

[u'\u4e00\u5927\u5b66\u751f\u88ab\u654c\u4eba\u6293\u4e86\uff0c\u654c\u4eba\u628a\u4ed6\u7ed1\u5728\u4e86\u7535\u7ebf\u6746\u4e0a\uff0c\u7136\u540e\u95ee\u4ed6\uff1a\u8bf4\uff0c\u4f60\u662f\u54ea\u91cc\u7684\uff1f\u4e0d\u8bf4\u5c31\u7535\u6b7b\u4f60\uff01\u5927\u5b66\u751f\u56de\u4e86\u654c\u4eba\u4e00\u53e5\u8bdd\uff0c\u7ed3\u679c\u

我使用w3c检查编码,应该是正确的。我试过 str(content).decode('GB2312').encode('utf8') 和类似的组合,它们都不起作用。

4

1 回答 1

2

您应该使用您希望输出文件的任何编码unicode.encode将内容从unicode对象转换为对象。str使用您的示例内容:

>>> content = [u'\u4e00\u5927\u5b66\u751f\u88ab\u654c\u4eba\u6293\u4e86\uff0c\u654c\u4eba\u628a\u4ed6\u7ed1\u5728\u4e86\u7535\u7ebf\u6746\u4e0a\uff0c\u7136\u540e...']
>>> print content[0]
一大学生被敌人抓了,敌人把他绑在了电线杆上,然后...
>>> content_utf8 = content[0].encode('utf8')
>>> content_utf8[:10]
'\xe4\xb8\x80\xe5\xa4\xa7\xe5\xad\xa6\xe7'
>>> print content_utf8
一大学生被敌人抓了,敌人把他绑在了电线杆上,然后...

然后您可以打开文件并编写 str 对象(content_utf8在上面的代码中)。

于 2013-06-17T11:27:56.823 回答