Id希望解析页面，然后将某些项目导出到一个csv文件，而其他导出到另一文件： 使用Feed导出here，我设法对一个文件进行了如下操作：
设置
FEED_EXPORT_FIELDS = (
'url',
'group_url',
'name',
'streetAddress',
'city',
'addressCountry',
)
FEED_FORMAT = 'csv'
FEED_URI = 'output/%(name)s_%(time)s.csv'
但是正如我所说的，上述仅导出到一个csv文件。 我希望能够将其他字段抓取到另一个文件：
FEED_EXPORT_FIELDS = (
'employee',
'employee_group',
）
我的刮板解析器：
def parse(self, response):
l = BasicItemLoader(item=ProductItemLoader(), response=response)
l.default_input_processor = MapCompose(lambda v: v.strip(), replace_escape_chars)
# l.default_output_processor = Compose(TakeFirst())
l.add_value('url', response.request.url)
l.add_value('group_url', response.meta.get('section', ''))
l.add_css('name', 'h1[itemprop="name"]::text')
l.add_css('streetAddress', "div[itemprop=\"address\"] [itemprop=\"streetAddress\"]::text")
l.add_css('city', "div[itemprop=\"address\"]>p::text")
l.add_css('addressCountry', "div[itemprop=\"address\"] [itemprop=\"addressCountry\"]::text")
l.add_css('phone', ".phoneCompany>input[id*='freePhone']::attr(value)", TakeFirst())
l.add_css('summary', 'span[itemprop="description"]::text')
l.add_xpath('year', "//td[contains(text(),'Year established')]/following-sibling::td/text()")
l.add_xpath('registry', "//td[contains(text(),'Registry of commerce')]/following-sibling::td/text()")
l.add_xpath('legal_form', "//td[contains(text(),'Legal form')]/following-sibling::td/text()")
l.add_xpath('vat', "//td[contains(text(),'VAT')]/following-sibling::td/text()")
l.add_xpath('fax', "//td[contains(text(),'Fax')]/following-sibling::td/text()")
l.add_css('website', "[id*='webSite_presentation_']::text")
l.add_css('brands', "#company-tradenames .tradeName::text")
l.add_xpath('banks', "//h3[contains(text(),'Banks')]/following-sibling::div//strong/text()")
l.add_css('export_area', "#exportZones>span:nth-of-type(2)::text")
l.add_css('import_area', "#importZones>span:nth-of-type(2)::text")
l.add_css('export_countries', "#exportCountries>span:nth-of-type(2)::text")
l.add_css('import_countries', "#importCountries>span:nth-of-type(2)::text")
l.add_css('employees', ".employees.bloc .effectif p::text")
l.add_css('turn_over', ".turnover.bloc li:nth-of-type(1)>p:nth-of-type(2)::text")
return l.load_item()
和项目定义
class ProductItemLoader(scrapy.Item):
url = scrapy.Field()
group_url = scrapy.Field()
name = scrapy.Field()
streetAddress = scrapy.Field()
addressCountry = scrapy.Field()
city = scrapy.Field()
phone = scrapy.Field()
summary = scrapy.Field()
year = scrapy.Field()
registry = scrapy.Field()
legal_form = scrapy.Field()
vat = scrapy.Field()
fax = scrapy.Field()
website = scrapy.Field()
brands = scrapy.Field()
banks = scrapy.Field()
import_area = scrapy.Field()
import_countries = scrapy.Field()
export_area = scrapy.Field()
export_countries = scrapy.Field()
employees = scrapy.Field()
turn_over = scrapy.Field()
答案 0 :(得分：0)
您将必须使用项目定义来实现将不同的字段保存到自己的csv文件中。
items.py:
import scrapy
class ProductItemLoader(scrapy.Item):
url = scrapy.Field()
group_url = scrapy.Field()
name = scrapy.Field()
streetAddress = scrapy.Field()
addressCountry = scrapy.Field()
city = scrapy.Field()
phone = scrapy.Field()
summary = scrapy.Field()
year = scrapy.Field()
registry = scrapy.Field()
legal_form = scrapy.Field()
vat = scrapy.Field()
class EmployeeLoader(scrapy.Item):
fax = scrapy.Field()
website = scrapy.Field()
brands = scrapy.Field()
banks = scrapy.Field()
import_area = scrapy.Field()
import_countries = scrapy.Field()
export_area = scrapy.Field()
export_countries = scrapy.Field()
employees = scrapy.Field()
turn_over = scrapy.Field()
pipelines.py:
from scrapy.exporters import CsvItemExporter
from scrapy import signals
from pydispatch import dispatcher
def item_type(item):
# The CSV file names are used (imported) from the scrapy spider.
return type(item)
class YourSitePipelineHere(object):
# For simplicity, I'm using the same class def names as found in the,
# main scrapy spider and as defined in the items.py
fileNamesCsv = ['ProductItemLoader','EmployeeLoader']
def __init__(self):
self.files = {}
self.exporters = {}
dispatcher.connect(self.spider_opened, signal=signals.spider_opened)
dispatcher.connect(self.spider_closed, signal=signals.spider_closed)
def spider_opened(self, spider):
self.files = dict([ (name, open("/projec_name"+name+'.csv','wb')) for name in self.fileNamesCsv ])
for name in self.fileNamesCsv:
self.exporters[name] = CsvItemExporter(self.files[name])
if name == 'ProductItemLoader':
self.exporters[name].fields_to_export = ['url','group_url','name','streetAddress','addressCountry','city','phone','summary','year','registry','legal_form','vat']
self.exporters[name].start_exporting()
if name == 'EmployeeLoader':
self.exporters[name].fields_to_export = ['fax','website','brands','bank','import_area','import_countries','export_area','export_countries','employees','turn_over']
self.exporters[name].start_exporting()
def spider_closed(self, spider):
[e.finish_exporting() for e in self.exporters.values()]
[f.close() for f in self.files.values()]
def process_item(self, item, spider):
typesItem = item_type(item)
if typesItem in set(self.fileNamesCsv):
self.exporters[typesItem].export_item(item)
return item
NeilR
答案 1 :(得分：0)
#items.py
import scrapy
class JnuItem(scrapy.Item):
date = scrapy.Field()
title = scrapy.Field()
link = scrapy.Field()
#pipelines.py
from itemadapter import ItemAdapter
from scrapy.exporters import CsvItemExporter
class SeminarPipeline:
def __init__(self):
self.file = None
def open_spider(self,spider):
self.files={}
def close_spider(self,spider):
for exporter in self.files.values():
exporter.finish_exporting()
def file_name (self,item):
adopter = ItemAdapter(item)
title = adopter['title']
string = str(title).lower()
if 'webinar' in string:
exporter = CsvItemExporter(open('webinar7.csv', 'ab'), include_headers_line=False)
exporter.fields_to_export = ['date', 'title','link' ]
exporter.start_exporting()
self.files['webinar']=exporter
return self.files['webinar']
elif 'workshop' in string:
exporter = CsvItemExporter(open('workshop7.csv', 'ab'), include_headers_line=False)
exporter.fields_to_export = ['date', 'title', 'link']
exporter.start_exporting()
self.files['workshop'] = exporter
return self.files['workshop']
elif 'conference' in string:
exporter = CsvItemExporter(open('conference7.csv', 'ab'), include_headers_line=False)
exporter.fields_to_export = ['date', 'title', 'link']
exporter.start_exporting()
self.files['conference'] = exporter
return self.files['conference']
def process_item(self, item, spider):
exporter = self.file_name(item)
exporter.export_item(item)
return item
#settings.py
ITEM_PIPELINES = {'seminar.pipelines.SeminarPipeline': 300,}