scrapy

来源： https://stackoverflow.com/questions/63212796/why-is-scrapy-splash-not-sending-correct-url

来源： https://stackoverflow.com/questions/62670277/scrapy-user-agents-unsupportedbrowsertype-warning

来源： https://stackoverflow.com/questions/63563676/how-to-trigger-a-js-asp-net-next-page-event-using-scrapy

来源： https://stackoverflow.com/questions/27408880/scrapy-how-to-run-two-crawlers-one-after-another

来源： https://stackoverflow.com/questions/27408880/scrapy-how-to-run-two-crawlers-one-after-another

问题 have this code who run scrapy crawler from script(http://doc.scrapy.org/en/latest/topics/practices.html#run-scrapy-from-a-script). But it doesn't work. from twisted.internet import reactor from scrapy.crawler import Crawler from scrapy import log,signals from spiders.egov import EgovSpider from scrapy.utils.project import get_project_settings def run(): spider =EgovSpider() settings = get_project_settings() crawler = Crawler(settings) crawler.signals.connect(reactor.stop, signal=signals

问题 Is it possible to make scrapy write to CSV files with not more than 5000 rows in each one? How can I give it a custom naming scheme? Am I supposed to modify CsvItemExporter ? 回答1: Try this pipeline: # -*- coding: utf-8 -*- # Define your item pipelines here # # Don't forget to add your pipeline to the ITEM_PIPELINES setting # See: http://doc.scrapy.org/en/latest/topics/item-pipeline.html from scrapy.exporters import CsvItemExporter import datetime class MyPipeline(object): def __init__(self,

问题 Is it possible to make scrapy write to CSV files with not more than 5000 rows in each one? How can I give it a custom naming scheme? Am I supposed to modify CsvItemExporter ? 回答1: Try this pipeline: # -*- coding: utf-8 -*- # Define your item pipelines here # # Don't forget to add your pipeline to the ITEM_PIPELINES setting # See: http://doc.scrapy.org/en/latest/topics/item-pipeline.html from scrapy.exporters import CsvItemExporter import datetime class MyPipeline(object): def __init__(self,

问题 The default order in scrapy is alphabet,i have read some post to use OrderedDict to output item in customized order. I write a spider follow the webpage. How to get order of fields in Scrapy item My items.py. import scrapy from collections import OrderedDict class OrderedItem(scrapy.Item): def __init__(self, *args, **kwargs): self._values = OrderedDict() if args or kwargs: for k, v in six.iteritems(dict(*args, **kwargs)): self[k] = v class StockinfoItem(OrderedItem): name = scrapy.Field()

问题 The default order in scrapy is alphabet,i have read some post to use OrderedDict to output item in customized order. I write a spider follow the webpage. How to get order of fields in Scrapy item My items.py. import scrapy from collections import OrderedDict class OrderedItem(scrapy.Item): def __init__(self, *args, **kwargs): self._values = OrderedDict() if args or kwargs: for k, v in six.iteritems(dict(*args, **kwargs)): self[k] = v class StockinfoItem(OrderedItem): name = scrapy.Field()