想了解Python实现从脚本里运行scrapy的方法的相关内容吗，pythoner在本文为您仔细讲解Python从脚本里运行scrapy的相关知识和一些Code实例，欢迎阅读和指正，我们先划重点：Python,脚本,运行,scrapy，下面大家一起来学习吧。
本文实例讲述了Python实现从脚本里运行scrapy的方法。分享给大家供大家参考。具体如下：
#!/usr/bin/python
import os
os.environ.setdefault('SCRAPY_SETTINGS_MODULE', 'project.settings') #Must be at the top before other imports
from scrapy import log, signals, project
from scrapy.xlib.pydispatch import dispatcher
from scrapy.conf import settings
from scrapy.crawler import CrawlerProcess
from multiprocessing import Process, Queue
class CrawlerScript():
def __init__(self):
self.crawler = CrawlerProcess(settings)
if not hasattr(project, 'crawler'):
self.crawler.install()
self.crawler.configure()
self.items = []
dispatcher.connect(self._item_passed, signals.item_passed)
def _item_passed(self, item):
self.items.append(item)
def _crawl(self, queue, spider_name):
spider = self.crawler.spiders.create(spider_name)
if spider:
self.crawler.queue.append_spider(spider)
self.crawler.start()
self.crawler.stop()
queue.put(self.items)
def crawl(self, spider):
queue = Queue()
p = Process(target=self._crawl, args=(queue, spider,))
p.start()
p.join()
return queue.get(True)
# Usage
if __name__ == "__main__":
log.start()
"""
This example runs spider1 and then spider2 three times.
"""
items = list()
crawler = CrawlerScript()
items.append(crawler.crawl('spider1'))
for i in range(3):
items.append(crawler.crawl('spider2'))
print items
希望本文所述对大家的Python程序设计有所帮助。
