scrapy自定义pipeline类实现将采集数据保存到mongodb的方法
本文实例讲述了scrapy自定义pipeline类实现将采集数据保存到mongodb的方法。分享给大家供大家参考。具体如下：
#StandardPythonlibraryimports
#3rdpartymodules
importpymongo
fromscrapyimportlog
fromscrapy.confimportsettings
fromscrapy.exceptionsimportDropItem
classMongoDBPipeline(object):
def__init__(self):
self.server=settings['MONGODB_SERVER']
self.port=settings['MONGODB_PORT']
self.db=settings['MONGODB_DB']
self.col=settings['MONGODB_COLLECTION']
connection=pymongo.Connection(self.server,self.port)
db=connection[self.db]
self.collection=db[self.col]
defprocess_item(self,item,spider):
err_msg=''
forfield,datainitem.items():
ifnotdata:
err_msg+='Missing%sofpoemfrom%s\n'%(field,item['url'])
iferr_msg:
raiseDropItem(err_msg)
self.collection.insert(dict(item))
log.msg('ItemwrittentoMongoDBdatabase%s/%s'%(self.db,self.col),
level=log.DEBUG,spider=spider)
returnitem
希望本文所述对大家的python程序设计有所帮助。