classes in python inherit
now inherit
import pymongo
class MongodbPipeline(object):
def __init__(self, mongodbHost, mongodbPort,mongodbName, mongondbCollection):
self.mongodbHost = mongodbHost
self.mongodbPort = mongodbPort
self.mongodbName = mongodbName
self.mongodbCollection = mongondbCollection
def from_crawler(cls, crawler):
return cls(mongodbHost=crawler.settings.get("MONGODB_HOST"), mongodbPort=crawler.settings.get("MONGODB_PORT"),
mongodbName=crawler.settings.get("XIAOMIQUAN_DBNAME"),
mongondbCollection=crawler.settings.get("XIAOMIQUAN_COLLECTION"))
def open_spider(self, spider):
self.client = pymongo.MongoClient(self.mongodbHost, self.mongodbPort)
self.mongodb = self.Client[self.mongodbName]
self.db = self.mongodb[self.mongondbCollection]these three methods, except that the dbname and dbcollection of the database are different, and the others are all the same. Now how to inherit the three methods in the subclass
this is written in the initialization of the subclass
def __init__(self, mongodbHost, mongodbPort, mongodbName, mongondbCollection):
super(XiaoMiQuanPipeline, self).__init__(mongodbHost, mongodbPort, mongodbName, mongondbCollection)