Python操作MongoDB

安装 pymongo 模块

　　conda/pip install pymongo

使用步骤

　　创建数据库连接

　　　　pymongo.MongoClient(host='localhost', port=27017)

　　　　　　本地ip：localhost

　　　　　　默认端口：27017

　　获得数据库对象

　　　　数据库连接.数据库名称

　　获得 collection 对象

　　　　数据库名称.collection名称

 

爬取豆瓣Top250信息并保存到MongoDB

# -*- coding: utf-8 -*-
import pymongo

# Define your item pipelines here
#
# Don't forget to add your pipeline to the ITEM_PIPELINES setting
# See: https://docs.scrapy.org/en/latest/topics/item-pipeline.html


class ScrapyDoubanMongoPipeline(object):

    def open_spider(self, spider):
        self.conn = pymongo.MongoClient(host='localhost', port=27017)
        self.db = self.conn.douban_movie
        # self.db = self.conn['douban_movie']
        self.movies = self.db.movies

    def process_item(self, item, spider):
        self.movies.insert(
            {
                "title":item['title'],
                "score":item['score'],
                "rank":item['rank'],
                "abstract":item['abstract'],
                "describe":item['describe'],
            }
        )

    def close_spider(self, spider):
        self.conn.close()