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

 1 # -*- coding: utf-8 -*-
 2 import pymongo
 3 
 4 # Define your item pipelines here
 5 #
 6 # Don't forget to add your pipeline to the ITEM_PIPELINES setting
 7 # See: https://docs.scrapy.org/en/latest/topics/item-pipeline.html
 8 
 9 
10 class ScrapyDoubanMongoPipeline(object):
11 
12     def open_spider(self, spider):
13         self.conn = pymongo.MongoClient(host='localhost', port=27017)
14         self.db = self.conn.douban_movie
15         # self.db = self.conn['douban_movie']
16         self.movies = self.db.movies
17 
18     def process_item(self, item, spider):
19         self.movies.insert(
20             {
21                 "title":item['title'],
22                 "score":item['score'],
23                 "rank":item['rank'],
24                 "abstract":item['abstract'],
25                 "describe":item['describe'],
26             }
27         )
28 
29     def close_spider(self, spider):
30         self.conn.close()