Python操作MongoDB

Python 连接 MongoDB

安装PyMongo模块

pip install pymongo

使用MongoClient建立连接

from pymongo import MongoClient# 以下为三种建立连接的方式#client = MongoClient()#client = MongoClient('localhost', 27017)#client = MongoClient('mongodb://localhost:27017/')

获取数据库

# 以下是两种获取数据库的方式db = client.pythondbdb = client['python-db']

获取集合

# 以下是两种获取集合的方式collection = db.python_collectioncollection = db['python-collection']

上述任何命令都没有在MongoDB服务器上实际执行任何操作。当第一个文档插入集合时才创建集合和数据库。

插入文档

#!/usr/bin/python3#coding=utf-8import datetimefrom pymongo import MongoClientclient = MongoClient()db = client.pythondbposts = db.postspost = {"author": "Maxsu",         "text": "My first blog post!",         "tags": ["mongodb", "python", "pymongo"],         "date": datetime.datetime.utcnow()}posts.insert(post)# 批量插入,参数为listposts.insert_many(new_posts)

查找文档

#!/usr/bin/python3#coding=utf-8import datetimeimport pprintfrom pymongo import MongoClientclient = MongoClient()db = client.pythondbposts = db.posts# 查找单个文档print(posts.find_one())# 查找多个文档for post in posts.find():    print(post)# 计数统计print(posts.count())print(posts.find({"author": "Maxsu"}).count())