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.pythondb db = client['python-db']
获取集合
# 以下是两种获取集合的方式collection = db.python_collection collection = 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 MongoClient
client = MongoClient()
db = client.pythondb
posts = db.posts
post = {"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 MongoClient
client = MongoClient()
db = client.pythondb
posts = 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())
