Python操作MongoDB - 極簡教程 頂 原

Python 連接 MongoDB

安裝PyMongo模塊

pip install pymongo

使用MongoClient建立連接

from pymongo import MongoClient
# 以下爲三種建立連接的方式
#client = MongoClient()
#client = MongoClient('localhost', 27017)
#client = MongoClient('mongodb://localhost:27017/')

獲取數據庫

# 以下是兩種獲取數據庫的方式
db = client.pythondb
db = client['python-db']

獲取集合

# 以下是兩種獲取集合的方式
collection = db.python_collection
collection = db['python-collection']

上述任何命令都沒有在MongoDB服務器上實際執行任何操作。當第一個文檔插入集合時才創建集合和數據庫。

插入文檔

#!/usr/bin/python3
#coding=utf-8

import datetime
from 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,參數爲list
posts.insert_many(new_posts)

查找文檔

#!/usr/bin/python3
#coding=utf-8

import datetime
import pprint
from pymongo import MongoClient

client = MongoClient()
db = client.pythondb
posts = db.posts

# 查找單個文檔
print(posts.find_one())

# 查找多個文檔
for post in posts.find():
    print(post)

# 計數統計
print(posts.count())
print(posts.find({"author": "Maxsu"}).count())