Python——MongoDB操作

pymogo

shell连接mongodb的命令mongo

$ mongo
MongoDB shell version v3.6.2
connecting to: mongodb://127.0.0.1:27017
MongoDB server version: 3.6.2
Server has startup warnings:
2018-08-05T14:29:13.960+0800 I CONTROL  [initandlisten]
2018-08-05T14:29:13.960+0800 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
2018-08-05T14:29:13.960+0800 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
2018-08-05T14:29:13.960+0800 I CONTROL  [initandlisten]

连接mongo

默认连接本地mongo

from pymongo import MongoClient
client =MongoClient()

参数形式连接mongo

client = MongoClient(host='IP', port=27017) #端口号默认为27017是数值

URI形式连接mongo

client = MongoClient('mongodb://IP:27017')

创建数据库

#创建数据库，两种方式
db = client.peopleinfo    
db = client['peopleinfo']  

连接pydb数据库

import pymongo

client = pymongo.MongoClient(host='localhost', port=27017)
db = client['pydb']

创建数据表

和数据库一样，下面两种方式都可以

t = db.stu
t = db['stu']

插入数据

stu.insert({'_id':3,'name':'mog','age':20})

修改数据

stu.update({'_id':3},{'$set':{'name':'mongo'}})

查询数据

for cur in stu.find({'age':{'$gte':20}}):
    print(cur)

删除数据

stu.delete_one({'_id':'2'})