python连接mongodb

一、相关代码

数据库配置类 MongoDBConn.py

复制代码代码如下:

#encoding=utf-8

'''

Mongo Conn连接类

'''

import pymongo

class DBConn:

conn = None

servers = "mongodb://localhost:27017"

def connect(self):

self.conn = pymongo.Connection(self.servers)

def close(self):

return self.conn.disconnect()

def getConn(self):

return self.conn

MongoDemo.py 类

复制代码代码如下:

#encoding=utf-8

'''

Mongo操作Demo

Done:

'''

import MongoDBConn

dbconn = MongoDBConn.DBConn()

conn = None

lifeba_users = None

def process():

#建立连接

dbconn.connect()

global conn

conn = dbconn.getConn()

#列出server_info信息

print conn.server_info()

#列出全部数据库

databases = conn.database_names()

print databases

#删除库和表

dropTable()

#添加数据库lifeba及表(collections)users

createTable()

#插入数据

insertDatas()

#更新数据

updateData()

#查询数据

queryData()

#删除数据

deleteData()

#释放连接

dbconn.close()

def insertDatas():

datas=[{"name":"steven1","realname":"测试1","age":25},

{"name":"steven2","realname":"测试2","age":26},

{"name":"steven1","realname":"测试3","age":23}]

lifeba_users.insert(datas)

def updateData():

'''只修改最后一条匹配到的数据

第3个参数设置为True,没找到该数据就添加一条

第4个参数设置为True,有多条记录就不更新

'''

lifeba_users.update({'name':'steven1'},{'$set':{'realname':'测试1修改'}}, False,False)

def deleteData():

lifeba_users.remove({'name':'steven1'})

def queryData():

#查询全部数据

rows = lifeba_users.find()

printResult(rows)

#查询一个数据

print lifeba_users.find_one()

#带条件查询

printResult(lifeba_users.find({'name':'steven2'}))

printResult(lifeba_users.find({'name':{'$gt':25}}))

def createTable():

'''创建库和表'''

global lifeba_users

lifeba_users = conn.lifeba.users

def dropTable():

'''删除表'''

global conn

conn.drop_database("lifeba")

def printResult(rows):

for row in rows:

for key in row.keys():#遍历字典

print row[key], #加, 不换行打印

print ''

if __name__ == '__main__':

process()