python连接mongodb操作数据示例(mongodb数据库配置类)

一、相关代码
数据库配置类 MongoDBConn.py

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

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()