本文实例讲述了Python使用pymongo模块操作MongoDB的方法。分享给大家供大家参考，具体如下：
通过pymongo实现python对Mongodb的操作。
具体看python代码
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#!/usr/bin/python
# coding=utf-8
#python实现对MongoDB的操作
#需要安装python2、pymongo、安装pymongo可能需要pip,logging打印日志
#改脚本主要功能就是每5秒改一次mongodb中存储的ip,5秒后再改回来
import pymongo
import logging
import datetime
import os
import time
import traceback
import sys,gc
# 初始化logging
logging.basicConfig(level=logging.NOTSET,
format='%(asctime)s %(filename)s[line:%(lineno)d] [%(levelname)s] %(message)s',
datefmt='%Y-%m-%d %H:%M:%S',
filename='clear_screenshot_based_on_db.log',
filemode='a')
# set to print log to console at the same time
console = logging.StreamHandler()
console.setLevel(logging.NOTSET)
formatter = logging.Formatter('%(asctime)s %(name)s [%(levelname)s] %(message)s')
console.setFormatter(formatter)
logging.getLogger('').addHandler(console)
class MongoDB_Util():
#写一个类，用于实例化pymongo对象以及对mongo的增删改查
def __init__(self, user, password, host, port, database, max_pool_size=2):
try:
client = pymongo.MongoClient(host=host, port=port, maxPoolSize=max_pool_size)
#实例化对象，需要mongo的相关参数
if client == None:
logging.error(
"MongoDB_Util.__init__ : Initialize mongodb client object error,host:%s port:%s" % (
host, port))
raise Exception("Initialize mongodb client object error")
try:
admin_db = client['admin'] #指定连接的库
admin_db.authenticate(user, password) #身份验证
self.persist_db = admin_db #赋值属性，通过该属性执行其他操作
except Exception as exp:
logging.error(
"MongoDB_Util.__init__ : Authtication failed,host:%s port:%s database:%s user:%s password:%s" %
(host, port, database, user, password))
raise exp
except Exception as exp:
logging.error(
"MongoDB_Util.__init__ : Exception has occured : %s" % str(sys.exc_info()[1]))
raise exp
def update(self):
#update方法，对mongodb执行update操作
tom = None
try:
if self.persist_db == None:
logging.error('MongoDB_Util.delete : Persist object has not been initialised')
raise Exception('Persist object has not been initialised')
collection = self.persist_db['fuzzing_agent.configuration'] #链接fuzzing_agent.configuration表
abc=collection.find({"default_value" : "10.10.1.179"}) #执行find命令
for i in abc:
tom = i["default_value"]
if tom == "10.10.1.179":
#判断该值是否为179,如果是则通过update改为134
collection.update({"default_value" : "10.10.1.179"},
{'$set':{'default_value': '10.10.1.134'}})
collection.update({"default_value" : "10.10.1.179:/run/media/root/disk01/fuzzing"},
{'$set':{"default_value" :"10.10.1.134:/run/media/root/disk01/fuzzing"}})
logging.debug("179 > 134")
time.sleep(5)
else:
collection.update({"default_value" : "10.10.1.134"},
{'$set':{'default_value': '10.10.1.179'}})
collection.update({"default_value" : "10.10.1.134:/run/media/root/disk01/fuzzing"},
{'$set':{"default_value" :"10.10.1.179:/run/media/root/disk01/fuzzing"}})
logging.debug("134 > 179")
time.sleep(5)
return
except Exception as exp:
logging.error('Mongodb_Util.delete : Exception has occured : ' + str(sys.exc_info()[1]))
raise exp
def change_ip(mongodb_host) :
result = False
try :
mongo_util = MongoDB_Util('username', 'password', mongodb_host, 27017, 'admin',max_pool_size = 2) #用户名，密码，mongodb的Ip，端口，连接库，连接池
mongo_util.update()
result = True
except :
logging.error('change_ip: Exception has occured : ' + traceback.format_exc())
finally:
return result
if __name__ == '__main__' :
while True :
try :
if change_ip(mongodb_host = '127.0.0.1') :
#mongodb的ip地址
logging.debug('update is done !!!')
else :
logging.error('not update done')
except :
logging.error('main : Exception has occured : ' + traceback.format_exc())
finally:
logging.debug("one loop %s" %datetime.datetime.now())
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希望本文所述对大家Python程序设计有所帮助。
原文链接：http://www.cnblogs.com/ArmoredTitan/p/Mongodb.html