本文實例講述了Python使用pymongo模塊操作MongoDB的方法。分享給大家供大家參考，具體如下：

通過pymongo實現python對Mongodb的操作。

具體看python代碼

#!/usr/bin/python# coding=utf-8#python實現對MongoDB的操作#需要安裝python2、pymongo、安裝pymongo可能需要pip,logging打印日志#改腳本主要功能就是每5秒改一次mongodb中存儲的ip,5秒后再改回來import pymongoimport loggingimport datetimeimport osimport timeimport tracebackimport sys,gc# 初始化logginglogging.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 timeconsole = 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():#寫一個類，用于實例化pymongo對象以及對mongo的增刪改查  def __init__(self, user, password, host, port, database, max_pool_size=2):    try:      client = pymongo.MongoClient(host=host, port=port, maxPoolSize=max_pool_size)#實例化對象，需要mongo的相關參數      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']  #指定連接的庫        admin_db.authenticate(user, password) #身份驗證        self.persist_db = admin_db  #賦值屬性，通過該屬性執行其他操作      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，對mongodb執行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']  #鏈接fuzzing_agent.configuration表      abc=collection.find({"default_value" : "10.10.1.179"})   #執行find命令      for i in abc:        tom = i["default_value"]      if tom == "10.10.1.179":    #判斷該值是否為179,如果是則通過update改為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 expdef change_ip(mongodb_host) :  result = False  try :    mongo_util = MongoDB_Util('username', 'password', mongodb_host, 27017, 'admin',max_pool_size = 2) #用戶名，密碼，mongodb的Ip，端口，連接庫，連接池    mongo_util.update()    result = True  except :    logging.error('change_ip: Exception has occured : ' + traceback.format_exc())  finally:    return resultif __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())