pymongo insert_many 批量插入的实例
我就废话不多说了,大家还是直接看代码吧~
lt=client.fangjia.district_stat_all_0416 dl = dt.find(query) bf=[] for m in dl: bf.append(m) if len(bf)==20000: lt.insert_many(bf) bf=[] lt.insert_many(bf)
补充知识:Python操作Mongodb插入数据的两种方法:insert_one()与insert_many()
代码说明:
将mysql中table的数据插入到mongodb里
sys.setdefaultencoding('utf8') import web from pymongo import MongoClient class getPltfList(object): def __init__(self): self.db1 = web.database(dbn='mysql', db = 'episode', user = 'root', pw= 'abc111--', host = '127.0.0.1') self.db1.printing = False self.db2 = web.database(dbn='mysql', db = 'episode_soc', user = 'root', pw= 'abc111--', host = '127.0.0.1') self.db2.printing = False self.db3 = web.database(dbn='mysql', db = 'cl_episode', user = 'root', pw= 'abc111--', host = '127.0.0.1') self.db3.printing = False self.db4 = web.database(dbn='mysql', db = 'cl_episode_soc', user = 'root', pw= 'abc111--', host = '127.0.0.1') self.db4.printing = False def __call__(self): return self.createPltfList() def createPltfList(self): self.ckpltfList = list(self.db1.query('select name, ip from EPISODE_PLTF_INFO order by id DESC')) self.ckpltfList += list(self.db2.query('select name, ip from EPISODE_PLTF_INFO order by id DESC')) self.clpltfList = list(self.db3.query('select name, ip from EPISODE_PLTF_INFO order by id DESC')) self.clpltfList += list(self.db4.query('select name, ip from EPISODE_PLTF_INFO order by id DESC')) return self.ckpltfList,self.clpltfList if __name__ == '__main__' : mpList = list() flag = 0 tmp = 0 sum1 = 0 sum2 = 0 pltfList = getPltfList()() client = MongoClient("127.0.0.1", 27017) mdb = client.episode collection = mdb.pltf_basic_info # print (type(pltfList[1])) #list result= list() for pltf_my in pltfList[0]: pltf_mog = collection.find() for record in pltf_mog: IP = record.get('Cfg').get('Debug_IP') Name = record.get('Cfg').get('Register_Name') # print IP, Name if IP == pltf_my['ip'] and Name == pltf_my['name'] : flag = 1 # print IP, Name break else: flag = 0 if flag == 0 : data1 = {"Cfg" : {"Debug_IP" : pltf_my['ip'],"Register_Name":pltf_my['name'], "Site":"SH-CK"} } # print data1 result.append((data1)) # collection.insert_one(data1) # collection.delete_one(data) sum1 = sum1+1 # print len(result) # collection.insert_many(result) for pltf_my in pltfList[1]: pltf_mog = collection.find() for record in pltf_mog: IP = record.get('Cfg').get('Debug_IP') Name = record.get('Cfg').get('Register_Name') if pltf_my['ip'].encode("utf-8") == IP.encode("utf-8") and pltf_my['name'].encode("utf-8") == Name.encode("utf-8") : tmp = 1 # print IP, Name break else: tmp = 0 if tmp == 0 : data2 = {"Cfg" : {"Debug_IP":pltf_my['ip'],"Register_Name":pltf_my['name'], "Site":"SH-CL"} } # print data2 result.append((data2)) # collection.insert_one(data2) # collection.delete_one(data) sum2 = sum2+1 collection.insert_many(result) print sum1,sum2
刚开始的时候我使用的是insert_one()方法,一条一条的插入到mongodb的集合里,但是计算出的sum有出入。
在调试的过程中我发现:
注释掉 # collection.insert_one(data1) # collection.insert_one(data2)
计算出来的sum1 = 193 sum2 = 222 这是合理的,因为ck_mysql里有193条记录,cl_mysql里有234条记录,mongod里有总共有15条,但是12条是与cl_mysql重复,所以正确。
但是当我去掉注释使用 collection.insert_one(data1) collection.insert_one(data2)时,打印出的sum1=181 sum2 = 213
也就是说少了几个数据,我不知道去哪了。
想了好多办法,于是采用insert_many()的方法插入。先定义一个list(),将每个数据(数据的类型是dict)追加到list里:reslult.append(data1/data2),最后result里就会含有所有的数据,一起插入。
于是乎,问题解决了。
可是我还是很困惑insert_one()哪里出问题了!!!!!!
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