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python operation mongodb

巴扎黑
巴扎黑Original
2016-12-03 11:11:551472browse

import pymongo,sys 
from pymongo import MongoClient 
client = MongoClient(host="localhost:27017",read_preference=pymongo.read_preferences.ReadPreference.PRIMARY_PREFERRED)
db = client.database 
db.authenticate("database","passwd") 

1.search 
pi = db.locinfo.find({"con":p}) #search 
pi = db.locinfo.find_one({"con":p}) 
print pi 
{u'city': u'u56feu6728u8212u514bu5e02', u'wid': u'101130908', u'zip': u'843900', u'pro': u'u65b0u7586u7ef4u543eu5c14u81eau6cbbu533a', u'wkey': u'u56feu6728u8212u514bu5e02', u'acode': u'0998', u'_id': u'txpcx5', u'fix': True, u'con': u'u56feu6728u8212u514bu5e02'} 


2.update 
db.locinfo.update({"con":p},{'$set':{"con":zc}}) # update one item 
×××××××××××××××批量update ××× multi=True   ×××××××××××××××××××××××××××××××× 
db.locinfo.update({"con":lon},{'$set':{"wkey": sht }},multi=True) #ok,# update multiple items 
×××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××× 

3。insert  # 插入数组,及一般字符窜 
db.wbinfo.insert({"city":cityname,"jiaojing":[jiaojing],"lukuang":"lukuang,"}) 

4。push 、 pop  插入数组,删除数组元素 
db.wbinfo.update({"city":"六安市"},{'$push':{"jiaojing":"two","lukuang":"lk"}}) 
db.wbinfo.update({"city":"六安市"},{'$pop':{"jiaojing":"two","lukuang":"lk"}}) 

5. 正则查询 
res = db.devices.find({'$and':[{'stats.devcaps':{'$exists':True}},{'stats.fwver':{'$regex':'.*N91|N92.*'}}]})  # stats.fwver 字段包含字符 'N91' 或者 'N92' 

6.字典 
if devcap.has_key('dev') and devcap.has_key('cap'): 

7. 
python操作mongodb根据_id查询数据的代码 
ObjectId pymongo python 
如果pymongo的版本号小于2.2,使用下面的语句导入ObjectId 
from pymongo.objectid import ObjectId 

如果pymongo的版本号大于2.2,则使用下面的语句 
from bson.objectid import ObjectId 
查询代码如下: 
collection.find_one({'_id':ObjectId('50f0d76347f4ec148890ef1e')}) 

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