pymongo串連MongoDB

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導語

pymongo 是目前用的相對普遍一個python用來串連MongoDB的庫，是工作中各種基本需求都能滿足
具體api可以參考

pymongo API
pymongo github

安裝 MongoDB

為了測試pyMongo串連mongodb，首先當然需要在centos下安裝mongo，詳細參考Centos下安裝MongoDB

安裝 pymongo

如果沒有pip， 建議先安裝，至於為啥要用pip你懂得

yum install python-pip

 

pip 安裝 pymongo

pip install pymongo

 

查看 pymongo是否安裝成功

[email protected]/4 $ pythonPython 2.7.5 (default, Nov 20 2015, 02:00:19) [GCC 4.8.5 20150623 (Red Hat 4.8.5-4)] on linux2Type "help", "copyright", "credits" or "license" for more information.>>> import pymongo        >>> pymongo.version‘3.2.2‘

 

使用 pymongo串連到 MongoDB

有兩種方式，等同

>>> client = pymongo.MongoClient(‘192.168.100.3‘, 27017)>>> print clientMongoClient(host=[‘192.168.100.3:27017‘], document_class=dict, tz_aware=False, connect=True)>>> client2 = pymongo.MongoClient(‘mongodb://192.168.100.3:27017/‘)>>> print client2MongoClient(host=[‘192.168.100.3:27017‘], document_class=dict, tz_aware=False, connect=True)>>>

 

得到 db 和 collection

有時候在指令碼中會把 db 和 collection 作為參數使用，可以參考第二種方式

直接連結

>>> db = client.report>>> print dbDatabase(MongoClient(host=[‘192.168.100.3:27017‘], document_class=dict, tz_aware=False, connect=True), u‘report‘)>>> collection = db.source_register>>> print collectionCollection(Database(MongoClient(host=[‘192.168.100.3:27017‘], document_class=dict, tz_aware=False, connect=True), u‘report‘), u‘source_register‘)>>>

 

參數連結， 這種形式又有兩種方法

## 定義參數>>> pramadb = ‘report‘>>> pramacoll = ‘source_register‘## get db >>> db2 = client[pramadb]>>> db3 = client.get_database(pramadb)>>> print db2Database(MongoClient(host=[‘192.168.100.3:27017‘], document_class=dict, tz_aware=False, connect=True), u‘report‘)>>> print db3Database(MongoClient(host=[‘192.168.100.3:27017‘], document_class=dict, tz_aware=False, connect=True), u‘report‘)>>> ## get collection >>> coll2 = db2[pramacoll]>>> coll3 = db3.get_collection(pramacoll)>>> print coll2Collection(Database(MongoClient(host=[‘192.168.100.3:27017‘], document_class=dict, tz_aware=False, connect=True), u‘report‘), u‘source_register‘)>>> print coll3Collection(Database(MongoClient(host=[‘192.168.100.3:27017‘], document_class=dict, tz_aware=False, connect=True), u‘report‘), u‘source_register‘)>>>

 

常規操作舉例

## insert or save >>> mydict = {"name":"James", "age": 28}>>> collection.save(mydict)ObjectId(‘57fdf212bcd34f48c4fce15a‘)## find>>> collection.find({"name":"James"})[0]{u‘age‘: 28, u‘_id‘: ObjectId(‘57fdf212bcd34f48c4fce15a‘), u‘name‘: u‘James‘}>>>

 

pymongo串連MongoDB