##mongoDB connect with python

###Pre-request:

1. Has mongo installed and running.
2. Has pymongo instaled with pip

###To connect

from pymongo import MongoClient
c = MongoClient()

That's it! dead simple -- but you may need to make sure that mongo is running on the default port-- 27017

python和mongo的连接出乎意料的简单。

需要的只是一个pymongo中的MongoClient来建立一个live connection！而且最赞的是，由于是nosql，根本不需考虑collection已有的数据是什么类型，key，schema什么的，直接统统insert。之前和relational sql连接的时候（postgres）则需要考虑原来的table里面的PK有没有重复，id是否要被maintain成incremental，之类的问题~炒鸡方便！

To manipulate mongodb within python

1. to access specific database

   db = c['effy_db']

2. to access specific collection

   cl = db['effy_collection']

db, collection acts like a dict in python! it actually is. When a live connection is established, database object becomes a dictionary with key equals to its name and value equals the object itself.

To access mongo shell command for absolute beginners, see the blog.