Python connects the mongodb operation data sample of of mongodb database configuration class

I. relevant code
Database configuration class MongoDBConn. Py

#encoding=utf-8
'''

Mongo Conn The connection class 
'''

import pymongo

class DBConn:
    conn = None
    servers = "mongodb://localhost:27017"

    def connect(self):
        self.conn = pymongo.Connection(self.servers)

    def close(self):
        return self.conn.disconnect()

    def getConn(self):
        return self.conn

MongoDemo. Py class

#encoding=utf-8
'''

Mongo operation Demo
Done:
'''
import MongoDBConn

dbconn = MongoDBConn.DBConn()
conn = None
lifeba_users = None

def process():
    # Establish a connection 
    dbconn.connect()
    global conn
    conn = dbconn.getConn()

    # list server_info information 
    print conn.server_info()

    # List all databases 
    databases = conn.database_names()
    print databases

    # Delete libraries and tables 
    dropTable()
    # Add database lifeba And table (collections)users
    createTable()
    # Insert data 
    insertDatas()
    # Update the data 
    updateData()
    # Query data 
    queryData()
    # Delete the data 
    deleteData()

    # Release the connection 
    dbconn.close()

def insertDatas():
    datas=[{"name":"steven1","realname":" test 1","age":25},
           {"name":"steven2","realname":" test 2","age":26},
           {"name":"steven1","realname":" test 3","age":23}]
    lifeba_users.insert(datas)

def updateData():
    ''' Modify only the last matched data 
            The first 3 Is set to True, Add one if the data is not found 
            The first 4 Is set to True, Multiple records are not updated 
    '''
    lifeba_users.update({'name':'steven1'},{'$set':{'realname':' test 1 Modify the '}}, False,False)

def deleteData():
    lifeba_users.remove({'name':'steven1'})

def queryData():
    # Query all data 
    rows = lifeba_users.find()
    printResult(rows)
    # Query a data 
    print lifeba_users.find_one()
    # Conditional query 
    printResult(lifeba_users.find({'name':'steven2'}))
    printResult(lifeba_users.find({'name':{'$gt':25}}))

def createTable():
    ''' Create libraries and tables '''
    global lifeba_users
    lifeba_users = conn.lifeba.users

def dropTable():
    ''' Delete table '''
    global conn
    conn.drop_database("lifeba")

def printResult(rows):
    for row in rows:
        for key in row.keys():# Through the dictionary 
            print row[key], # add ,  Print without breaking lines 
        print ''

if __name__ == '__main__':
    process()