求助这串代码的实现原理

sw546190767

1. #-*- encoding:utf-8 -*-
   
2. import pymongo
   
3. import datetime
   
4. import time
   
5. import json
   
6. from pymongo import MongoClient
   
7. 
   
8. 
   
9. 
   
10. def GetDB():
    
11.     with open('workspace/confs/demo.conf' , 'r') as f:
    
12.        json_obj = json.load(f)
    
13.        mongoStr = json_obj['dbmanager0']['mongo']
    
14.        # print mongoStr
    
15.        DBname = str(mongoStr['db'])
    
16.        DBuser = str(mongoStr['user'])
    
17.        DBpass = str(mongoStr['pwd'])
    
18.        DBip = str(mongoStr['ip']) + ":" + str(mongoStr['port'])
    
19.        return DBname,DBuser,DBpass,DBip
    
20. 
    
21. def CreateConnection(DBname , DBuser , DBpass , DBip):
    
22.     Mongo = 'mongodb://'+DBip+'/'
    
23.     client = MongoClient(Mongo)#创建数据库连接
    
24.     db = client[DBname]     #创建DBname数据库的连接
    
25.     db.authenticate(DBuser,DBpass)      #连接数据库使用的账户和密码
    
26.     # print db.collection_names()
    
27.     tableName = db.collection_names()
    
28.     return db,client,tableName
    
29. 
    
30. def DeleteTable(a,b):
    
31.     db = a
    
32.     array1 = b
    
33.     # print array1
    
34.     for i in array1:
    
35.         if i != 'system.indexes':
    
36.             # print i
    
37.             db[i].remove()
    
38. 
    
39. 
    
40. 
    
41. if __name__ == '__main__':
    
42.     DBname , DBuser , DBpass , DBip = GetDB()
    
43.     db , client ,tableName = CreateConnection(DBname , DBuser , DBpass , DBip)
    
44.     DeleteTable(db,tableName)
    
45.     print 'Success'

复制代码

hldh214

从 demo.conf 拿到数据库连接参数
连接数据库并获取表名

http://api.mongodb.com/python/2.5/tutorial.html#inserting-a-document

删除表

sw546190767

谢谢您回答，可是我想知道的每一串代码的作用