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get dbname from date and dbname , According to the monthly

Project description

Control_DB_date
=======

适合场景是 数据库因为量大,根据日期切分成不同的库,该模块会根据你提供的时间段,调度到不同的数据库,可扩展不同的IP地址调度......

当时是为了实现ES库的中心调度,加了层tornado的api,为不同client提供不同的策略。实现的方法还是有些粗糙,有时间在进一步的改进一下... ...

.. image:: http://img3.douban.com/view/biz/raw/public/f477075ba610e94.jpg
:height: 240px
:width: 300 px

Install from Pypi
-----------------

pip install Control_DB_date


Basic Example
-------------
#coding:utf-8
from datetime import datetime
from datetime import timedelta
import time

class Match_db_date(object):
"""
Match = Match_db_date()
import json
print json.dumps(Match.to_match('2014-01-11','2014-08-22'))
"""
def getMonthDays(self, year, month ):
day = 31
while day:
try:
time.strptime( '%s-%s-%d'%( year, month, day ), '%Y-%m-%d' )
return day
except:
day -= 1

def fit_date_format(self,year,month):
if month<10:
str_db = "buzz_v1_%s0%s"%(year,month)
else:
str_db = "buzz_v1_%s%s"%(year,month)
return str_db

def to_match(self,start,end):
dc = {}
opt_start_time = datetime.strptime(start,"%Y-%m-%d")
opt_end_time = datetime.strptime(end,"%Y-%m-%d")
count_month = opt_end_time.month - opt_start_time.month
if count_month == 0:
"""buzz_v1_201502"""
str_db = "buzz_v1_%s"%opt_start_time.strftime('%Y%m')
dc[str_db] = [start,end]
return dc

for i in range(0,count_month+1):
if i == 0:
year = opt_start_time.year
month = opt_start_time.month
dc[self.fit_date_format(year,month)] = [start,"%s-%s-%s"%(year,month,self.getMonthDays(year,month))]

elif i == count_month:
year = opt_end_time.year
month = opt_end_time.month
day = opt_end_time.month
dc[self.fit_date_format(year,month)] = ["%s-%s-01"%(year,month),end]

else:
year = opt_start_time.year
month = opt_start_time.month+i
if month<=12:
dc[self.fit_date_format(year,month)] = ["%s-%s-01"%(year,month),"%s-%s-%s"%(year,month,self.getMonthDays(year,month) )]
else:
year = month / 12 + year
month = month % 12
dc[self.fit_date_format(year,month)] = ["%s-%s-01"%(year,month),"%s-%s-%s"%(year,month,getMonthDays(year,month))]

return dc


How to use it
-------------
from Control_DB_date import *
Match = Match_db_date()
Match.to_match('2014-05-11,'2014-09-11')

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