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api_sqlite3.py
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api_sqlite3.py
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#!/usr/bin/env python
# -*- coding:utf-8 -*-
# author: justinli.ljt@gmail.com
# date: 2013-11-05
import sys,os
import time
import traceback
import sqlite3
import config
from lib.logger_service import logger
class Sqlite3(object):
'''
'''
def __init__(self):
self._db_file = config.DB_PATH
self._sql_create_tables = config.SQL_CREATE_TABLES
self._create_db()
pass
def _create_db(self):
ret = False
try:
conn = sqlite3.connect(self._db_file)
logger.info('db file - "%s"' % (self._db_file))
c = conn.cursor()
for k in self._sql_create_tables:
c.execute(self._sql_create_tables[k])
conn.commit()
logger.info('create table "%s"' % (k))
conn.close()
ret = True
except Exception, e:
logger.error(traceback.format_exc())
logger.error(str(e))
logger.error('create table fail')
return ret
logger.info('create table ok')
return ret
def execute(self, sql):
ret = False
rec_list = []
try:
conn = sqlite3.connect(self._db_file)
c = conn.cursor()
c.execute(sql)
conn.commit()
logger.info('execute - "%s"' % (sql))
rec_list = c.fetchall()
logger.info('retrive - %d records - "%s"' % (len(rec_list), str(rec_list)))
conn.close()
ret = True
except Exception, e:
logger.error(traceback.format_exc())
logger.error(str(e))
logger.error('execute sql fail - "%s"' % (sql))
return ret, rec_list
return ret, rec_list
def test(self):
print self.execute('select * from t_price_history limit 10')
pass
def query_history(self, history_length, file_path):
price_list = []
ret, data = self.execute('select price from t_price_history order by updatetime desc limit %d' % (history_length))
if not ret:
logger.error('query history fail')
return ret
for item in data:
price_list.append(str(int(item[0])))
price_list.reverse()
fp = open(file_path, 'w')
fp.write('\r\n'.join(price_list))
fp.close()
logger.info('query history dump latest %d price data to file "%s"' % (history_length, file_path))
return ret
pass
def main():
sqlite3 = Sqlite3()
#sqlite3.test()
#sqlite3.query_history(60/10*60*24, 'price_history_data.txt')
pass
if __name__ == '__main__':
main()