[Python]操作嵌入式数据库SQLite
http://blog.csdn.net/dyx1024/article/details/7252274
去年写过一篇通过C语言操作SQLite数据库的文章《SQLITE学习笔记一(打开、操作及关闭数据库,C程序实现)》,最近在学习python,所以使用ptyhon实现了一下,实现不多描述了,代码中的注释已经非常详细了。直接贴上来。
1. 实现:
- #!/usr/bin/env python
- # -*- coding: utf-8 -*-
- #导入日志及SQLite3模块
- import logging
- import logging.config
- import sqlite3
- #日志配置文件名
- LOG_FILENAME = 'logging.conf'
- #日志语句提示信息
- LOG_CONTENT_NAME = 'sqlite_log'
- #SQLite数据库名称
- DB_SQLITE_PATH = ".\\db\\sqlite_pytest.db"
- def log_init(log_config_filename, logname):
- '''''
- Function:日志模块初始化函数
- Input:log_config_filename:日志配置文件名
- lognmae:每条日志前的提示语句
- Output: logger
- author: socrates
- date:2012-02-11
- '''
- logging.config.fileConfig(log_config_filename)
- logger = logging.getLogger(logname)
- return logger
- def operate_sqlite3_tbl_product():
- '''''
- Function:操作SQLITE3数据库函数
- Input:NONE
- Output: NONE
- author: socrates
- date:2012-02-11
- '''
- sqlite_logger.debug("operate_sqlite3_tbl_product enter...")
- #连接数据库
- try:
- sqlite_conn = sqlite3.connect(DB_SQLITE_PATH)
- except sqlite3.Error, e:
- print 'conntect sqlite database failed.'
- sqlite_logger.error("conntect sqlite database failed, ret = %s" % e.args[0])
- return
- sqlite_logger.info("conntect sqlite database(%s) succ." % DB_SQLITE_PATH)
- #获取游标
- sqlite_cursor = sqlite_conn.cursor()
- #删除表
- sql_desc2 = "DROP TABLE IF EXISTS tbl_product3;"
- try:
- sqlite_cursor.execute(sql_desc2)
- except sqlite3.Error, e:
- print 'drop table failed'
- sqlite_logger.error("drop table failed, ret = %s" % e.args[0])
- sqlite_cursor.close()
- sqlite_conn.close()
- return
- sqlite_conn.commit()
- sqlite_logger.info("drop table(tbl_product3) succ.")
- #建表
- sql_desc = '''''CREATE TABLE tbl_product3(
- i_index INTEGER PRIMARY KEY,
- sv_productname VARCHAR(32)
- );'''
- try:
- sqlite_cursor.execute(sql_desc)
- except sqlite3.Error, e:
- print 'drop table failed.'
- sqlite_logger.error("drop table failed, ret = %s" % e.args[0])
- sqlite_cursor.close()
- sqlite_conn.close()
- return
- sqlite_conn.commit()
- sqlite_logger.info("create table(tbl_product3) succ.")
- #插入记录
- sql_desc = "INSERT INTO tbl_product3(sv_productname) values('apple')"
- try:
- sqlite_cursor.execute(sql_desc)
- except sqlite3.Error, e:
- print 'insert record failed.'
- sqlite_logger.error("insert record failed, ret = %s" % e.args[0])
- sqlite_cursor.close()
- sqlite_conn.close()
- return
- sqlite_conn.commit()
- sqlite_logger.info("insert record into table(tbl_product3) succ.")
- #查询记录
- sql_desc = "SELECT * FROM tbl_product3;"
- sqlite_cursor.execute(sql_desc)
- for row in sqlite_cursor:
- print row
- sqlite_logger.info("%s", row)
- #关闭游标和数据库句柄
- sqlite_cursor.close()
- sqlite_conn.close()
- sqlite_logger.debug("operate_sqlite3_tbl_product leaving...")
- if __name__ == '__main__':
- #初始化日志系统
- sqlite_logger = log_init(LOG_FILENAME, LOG_CONTENT_NAME)
- #操作数据库
- operate_sqlite3_tbl_product()
2. 运行后的日志信息:
- [2012-02-12 12:13:52,131 sqlite_log]DEBUG: operate_sqlite3_tbl_product enter... (test_log.py:39)
- [2012-02-12 12:13:52,147 sqlite_log]INFO: conntect sqlite database(.\db\sqlite_pytest.db) succ. (test_log.py:49)
- [2012-02-12 12:13:52,147 sqlite_log]INFO: drop table(tbl_product3) succ. (test_log.py:66)
- [2012-02-12 12:13:52,240 sqlite_log]INFO: create table(tbl_product3) succ. (test_log.py:83)
- [2012-02-12 12:13:52,365 sqlite_log]INFO: insert record into table(tbl_product3) succ. (test_log.py:97)
- [2012-02-12 12:13:52,365 sqlite_log]INFO: (1, u'apple') (test_log.py:104)
- [2012-02-12 12:13:52,365 sqlite_log]DEBUG: operate_sqlite3_tbl_product leaving... (test_log.py:110)
3.通过命令行查看:
- Microsoft Windows XP [版本 5.1.2600]
- (C) 版权所有 1985-2001 Microsoft Corp.
- C:\Documents and Settings\socrates.WINXP-DUANYX>cd /d E:\Study\学习\工作程序\py_
- test\src\db
- E:\Study\学习\工作程序\py_test\src\db>sqlite3.exe sqlite_pytest.db
- SQLite version 3.7.9 2011-11-01 00:52:41
- Enter ".help" for instructions
- Enter SQL statements terminated with a ";"
- sqlite> .tables
- tbl_product3
- sqlite> select * from tbl_product3;
- 1|apple
- sqlite> .quit
- E:\Study\学习\工作程序\py_test\src\db>