Python3实现的实现的Mysql数据库操作封装类数据库操作封装类
本文实例讲述了Python3实现的Mysql数据库操作封装类。分享给大家供大家参考，具体如下：
#encoding:utf-8
#name:mod_db.py
'''''
使用方法：1.在主程序中先实例化DB Mysql数据库操作类。
2.使用方法:db=database() db.fetch_all("sql")
'''
import MySQLdb
import MySQLdb.cursors
import mod_config
import mod_logger
DB = "database"
LOGPATH = mod_config.getConfig('path', 'logpath') + 'database.log'
DBNAME = mod_config.getConfig(DB, 'dbname')
DBHOST = mod_config.getConfig(DB, 'dbhost')
DBUSER = mod_config.getConfig(DB, 'dbuser')
DBPWD = mod_config.getConfig(DB, 'dbpassword')
DBCHARSET = mod_config.getConfig(DB, 'dbcharset')
DBPORT = mod_config.getConfig(DB, "dbport")
logger = mod_logger.logger(LOGPATH)
#数据库操作类
class database:
#注，python的self等于其它语言的this
def __init__(self, dbname=None, dbhost=None):
self._logger = logger
#这里的None相当于其它语言的NULL
if dbname is None:
self._dbname = DBNAME
else:
self._dbname = dbname
if dbhost is None:
self._dbhost = DBHOST
else:
self._dbhost = dbhost
self._dbuser = DBUSER
self._dbpassword = DBPWD
self._dbcharset = DBCHARSET
self._dbport = int(DBPORT)
self._conn = self.connectMySQL()
if(self._conn):
self._cursor = self._conn.cursor()
#数据库连接
def connectMySQL(self):
conn = False
try:
conn = MySQLdb.connect(host=self._dbhost,
user=self._dbuser,
passwd=self._dbpassword,
db=self._dbname,
port=self._dbport,
cursorclass=MySQLdb.cursors.DictCursor,
charset=self._dbcharset,
)
except Exception,data:
self._logger.error("connect database failed, %s" % data)
conn = False
return conn
#获取查询结果集
def fetch_all(self, sql):
res = ''
if(self._conn):
try:
self._cursor.execute(sql)
res = self._cursor.fetchall()
except Exception, data:
res = False
self._logger.warn("query database exception, %s" % data)
return res
def update(self, sql):
flag = False
if(self._conn):
try:
self._cursor.execute(sql)
self._conn.commit()
flag = True
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