mysql - python开发web service 中数据库链接和释放应该怎么处理？
用tornado开发web service服务。服务端根据接收到的json数据对mysql数据库进行查询，并把结果反馈给用户。采用sqlalchemy对数据库进行操作，以下对数据库链接的创建，释放是否合理呢？
class db:
def __init__(self,db_ip='',db_name='',db_user='',db_pass='',db_charset=''):
self.db_str = 'mysql+pymysql://'+db_user+':'+db_pass+'@'+db_ip+':3306/'+db_name+'?'+'charset='+db_charset
self.engine = create_engine(self.db_str, encoding='utf-8', echo=False)
self.dbsession = sessionmaker(bind=self.engine)
def return_dbsession(self):
return self.dbsession
def close_session(self):
self.session.close()database = db(db_ip='127.0.0.1', db_name='data_utf', db_user='root', db_pass='root', db_charset='utf8')处理post请求代码如下
class rcvRequest(tornado.web.Request):
session = scoped_session(database.return_dbsession())()
response = []
for ctt in session.query(table).filter(table.ID == id):
response.append(ctt)
self.write(str(response))
session.close()
