import sqlite3class DBManager():def __init__(self):self.db = sqlite3.connect("core.db")self.query = self.db.cursor()  ...self._initTable()...## Create table["webpower"] if not existsdef _initTable(self):self.query.execute("create table if not exists webpower (id integer primary key,name TEXT,state integer)")self.db.commit()...

 1 from PyQt4.QtSql import QSqlQuery,QSqlDatabase
 2
 3 class DBManager():
 4     def __init__(self):
 5         self.db = QSqlDatabase.addDatabase("QSQLITE") #select database type
 6         self.db.setDatabaseName("core.db") # set database name
 7         self.db.open()  #connect to or create database
 8         self.query = QSqlQuery() #sql handler
 9         ...
10
11     ...

from PyQt4.QtSql import QSqlQuery,QSqlDatabaseclass DBManager():def __init__(self):self.db = QSqlDatabase.addDatabase("QMYSQL")  #select database typeself.db.setHostName("localhost")  #set addressself.db.setUserName("root"); #set user nameself.db.setPassword("root"); #set user pwdself._trytoConnect() #check connectionself.query = QSqlQuery()## create databaseself.query.exec_("CREATE DATABASE test1")## Choose databaseself.db.setDatabaseName("test1")self._trytoConnect()#also can be :self.query.exec_("USE test1")## Connect and check connection statedef _trytoConnect(self):if (self.db.open()):     print "Success"else:print "Failed to connect to mysql"...

--create table
create table if not exists test2 (id integer primary key,time real,powers real);--clear table
delete from test2;--insert
insert into t1 values(1,0.1,0.2);--select
select * from test1--delete table
drop table test4