pyqt4连接sqlite数据库并通过qtableview显示出来

from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.Qtsql import *
import sys

db=QsqlDatabase.addDatabase("QsqlITE")
db.setDatabaseName('./a.db')
if db.open():
 print "db is open"
 
class FF(QDialog):
 def __init__(self,parent=None):
 super(FF,self).__init__(parent)
 self.resize(300,300)
 
 self.model=QsqlTableModel(self)
 self.model.setTable("user")
 self.model.setHeaderData(0,Qt.Horizontal,QVariant("xuhao"))
 self.model.setHeaderData(1,QVariant("content"))
 self.model.select()

 self.view=QTableView(self)
 self.view.resize(300,300)
 self.view.setModel(self.model)
 self.view.resizeColumnsToContents()
 #基类是qmainwindow是用这个方法添加
 #self.setCentralWidget(self.view)
 


 query=QsqlQuery()
 query.exec_("select * from user")
 if query.next():
 print query.value(1).toString()
 

 
app=QApplication(sys.argv)
f=FF()
f.show()
app.exec_()