custom model + PyQt4

[wirasto]

I want create my custom model. But i confused with the code.

I want set text aligment some column and if in a cell have value =0, cell will color red.

#!/usr/bin/env python
 
from PyQt4.QtCore import * 
from PyQt4.QtGui import *
from PyQt4.QtSql import * 
 
class myModel(QSqlQueryModel):
    def __init__(self, parent=None):
	QSqlQueryModel.__init__(self)
 
    def data(self, index, role):
	?????

#!/usr/bin/env python

from PyQt4.QtCore import * 
from PyQt4.QtGui import *
from PyQt4.QtSql import * 

class myModel(QSqlQueryModel):
    def __init__(self, parent=None):
	QSqlQueryModel.__init__(self)

    def data(self, index, role):
	?????

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Sorry, my englis is bad