Header view when QFileSystemModel is displayed in a QTableView

[redstoneleo]

when the contents of the QFileSystemModel is displayed in a QTableView , the alignment of the text in the first row header section is right-aligned ,while the others is left-aligned,I wonder why ? enter image description here
!http://i.stack.imgur.com/ohJ9u.jpg(pic)!
how to make the alignment of the text in each header section to be left-aligned?

setDefaultSectionSize() seems doesn't work here

my code
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import sys
from PyQt4.QtGui import *
from PyQt4.QtCore import *

if name == 'main':

app =QApplication(sys.argv)      
ui =QMainWindow()   

model= QFileSystemModel ()      
model.setRootPath(QDir.currentPath())  

model.sort(3)

table = QTableView()
#print(table.verticalHeader().defaultAlignment()) #
table.verticalHeader().setDefaultAlignment(Qt.AlignRight)

table.setModel(model);   
table.setRootIndex(model.index(QDir.currentPath())) # 
ui.setCentralWidget(table)
ui.resize(800, 600)
ui.show()      
app.exec_()

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