Antialiasing PNG resize in Qt?

In a PyQt based GUI program, I'm drawing a few PNG file as QPixmap after resize. So here is basically what happens:

bitmap = QPixmap( "foo.png" )
bitmap.scaleToHeight(38) # original is larger than this
scene.addItem(QGraphicsPixmapItem(bitmap)) # Add to graphics scene

The problem i开发者_StackOverflow社区s: afterwards, the bitmap is rather ugly. Is there a way to do this in a antialiasing way?

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See the documentation.

bitmap = bitmap.scaledToHeight(38, Qt.SmoothTransformation)