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

print 'pyqt', PYQT_VERSION_STR, 'with qt', qVersion()

class Window(QListWidget):
    def __init__(self, *args):
        QListWidget.__init__(self, *args)
        for i in range(200):
            QListWidgetItem(str(i), self).setHidden(i % 3 != 0)
        self.show()

app = QApplication([])
w = Window()
app.exec_()