Python-сообщество

 self.list_z = QListWidget()
self.list_z.addItems(некий список)
self.list_z.setSelectionMode(2) # мультивыделение
lst_select_index = [2,5,7]
        for i in range(len(lst_select_index)):
            self.list_z.setCurrentRow(lst_select_index[i]) # выделить строку по индексу

 lst_select_index = [2,5,7]
        for i in range(len(lst_select_index)):
            self.list_z.setCurrentRow(lst_select_index[i])

 #-*-coding:utf8-*-
from PyQt4.Qt import *
from PyQt4.QtGui import *
import sys
app = QApplication(sys.argv)
l = QListWidget()
l.setSelectionMode(2)
for i in range(10):
    l.addItem('row{}'.format(i))
l.show()
lst_select_index = [2,5,7]
for i in lst_select_index:
    l.setCurrentRow(i, QItemSelectionModel.Select)
print(l.selectedItems())
app.exec_()