QtCore.QObject.connect(self.pushButton, QtCore.SIGNAL("clicked()"),	self.test)

from PyQt4 import QtCore, QtGui
class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(450, 617)
        self.centralwidget = QtGui.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.listWidget = QtGui.QListWidget(self.centralwidget)
        self.listWidget.setGeometry(QtCore.QRect(10, 10, 221, 551))
        self.listWidget.setToolTip("")
        self.listWidget.setObjectName("listWidget")
        
        QtGui.QListWidgetItem(self.listWidget)
        QtGui.QListWidgetItem(self.listWidget)
        QtGui.QListWidgetItem(self.listWidget)
        QtGui.QListWidgetItem(self.listWidget)
        self.pushButton = QtGui.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(240, 20, 101, 27))
        self.pushButton.setObjectName("pushButton")
        
        QtCore.QObject.connect(self.pushButton, QtCore.SIGNAL("clicked()"),	self.test) # это всё, что смог сделать
        
        self.pushButton_2 = QtGui.QPushButton(self.centralwidget)
        self.pushButton_2.setGeometry(QtCore.QRect(350, 20, 91, 27))
        self.pushButton_2.setObjectName("pushButton_2")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtGui.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 450, 25))
        self.menubar.setObjectName("menubar")
        self.menu675 = QtGui.QMenu(self.menubar)
        self.menu675.setObjectName("menu675")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtGui.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)
        self.action7686 = QtGui.QAction(MainWindow)
        self.action7686.setObjectName("action7686")
        self.action = QtGui.QAction(MainWindow)
        self.action.setObjectName("action")
        self.menu675.addAction(self.action7686)
        self.menu675.addAction(self.action)
        self.menubar.addAction(self.menu675.menuAction())
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)
    def test(self):
		print 'test'
		
    def retranslateUi(self, MainWindow):
        MainWindow.setWindowTitle(QtGui.QApplication.translate("MainWindow", "MainWindow", None, QtGui.QApplication.UnicodeUTF8))
        __sortingEnabled = self.listWidget.isSortingEnabled()
        self.listWidget.setSortingEnabled(False)
        self.listWidget.item(0).setText(QtGui.QApplication.translate("MainWindow", "xfh", None, QtGui.QApplication.UnicodeUTF8))
        self.listWidget.item(1).setText(QtGui.QApplication.translate("MainWindow", "dfj", None, QtGui.QApplication.UnicodeUTF8))
        self.listWidget.item(2).setText(QtGui.QApplication.translate("MainWindow", "wea", None, QtGui.QApplication.UnicodeUTF8))
        self.listWidget.item(3).setText(QtGui.QApplication.translate("MainWindow", "fnk", None, QtGui.QApplication.UnicodeUTF8))
        self.listWidget.setSortingEnabled(__sortingEnabled)
        self.pushButton.setText(QtGui.QApplication.translate("MainWindow", "Установить", None, QtGui.QApplication.UnicodeUTF8))
        self.pushButton_2.setText(QtGui.QApplication.translate("MainWindow", "Удалить", None, QtGui.QApplication.UnicodeUTF8))
        self.menu675.setTitle(QtGui.QApplication.translate("MainWindow", "Справка", None, QtGui.QApplication.UnicodeUTF8))
        self.action7686.setText(QtGui.QApplication.translate("MainWindow", "О программе", None, QtGui.QApplication.UnicodeUTF8))
        self.action.setText(QtGui.QApplication.translate("MainWindow", "Как пользоваться", None, QtGui.QApplication.UnicodeUTF8))
if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    MainWindow = QtGui.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

def test(self):
    for item in self.listWidget.selectedItems():
        print item.text()