如何在此代码中使用按钮触发PyQt中的操作？

Question

我想使用push butthon（＆＃39; series_search_pushButton＆＃39;）来触发类Ui_series_search（）中的另一个窗口。坚持尝试这样做。

class Ui_series_search(object):
    def setupUi(self, series_search):
        #codes

    def retranslateUi(self, series_search):
        #codes


class HomePage(object):
    def setupUi(self, MainWindow):
        self.series_search_pushButton = QtGui.QPushButton(self.tab_series)

        self.series_search_pushButton.setObjectName(_fromUtf8("
                               series_search_pushButton"))

    def retranslateUi(self, MainWindow):
        codes


if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    MainWindow = QtGui.QMainWindow()
    ui = Homepage()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())