import sys
from PyQt4 import QtCore,QtGui,uic
import testui

class TestWindow (QtGui.QMainWindow):
    def __init__(self):
        QtGui.QMainWindow.__init__(self)
        self.ui = testui.Ui_MainWindow()
        self.ui.setupUi(self)
        self.show()

    @QtCore.pyqtSlot()
    def on_maxButton_clicked(self):
        print("max!")
        
app = QtGui.QApplication(sys.argv)
window = TestWindow()
sys.exit(app.exec_())