<code python>
#!/usr/bin/env python

from PyQt4 import QtCore, QtGui
import sys

def start () :
    app = QtGui.QApplication (sys.argv)
    win = QtGui.QMainWindow ()
    win.show ()
    app.exec_ ()


start ()
</code>

<code python>
#!/usr/bin/env python

from PyQt4 import QtCore, QtGui
import sys

class MainWin (QtGui.QMainWindow):
    def __init__ (self, parent=None):
        QtGui.QMainWindow.__init__ (self, parent)

        fileMenu = self.menuBar().addMenu ("&File")

        toolbar = self.addToolBar ("tools")
        toolbar.setMovable (True)
        toolbar.setIconSize (QtCore.QSize (16, 16))

        act = QtGui.QAction ("&Open", self)
        act.setIcon (QtGui.QIcon ("icons/green_page.xpm"))
        act.setToolTip ("Open file")
        fileMenu.addAction (act)
        toolbar.addAction (act)


def start () :
    app = QtGui.QApplication (sys.argv)
    win = MainWin ()
    win.show ()
    app.exec_ ()


start ()
</code>

<code python>
#!/usr/bin/env python

from PyQt4 import QtCore, QtGui
import sys

class MainWin (QtGui.QMainWindow):
    def __init__ (self, parent=None):
        QtGui.QMainWindow.__init__ (self, parent)

        fileMenu = self.menuBar().addMenu ("&File")

        toolbar = self.addToolBar ("tools")
        toolbar.setMovable (True)
        toolbar.setIconSize (QtCore.QSize (16, 16))

        self.setStatusBar (QtGui.QStatusBar ())
        
        act = QtGui.QAction ("&Open", self)
        act.setIcon (QtGui.QIcon ("icons/green_page.xpm"))
        act.setToolTip ("Open file")
        act.setStatusTip ("Otevri nejaky soubor")
        fileMenu.addAction (act)
        toolbar.addAction (act)

        tv = QtGui.QTreeWidget ()
        self.setCentralWidget (tv)

        ti = QtGui.QTreeWidgetItem (tv)
        ti.setText (0, "first item")

        ti = QtGui.QTreeWidgetItem (tv)
        ti.setText (0, "second item")
        
        ti2 = QtGui.QTreeWidgetItem (ti)
        ti2.setText (0, "third item")


def start () :
    app = QtGui.QApplication (sys.argv)
    win = MainWin ()
    win.show ()
    app.exec_ ()


start ()
</code>

<code python>
#!/usr/bin/env python

from PyQt4 import QtCore, QtGui
import sys

class MainWin (QtGui.QMainWindow):
    def __init__ (self, parent=None):
        QtGui.QMainWindow.__init__ (self, parent)

        fileMenu = self.menuBar().addMenu ("&File")

        toolbar = self.addToolBar ("tools")
        toolbar.setMovable (True)
        toolbar.setIconSize (QtCore.QSize (16, 16))

        self.setStatusBar (QtGui.QStatusBar ())
        
        act = QtGui.QAction ("&Open", self)
        act.setIcon (QtGui.QIcon ("icons/green_page.xpm"))
        act.setToolTip ("Open file")
        act.setStatusTip ("Otevri nejaky soubor")
        self.connect (act, QtCore.SIGNAL ("triggered()"), fileOpen)
        fileMenu.addAction (act)
        toolbar.addAction (act)

        tv = QtGui.QTreeWidget ()
        self.setCentralWidget (tv)

        ti = QtGui.QTreeWidgetItem (tv)
        ti.setText (0, "first item")

        ti = QtGui.QTreeWidgetItem (tv)
        ti.setText (0, "second item")
        
        ti2 = QtGui.QTreeWidgetItem (ti)
        ti2.setText (0, "third item")
        ti2.setToolTip (0, "third item")
        ti2.setIcon (0, QtGui.QIcon ("icons/yellow_box.xpm"))
    
def fileOpen () :
    fileName = QtGui.QFileDialog.getOpenFileName (win, "Open File", ":scan")


def start () :
    app = QtGui.QApplication (sys.argv)
    global win
    win = MainWin ()
    win.show ()
    app.exec_ ()


start ()
</code>