dropdown menu with sub menu in pyqt4

how to create a drop down menu with sub menus that can execute an action when the element is selected? The data of the menu's are loaded from dictionary. I've tried the menu in qpushbutton but i think there's no sub menus 开发者_C百科for it. Here is an example of what i want to do, I only want the sub menus, but its too complicated for me. QPlainTextEdit With In Line Spell Check

You didn't say what did you do, but here's a simple example:

from PyQt4 import QtGui

app = QtGui.QApplication([])

menu = QtGui.QMenu()

sub_menu = QtGui.QMenu("Sub Menu")

for i in ["a", "b", "c"]: #or your dict
    sub_menu.addAction(i) #it is just a regular QMenu

menu.addMenu(sub_menu)

menu.show()

app.exec_()