python - Create submenu in PyQt -


i have simple code menu in pyqt, problem doesn't show submenu. want show while hovering on "more". wrong?

class menu(qtgui.qmenu):     def __init__(self, parent=none):         qtgui.qmenu.__init__(self, "menu", parent)         sub_menu = qtgui.qmenu("sub menu")          icon = qtgui.qicon.fromtheme("edit-paste")         item = qtgui.qaction(icon, "more", self)         self.addaction(item)          icon = qtgui.qicon.fromtheme("edit-copy")         item = qtgui.qaction(icon, "submenu item 1", self)         item.triggered.connect(self.function)         sub_menu.addaction(item)          icon = qtgui.qicon.fromtheme("edit-copy")         item = qtgui.qaction(icon, "submenu item 2", self)         item.triggered.connect(self.function)         sub_menu.addaction(item)          self.addmenu(sub_menu)          icon = qtgui.qicon.fromtheme("close")         item = qtgui.qaction(icon, "&exit", self)         item.triggered.connect(self.quit_f)         self.addaction(item)      def function(self):         qtgui.qmessagebox.about(self.parent(), "about", "test")      def quit_f(self):         sys.exit(0)

you must provide parent when create submenu:

sub_menu = qtgui.qmenu("sub menu", parent=self) ... self.addmenu(sub_menu)



note: alternative, more concise way create submenus:

sub_menu = self.addmenu("sub menu")

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