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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _add_view_menu(self):
 """ Create a default View menu that shows 'Enter Full Screen'. """

        mainMenu = self.app.mainMenu()

        # Create an View menu and make it a submenu of the main menu
        viewMenu = AppKit.NSMenu.alloc().init()
        viewMenu.setTitle_(localization["cocoa.menu.view"])
        viewMenuItem = AppKit.NSMenuItem.alloc().init()
        viewMenuItem.setSubmenu_(viewMenu)
        mainMenu.addItem_(viewMenuItem)

        # TODO: localization of the Enter fullscreen string has no effect
        fullScreenMenuItem = viewMenu.addItemWithTitle_action_keyEquivalent_(localization["cocoa.menu.fullscreen"], "toggleFullScreen:", "f")
        fullScreenMenuItem.setKeyEquivalentModifierMask_(AppKit.NSControlKeyMask | AppKit.NSCommandKeyMask)