QGIS project macro

from qgis.utils import iface
from qgis.core import Qgis
from qgis.PyQt.QtCore import QUrl
from qgis.PyQt.QtWidgets import QAction, QMenu
from qgis.PyQt.QtGui import QIcon, QDesktopServices


URL='https://www.vevey.ch'
IMG=':/images/themes/default/mActionContextHelp.png'
MENU_TITLE="Gestion des ports"
TOOLTIP="Aide pour la gestion des ports"

def openProject():
    action = QAction(QIcon(IMG), TOOLTIP, iface.mainWindow())
    action.setToolTip(TOOLTIP)
    action.triggered.connect(lambda: QDesktopServices.openUrl(QUrl(URL)))

    # add toolbar button and menu item
    iface.addToolBarIcon(action)

    menu = QMenu( "&"+MENU_TITLE, iface.mainWindow().menuBar() )
    menu.addAction(action)
    actions = iface.mainWindow().menuBar().actions()
    menu_action = iface.mainWindow().menuBar().insertMenu( actions[-1], menu )

    Qgis.__my_menu = menu_action
    Qgis.__my_action = action


def saveProject():
    pass

def closeProject():
    iface.mainWindow().menuBar().removeAction(Qgis.__my_menu)
    iface.removeToolBarIcon(Qgis.__my_action)