How to use the ropgadget.gadgets.Gadgets function in ROPGadget

def __getGadgets(self):
        if self.__checksBeforeManipulations() == False:
            return False

        G = Gadgets(self.__binary, self.__options, self.__offset)
        execSections = self.__binary.getExecSections()

        # Find ROP/JOP/SYS gadgets
        self.__gadgets = []
        for section in execSections:
            section = self._sectionInRange(section)
            if not section: continue
            if not self.__options.norop: self.__gadgets += G.addROPGadgets(section)
            if not self.__options.nojop: self.__gadgets += G.addJOPGadgets(section)
            if not self.__options.nosys: self.__gadgets += G.addSYSGadgets(section)

        # Pass clean single instruction and unknown instructions
        self.__gadgets = G.passClean(self.__gadgets, self.__options.multibr)

        # Delete duplicate gadgets
        if not self.__options.all: