How to use the ropgadget.loaders.elf.Elf32_Phdr_MSB.from_buffer_copy function in ROPGadget

def __setPhdr(self):
        pdhr_num = self.__ElfHeader.e_phnum
        base = self.__binary[self.__ElfHeader.e_phoff:]
        phdr_l = []

        e_ident = self.__binary[:15]
        ei_data = e_ident[ELFFlags.EI_DATA]

        for i in range(pdhr_num):
            if self.getArchMode() == CS_MODE_32:
                if   ei_data == ELFFlags.ELFDATA2LSB: phdr = Elf32_Phdr_LSB.from_buffer_copy(base)
                elif ei_data == ELFFlags.ELFDATA2MSB: phdr = Elf32_Phdr_MSB.from_buffer_copy(base)
            elif self.getArchMode() == CS_MODE_64:
                if   ei_data == ELFFlags.ELFDATA2LSB: phdr = Elf64_Phdr_LSB.from_buffer_copy(base)
                elif ei_data == ELFFlags.ELFDATA2MSB: phdr = Elf64_Phdr_MSB.from_buffer_copy(base)

            self.__phdr_l.append(phdr)
            base = base[self.__ElfHeader.e_phentsize:]