How to use the ropgadget.loaders.elf.Elf32_Shdr_LSB.from_buffer_copy function in ROPGadget

def __setShdr(self):
        shdr_num = self.__ElfHeader.e_shnum
        base = self.__binary[self.__ElfHeader.e_shoff:]
        shdr_l = []

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

        for i in range(shdr_num):

            if self.getArchMode() == CS_MODE_32:
                if   ei_data == ELFFlags.ELFDATA2LSB: shdr = Elf32_Shdr_LSB.from_buffer_copy(base)
                elif ei_data == ELFFlags.ELFDATA2MSB: shdr = Elf32_Shdr_MSB.from_buffer_copy(base)
            elif self.getArchMode() == CS_MODE_64:
                if   ei_data == ELFFlags.ELFDATA2LSB: shdr = Elf64_Shdr_LSB.from_buffer_copy(base)
                elif ei_data == ELFFlags.ELFDATA2MSB: shdr = Elf64_Shdr_MSB.from_buffer_copy(base)

            self.__shdr_l.append(shdr)
            base = base[self.__ElfHeader.e_shentsize:]

        # setup name from the strings table
        if self.__ElfHeader.e_shstrndx != 0:
            string_table = bytes(self.__binary[(self.__shdr_l[self.__ElfHeader.e_shstrndx].sh_offset):])
            for i in range(shdr_num):
                self.__shdr_l[i].str_name = string_table[self.__shdr_l[i].sh_name:].split(b'\x00')[0].decode('utf8')