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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 prepare_for_submission(self, folder):
 """Create the input files from the input nodes passed to this instance of the `CalcJob`. :param folder: an `aiida.common.folders.Folder` to temporarily write files on disk :return: `aiida.common.datastructures.CalcInfo` instance """

        # create input structure
        if 'structure' in self.inputs:
            self.inputs.structure.export(folder.get_abs_path(self._DEFAULT_COORDS_FILE_NAME), fileformat="xyz")

        # create cp2k input file
        inp = Cp2kInput(self.inputs.parameters.get_dict())
        inp.add_keyword("GLOBAL/PROJECT", self._DEFAULT_PROJECT_NAME)
        if 'structure' in self.inputs:
            for i, letter in enumerate('ABC'):
                inp.add_keyword('FORCE_EVAL/SUBSYS/CELL/' + letter,
                                '{:<15} {:<15} {:<15}'.format(*self.inputs.structure.cell[i]))
            topo = "FORCE_EVAL/SUBSYS/TOPOLOGY"
            inp.add_keyword(topo + "/COORD_FILE_NAME", self._DEFAULT_COORDS_FILE_NAME)
            inp.add_keyword(topo + "/COORD_FILE_FORMAT", "XYZ")

        with io.open(folder.get_abs_path(self._DEFAULT_INPUT_FILE), mode="w", encoding="utf-8") as fobj:
            fobj.write(inp.render())

        if 'settings' in self.inputs:
            settings = self.inputs.settings.get_dict()
        else:
            settings = {}

        # create code info
        codeinfo = CodeInfo()
        codeinfo.cmdline_params = settings.pop('cmdline', []) + ["-i", self._DEFAULT_INPUT_FILE]
        codeinfo.stdout_name = self._DEFAULT_OUTPUT_FILE
        codeinfo.join_files = True
        codeinfo.code_uuid = self.inputs.code.uuid

        # create calc info
        calcinfo = CalcInfo()
        calcinfo.stdin_name = self._DEFAULT_INPUT_FILE
        calcinfo.uuid = self.uuid
        calcinfo.cmdline_params = codeinfo.cmdline_params
        calcinfo.stdin_name = self._DEFAULT_INPUT_FILE
        calcinfo.stdout_name = self._DEFAULT_OUTPUT_FILE
        calcinfo.codes_info = [codeinfo]

        # file lists
        calcinfo.remote_symlink_list = []
        if 'file' in self.inputs:
            calcinfo.local_copy_list = []
            for fobj in self.inputs.file.values():
                calcinfo.local_copy_list.append((fobj.uuid, fobj.filename, fobj.filename))

        calcinfo.remote_copy_list = []
        calcinfo.retrieve_list = [self._DEFAULT_OUTPUT_FILE, self._DEFAULT_RESTART_FILE_NAME]
        calcinfo.retrieve_list += settings.pop('additional_retrieve_list', [])

        # symlinks
        if 'parent_calc_folder' in self.inputs:
            comp_uuid = self.inputs.parent_calc_folder.computer.uuid
            remote_path = self.inputs.parent_calc_folder.get_remote_path()
            symlink = (comp_uuid, remote_path, self._DEFAULT_PARENT_CALC_FLDR_NAME)
            calcinfo.remote_symlink_list.append(symlink)

        # check for left over settings
        if settings:
            raise InputValidationError("The following keys have been found " +
                                       "in the settings input node {}, ".format(self.pk) + "but were not understood: " +
                                       ",".join(settings.keys()))

        return calcinfo