<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def post_process(self, dir_name, d):
 """ Simple post-processing for various files other than the vasprun.xml. Called by generate_task_doc. Modify this if your runs have other kinds of processing requirements. Args: dir_name: The dir_name. d: Current doc generated. """

        logger.info("Post-processing dir:{}".format(dir_name))

        fullpath = os.path.abspath(dir_name)

        # VASP input generated by pymatgen's alchemy has a
        # transformations.json file that keeps track of the origin of a
        # particular structure. This is extremely useful for tracing back a
        # result. If such a file is found, it is inserted into the task doc
        # as d["transformations"]
        transformations = {}
        filenames = glob.glob(os.path.join(fullpath, "transformations.json*"))
        if len(filenames) >= 1:
            with zopen(filenames[0], "rt") as f:
                transformations = json.load(f)
                try:
                    m = re.match("(\d+)-ICSD",
                                 transformations["history"][0]["source"])
                    if m:
                        d["icsd_id"] = int(m.group(1))
                except Exception as ex:
                    logger.warning("Cannot parse ICSD from transformations "
                                   "file.")
                    pass
        else:
            logger.warning("Transformations file does not exist.")

        other_parameters = transformations.get("other_parameters")
        new_tags = None
        if other_parameters:
            # We don't want to leave tags or authors in the
            # transformations file because they'd be copied into
            # every structure generated after this one.
            new_tags = other_parameters.pop("tags", None)
            new_author = other_parameters.pop("author", None)
            if new_author:
                d["author"] = new_author
            if not other_parameters:  # if dict is now empty remove it
                transformations.pop("other_parameters")

        d["transformations"] = transformations

        # Calculations done using custodian has a custodian.json,
        # which tracks the jobs performed and any errors detected and fixed.
        # This is useful for tracking what has actually be done to get a
        # result. If such a file is found, it is inserted into the task doc
        # as d["custodian"]
        filenames = glob.glob(os.path.join(fullpath, "custodian.json*"))
        if len(filenames) >= 1:
            with zopen(filenames[0], "rt") as f:
                d["custodian"] = json.load(f)

        # Parse OUTCAR for additional information and run stats that are
        # generally not in vasprun.xml.
        try:
            run_stats = {}
            for filename in glob.glob(os.path.join(fullpath, "OUTCAR*")):
                outcar = Outcar(filename)
                i = 1 if re.search("relax2", filename) else 0
                taskname = "relax2" if re.search("relax2", filename) else \
                    "relax1"
                d["calculations"][i]["output"]["outcar"] = outcar.as_dict()
                run_stats[taskname] = outcar.run_stats
        except:
            logger.error("Bad OUTCAR for {}.".format(fullpath))

        try:
            overall_run_stats = {}
            for key in ["Total CPU time used (sec)", "User time (sec)",
                        "System time (sec)", "Elapsed time (sec)"]:
                overall_run_stats[key] = sum([v[key]
                                              for v in run_stats.values()])
            run_stats["overall"] = overall_run_stats
        except:
            logger.error("Bad run stats for {}.".format(fullpath))

        d["run_stats"] = run_stats

        #Convert to full uri path.
        if self.use_full_uri:
            d["dir_name"] = get_uri(dir_name)

        if new_tags:
            d["tags"] = new_tags

        logger.info("Post-processed " + fullpath)