How to use the httprunner.utils.prepare_log_file_abs_path function in httprunner

if self.save_tests:
                logs_file_abs_path = utils.prepare_log_file_abs_path(
                    self.test_path, f"testcase_{index+1}.log"
                )
                log_handler = logger.add(logs_file_abs_path, level="DEBUG")

            logger.info(f"Start to run testcase: {testcase.config.name}")

            result = self.unittest_runner.run(testcase)
            testcase_summary = report.get_summary(result)
            testcase_summary.in_out.vars = testcase.config.variables
            testcase_summary.in_out.out = testcase.config.export

            if self.save_tests and log_handler:
                logger.remove(log_handler)
                logs_file_abs_path = utils.prepare_log_file_abs_path(
                    self.test_path, f"testcase_{index+1}.log"
                )
                testcase_summary.log = logs_file_abs_path

            if result.wasSuccessful():
                tests_results.append(testcase_summary)
            else:
                tests_results.insert(0, testcase_summary)

        return tests_results

def _run_suite(self, prepared_testcases: List[unittest.TestSuite]) -> List[TestCaseSummary]:
        """ run prepared testcases
        """
        tests_results: List[TestCaseSummary] = []

        for index, testcase in enumerate(prepared_testcases):
            log_handler = None
            if self.save_tests:
                logs_file_abs_path = utils.prepare_log_file_abs_path(
                    self.test_path, f"testcase_{index+1}.log"
                )
                log_handler = logger.add(logs_file_abs_path, level="DEBUG")

            logger.info(f"Start to run testcase: {testcase.config.name}")

            result = self.unittest_runner.run(testcase)
            testcase_summary = report.get_summary(result)
            testcase_summary.in_out.vars = testcase.config.variables
            testcase_summary.in_out.out = testcase.config.export

            if self.save_tests and log_handler:
                logger.remove(log_handler)
                logs_file_abs_path = utils.prepare_log_file_abs_path(
                    self.test_path, f"testcase_{index+1}.log"
                )

def run_tests(self, tests_mapping) -> TestSuiteSummary:
        """ run testcase/testsuite data
        """
        tests = TestsMapping.parse_obj(tests_mapping)
        self.test_path = tests.project_mapping.test_path

        if self.save_tests:
            utils.dump_json_file(
                tests_mapping,
                utils.prepare_log_file_abs_path(self.test_path, "loaded.json")
            )

        # prepare testcases
        self.exception_stage = "prepare testcases"
        prepared_testcases = self._prepare_tests(tests)

        # run prepared testcases
        self.exception_stage = "run prepared testcases"
        results = self._run_suite(prepared_testcases)

        # aggregate results
        self.exception_stage = "aggregate results"
        self._summary = self._aggregate(results)

        # generate html report
        self.exception_stage = "generate html report"

# aggregate results
        self.exception_stage = "aggregate results"
        self._summary = self._aggregate(results)

        # generate html report
        self.exception_stage = "generate html report"

        if self.save_tests:
            utils.dump_json_file(
                self._summary.dict(),
                utils.prepare_log_file_abs_path(self.test_path, "summary.json"),
            )
            # save variables and export data
            vars_out = self.get_vars_out()
            utils.dump_json_file(
                vars_out, utils.prepare_log_file_abs_path(self.test_path, "io.json")
            )

        return self._summary

if self.save_tests:
                logs_file_abs_path = utils.prepare_log_file_abs_path(
                    self.test_path, f"testcase_{index+1}.log"
                )
                log_handler = logger.add(logs_file_abs_path, level="DEBUG")

            logger.info(f"Start to run testcase: {testcase.config.name}")

            result = self.unittest_runner.run(testcase)
            testcase_summary = report.get_summary(result)
            testcase_summary.in_out.vars = testcase.config.variables
            testcase_summary.in_out.export = testcase.config.export

            if self.save_tests and log_handler:
                logger.remove(log_handler)
                logs_file_abs_path = utils.prepare_log_file_abs_path(
                    self.test_path, f"testcase_{index+1}.log"
                )
                testcase_summary.log = logs_file_abs_path

            if result.wasSuccessful():
                tests_results.append(testcase_summary)
            else:
                tests_results.insert(0, testcase_summary)

        return tests_results

self._summary = self._aggregate(results)

        # generate html report
        self.exception_stage = "generate html report"
        report.stringify_summary(self._summary)

        if self.save_tests:
            utils.dump_json_file(
                self._summary.dict(),
                utils.prepare_log_file_abs_path(self.test_path, "summary.json")
            )
            # save variables and export data
            vars_out = self.get_vars_out()
            utils.dump_json_file(
                vars_out,
                utils.prepare_log_file_abs_path(self.test_path, "io.json")
            )

        return self._summary