How to use the pyperf._cpu_utils.parse_cpu_list function in pyperf

def _cpu_affinity(self):
        cpus = self.args.affinity
        if not cpus:
            # --affinity option is not set: detect isolated CPUs
            isolated = True
            cpus = get_isolated_cpus()
            if not cpus:
                # no isolated CPUs or unable to get the isolated CPUs
                return
        else:
            isolated = False
            cpus = parse_cpu_list(cpus)

        if set_cpu_affinity(cpus):
            if self.args.verbose:
                if isolated:
                    text = ("Pin process to isolated CPUs: %s"
                            % format_cpu_list(cpus))
                else:
                    text = ("Pin process to CPUs: %s"
                            % format_cpu_list(cpus))
                print(text)

            if isolated:
                self.args.affinity = format_cpu_list(cpus)
        else:
            if not isolated:
                print("ERROR: CPU affinity not available.", file=sys.stderr)

def parse_affinity(value):
        try:
            cpus = parse_cpu_list(value)
        except ValueError:
            cpus = None
        if not cpus:
            raise argparse.ArgumentTypeError('invalid CPU list: %r' % value)
        return cpus

def collect_cpu_config(metadata, cpus):
    nohz_full = read_first_line(sysfs_path('devices/system/cpu/nohz_full'))
    if nohz_full:
        nohz_full = parse_cpu_list(nohz_full)

    isolated = get_isolated_cpus()
    if isolated:
        isolated = set(isolated)

    configs = {}
    for cpu in cpus:
        config = get_cpu_config(cpu)
        if nohz_full and cpu in nohz_full:
            config.append('nohz_full')
        if isolated and cpu in isolated:
            config.append('isolated')
        if config:
            configs[cpu] = ', '.join(config)
    config = format_cpu_infos(configs)

def show(self):
        nohz_full = self.read_first_line(sysfs_path('devices/system/cpu/nohz_full'))
        if not nohz_full:
            return

        nohz_full = parse_cpu_list(nohz_full)
        if not nohz_full:
            return

        used = set(self.system.cpus) | set(nohz_full)
        if not used:
            return

        self.advice("WARNING: nohz_full is enabled on CPUs %s which use the "
                    "intel_pstate driver, whereas intel_pstate is incompatible "
                    "with nohz_full"
                    % format_cpu_list(used))
        self.advice("See https://bugzilla.redhat.com/show_bug.cgi?id=1378529")
        self.tuned_for_benchmarks = False