How to use the jc.parsers.free.parse function in jc

def test_free_centos_7_7(self):
        """
        Test 'free' on Centos 7.7
        """
        self.assertEqual(jc.parsers.free.parse(self.centos_7_7_free, quiet=True), self.centos_7_7_free_json)

def test_free_h_centos_7_7(self):
        """
        Test 'free -h' on Centos 7.7
        """
        self.assertEqual(jc.parsers.free.parse(self.centos_7_7_free_h, quiet=True), self.centos_7_7_free_h_json)

def test_free_h_ubuntu_18_4(self):
        """
        Test 'free -h' on Ubuntu 18.4
        """
        self.assertEqual(jc.parsers.free.parse(self.ubuntu_18_4_free_h, quiet=True), self.ubuntu_18_4_free_h_json)

def test_free_ubuntu_18_4(self):
        """
        Test 'free' on Ubuntu 18.4
        """
        self.assertEqual(jc.parsers.free.parse(self.ubuntu_18_4_free, quiet=True), self.ubuntu_18_4_free_json)

# parsers
    if '--arp' in sys.argv:
        result = jc.parsers.arp.parse(data, raw=raw, quiet=quiet)

    elif '--df' in sys.argv:
        result = jc.parsers.df.parse(data, raw=raw, quiet=quiet)

    elif '--dig' in sys.argv:
        result = jc.parsers.dig.parse(data, raw=raw, quiet=quiet)

    elif '--env' in sys.argv:
        result = jc.parsers.env.parse(data, raw=raw, quiet=quiet)

    elif '--free' in sys.argv:
        result = jc.parsers.free.parse(data, raw=raw, quiet=quiet)

    elif '--history' in sys.argv:
        result = jc.parsers.history.parse(data, raw=raw, quiet=quiet)

    elif '--ifconfig' in sys.argv:
        result = jc.parsers.ifconfig.parse(data, raw=raw, quiet=quiet)

    elif '--iptables' in sys.argv:
        result = jc.parsers.iptables.parse(data, raw=raw, quiet=quiet)

    elif '--jobs' in sys.argv:
        result = jc.parsers.jobs.parse(data, raw=raw, quiet=quiet)

    elif '--ls' in sys.argv:
        result = jc.parsers.ls.parse(data, raw=raw, quiet=quiet)

if '-p' in sys.argv:
        pretty = True

    if '-q' in sys.argv:
        quiet = True

    if '-r' in sys.argv:
        raw = True

    # parsers
    parser_map = {
        '--arp': jc.parsers.arp.parse,
        '--df': jc.parsers.df.parse,
        '--dig': jc.parsers.dig.parse,
        '--env': jc.parsers.env.parse,
        '--free': jc.parsers.free.parse,
        '--fstab': jc.parsers.fstab.parse,
        '--history': jc.parsers.history.parse,
        '--hosts': jc.parsers.hosts.parse,
        '--ifconfig': jc.parsers.ifconfig.parse,
        '--iptables': jc.parsers.iptables.parse,
        '--jobs': jc.parsers.jobs.parse,
        '--ls': jc.parsers.ls.parse,
        '--lsblk': jc.parsers.lsblk.parse,
        '--lsmod': jc.parsers.lsmod.parse,
        '--lsof': jc.parsers.lsof.parse,
        '--mount': jc.parsers.mount.parse,
        '--netstat': jc.parsers.netstat.parse,
        '--ps': jc.parsers.ps.parse,
        '--route': jc.parsers.route.parse,
        '--ss': jc.parsers.ss.parse,
        '--stat': jc.parsers.stat.parse,