def iptables()

in blocky-client.py [0:0]

• 22 lines of code
• 4 McCabe index (conditional complexity)

def iptables(ip, action):
    """ Runs an iptables action on an IP (-A, -C or -D), returns true if
        succeeded, false otherwise """
    try:
        exe = IPTABLES_EXEC
        if ':' in ip:
            exe = IP6TABLES_EXEC
        subprocess.check_call([
            ENV_EXEC,
            exe,
            action, "INPUT",
            "-s", ip,
            "-j", "DROP",
            "-m", "comment",
            "--comment",
            "Banned by Blocky/3.0"
        ], stderr=open(os.devnull, 'wb'))
    except subprocess.CalledProcessError as err:  # iptables error, expected result variant
        print(err.output)
        return False
    except OSError as err:
        print("%s not found or inaccessible: %s" % (exe, err))
        return False
    return True