def unban_line()

in blocky-client.py [0:0]

• 21 lines of code
• 6 McCabe index (conditional complexity)

def unban_line(ip, linenumber, chain='INPUT'):
    """ Unbans an IP or block by line number """
    if not linenumber:
        return
    exe = IPTABLES_EXEC
    if ':' in ip:
        exe = IP6TABLES_EXEC
    if DEBUG:
        print("Would have removed line %s from %s chain in iptables here..." % (linenumber, chain))
        return True
    try:
        subprocess.check_call([
            ENV_EXEC,
            exe,
            '-D', chain, linenumber
        ], stderr=open(os.devnull, 'wb'))
    except subprocess.CalledProcessError as err:  # iptables error, expected result variant
        return False
    except OSError as err:
        print("%s not found or inaccessible: %s" % (exe, err))
        return False
    return True