def create_zone()

in libcloud/dns/drivers/durabledns.py [0:0]
60 lines of code
10 McCabe index (conditional complexity)

    def create_zone(self, domain, type="master", ttl=None, extra=None):
        """
        Create a new zone.

        :param domain: Name of zone, followed by a dot (.) (e.g. example.com.)
        :type  domain: ``str``

        :param type: Zone type (Only master available). (optional)
        :type  type: ``str``

        :param ttl: TTL for new records. (optional)
        :type  ttl: ``int``

        :param extra: Extra attributes ('mbox', 'ns', 'minimum', 'refresh',
                                        'expire', 'update_acl', 'xfer').
                      (optional)
        :type extra: ``dict``

        :rtype: :class:`Zone`
        """
        if extra is None:
            extra = ZONE_EXTRA_PARAMS_DEFAULT_VALUES
        else:
            extra_fields = ZONE_EXTRA_PARAMS_DEFAULT_VALUES.keys()
            missing = set(extra_fields).difference(set(extra.keys()))
            for field in missing:
                extra[field] = ZONE_EXTRA_PARAMS_DEFAULT_VALUES.get(field)
        schema_params = SCHEMA_BUILDER_MAP.get("create_zone")
        attributes = schema_params.get("attributes")
        schema = api_schema_builder(
            schema_params.get("urn_nid"), schema_params.get("method"), attributes
        )
        params = {
            "apiuser": self.key,
            "apikey": self.secret,
            "zonename": domain,
            "ttl": ttl or DEFAULT_TTL,
        }
        params.update(extra)
        urn = list(schema)[0]
        for child in urn:
            key = child.tag.split(":")[2]
            if key in attributes:
                if isinstance(params.get(key), int):
                    child.text = "%d"
                else:
                    child.text = "%s"
        # We can't insert values directly in child.text because API raises
        # and exception for values that need to be integers. And tostring
        # method from ElementTree can't handle int values.
        skel = ensure_string(tostring(schema))  # Deal with PY3
        req_data = skel % (
            self.key,
            self.secret,
            domain,
            extra.get("ns"),
            extra.get("mbox"),
            extra.get("refresh"),
            extra.get("retry"),
            extra.get("expire"),
            extra.get("minimum"),
            ttl or DEFAULT_TTL,
            extra.get("xfer"),
            extra.get("update_acl"),
        )
        action = "/services/dns/createZone.php?"
        params = {}
        headers = {"SOAPAction": "urn:createZonewsdl#createZone"}
        try:
            self.connection.request(
                action=action,
                params=params,
                data=req_data,
                method="POST",
                headers=headers,
            )
        except DurableDNSException as e:
            if "Zone Already Exist" in e.message:
                raise ZoneAlreadyExistsError(zone_id=domain, driver=self, value=e.message)
            raise e

        zone = self.get_zone(domain)
        return zone