How to use the bioblend.log function in bioblend

buckets = s3_conn.get_all_buckets()
        except S3ResponseError as e:
            response['error'] = "S3ResponseError getting buckets: %s" % e
        except self.http_exceptions as ex:
            response['error'] = "Exception getting buckets: %s" % ex
        if response['error']:
            bioblend.log.exception(response['error'])
            return response
        for bucket in [b for b in buckets if b.name.startswith('cm-')]:
            try:
                # TODO: first lookup if persistent_data.yaml key exists
                pd = bucket.get_key('persistent_data.yaml')
            except S3ResponseError:
                # This can fail for a number of reasons for non-us and/or
                # CNAME'd buckets but it is not a terminal error
                bioblend.log.warning("Problem fetching persistent_data.yaml from bucket %s", bucket)
                continue
            if pd:
                # We are dealing with a CloudMan bucket
                pd_contents = pd.get_contents_as_string()
                pd = yaml.load(pd_contents)
                if 'cluster_name' in pd:
                    cluster_name = pd['cluster_name']
                else:
                    for key in bucket.list():
                        if key.name.endswith('.clusterName'):
                            cluster_name = key.name.split('.clusterName')[0]
                cluster = {'cluster_name': cluster_name,
                           'persistent_data': pd,
                           'bucket_name': bucket.name}
                # Look for cluster's placement too
                if include_placement:

if cmsg:
            progress['name'] = cmsg.name
            progress['sg_id'] = cmsg.id
            # Add appropriate authorization rules
            # If these rules already exist, nothing will be changed in the SG
            for port in ports:
                try:
                    if not self.rule_exists(
                            cmsg.rules, from_port=port[0], to_port=port[1]):
                        cmsg.authorize(
                            ip_protocol='tcp',
                            from_port=port[0],
                            to_port=port[1],
                            cidr_ip='0.0.0.0/0')
                    else:
                        bioblend.log.debug("Rule (%s:%s) already exists in the SG", port[0], port[1])
                except EC2ResponseError as e:
                    err_msg = "A problem adding security group authorizations: {0} " \
                              "(code {1}; status {2})" \
                              .format(str(e), e.error_code, e.status)
                    bioblend.log.exception(err_msg)
                    progress['error'] = err_msg
            # Add ICMP (i.e., ping) rule required by HTCondor
            try:
                if not self.rule_exists(
                        cmsg.rules, from_port='-1', to_port='-1', ip_protocol='icmp'):
                    cmsg.authorize(
                        ip_protocol='icmp',
                        from_port=-1,
                        to_port=-1,
                        cidr_ip='0.0.0.0/0')
                else:

"""
        assert vm_ready_timeout > 0
        assert vm_ready_timeout > vm_ready_check_interval
        assert vm_ready_check_interval > 0

        if self.host_name:  # Host name available. Therefore, instance is ready
            return

        for time_left in range(vm_ready_timeout, 0, -vm_ready_check_interval):
            status = self.get_machine_status()
            if status['public_ip'] != '' and status['error'] == '':
                self._init_instance(status['public_ip'])
                return
            elif status['error'] != '':
                msg = "Error launching an instance: {0}".format(status['error'])
                bioblend.log.error(msg)
                raise VMLaunchException(msg)
            else:
                bioblend.log.warning("Instance not ready yet (it's in state '{0}'); waiting another {1} seconds..."
                                     .format(status['instance_state'], time_left))
                time.sleep(vm_ready_check_interval)

        raise VMLaunchException("Waited too long for instance to become ready. Instance Id: %s"
                                % self.instance_id)

else:
                if r.status_code == 200:
                    if not json:
                        return r
                    elif not r.content:
                        msg = "GET: empty response"
                    else:
                        try:
                            return r.json()
                        except ValueError:
                            msg = "GET: invalid JSON : %r" % (r.content,)
                else:
                    msg = "GET: error %s: %r" % (r.status_code, r.content)
            msg = "%s, %d attempts left" % (msg, attempts_left)
            if attempts_left <= 0:
                bioblend.log.error(msg)
                raise ConnectionError(msg, body=r.text,
                                      status_code=r.status_code)
            else:
                bioblend.log.warning(msg)
                time.sleep(retry_delay)

def _get_volume_placement(self, vol_id):
        """
        Returns the placement of a volume (or None, if it cannot be determined)
        """
        try:
            vol = self.ec2_conn.get_all_volumes(volume_ids=[vol_id])
        except EC2ResponseError as ec2e:
            bioblend.log.error("EC2ResponseError querying for volume {0}: {1}"
                               .format(vol_id, ec2e))
            vol = None
        if vol:
            return vol[0].zone
        else:
            bioblend.log.error("Requested placement of a volume '%s' that does not exist.", vol_id)
            return None

if g_rule_exists:
                    break
            if not g_rule_exists:
                try:
                    cmsg.authorize(
                        src_group=cmsg,
                        ip_protocol='tcp',
                        from_port=0,
                        to_port=65535)
                except EC2ResponseError as e:
                    err_msg = "A problem with security group group " \
                              "authorization: {0} (code {1}; status {2})" \
                              .format(str(e), e.error_code, e.status)
                    bioblend.log.exception(err_msg)
                    progress['err_msg'] = err_msg
            bioblend.log.info("Done configuring '%s' security group", cmsg.name)
        else:
            bioblend.log.warning(
                "Did not create security group '{0}'".format(sg_name))
        return progress

.. versionadded:: 0.3
        .. versionchanged:: 0.7.0
            The return value changed from a list to a dictionary.
        """
        clusters = []
        response = {'clusters': clusters, 'error': None}
        s3_conn = self.connect_s3(self.access_key, self.secret_key, self.cloud)
        try:
            buckets = s3_conn.get_all_buckets()
        except S3ResponseError as e:
            response['error'] = "S3ResponseError getting buckets: %s" % e
        except self.http_exceptions as ex:
            response['error'] = "Exception getting buckets: %s" % ex
        if response['error']:
            bioblend.log.exception(response['error'])
            return response
        for bucket in [b for b in buckets if b.name.startswith('cm-')]:
            try:
                # TODO: first lookup if persistent_data.yaml key exists
                pd = bucket.get_key('persistent_data.yaml')
            except S3ResponseError:
                # This can fail for a number of reasons for non-us and/or
                # CNAME'd buckets but it is not a terminal error
                bioblend.log.warning("Problem fetching persistent_data.yaml from bucket %s", bucket)
                continue
            if pd:
                # We are dealing with a CloudMan bucket
                pd_contents = pd.get_contents_as_string()
                pd = yaml.load(pd_contents)
                if 'cluster_name' in pd:
                    cluster_name = pd['cluster_name']

'sg_ids': [],
               'kp_name': '',
               'kp_material': '',
               'rs': None,
               'instance_id': '',
               'error': None}
        # First satisfy the prerequisites
        for sg in security_groups:
            # Get VPC ID in case we're launching into a VPC
            vpc_id = None
            if subnet_id:
                try:
                    sn = self.vpc_conn.get_all_subnets(subnet_id)[0]
                    vpc_id = sn.vpc_id
                except (EC2ResponseError, IndexError):
                    bioblend.log.exception("Trouble fetching subnet %s", subnet_id)
            cmsg = self.create_cm_security_group(sg, vpc_id=vpc_id)
            ret['error'] = cmsg['error']
            if ret['error']:
                return ret
            if cmsg['name']:
                ret['sg_names'].append(cmsg['name'])
                ret['sg_ids'].append(cmsg['sg_id'])
                if subnet_id:
                    # Must setup a network interface if launching into VPC
                    security_groups = None
                    interface = boto.ec2.networkinterface.NetworkInterfaceSpecification(
                        subnet_id=subnet_id, groups=[cmsg['sg_id']],
                        associate_public_ip_address=True)
                    network_interfaces = (boto.ec2.networkinterface.
                                          NetworkInterfaceCollection(interface))
                else:

def __init__(self, url, api_key=None, email=None, password=None, verify=True):
        self.gi = bioblend.galaxy.GalaxyInstance(url, api_key, email, password, verify)
        self.log = bioblend.log
        self.histories = client.ObjHistoryClient(self)
        self.libraries = client.ObjLibraryClient(self)
        self.workflows = client.ObjWorkflowClient(self)
        self.tools = client.ObjToolClient(self)
        self.jobs = client.ObjJobClient(self)

``contents``.  Alternatively, an explicit ``url`` can be provided.
        If ``json`` is set to ``True``, return a decoded JSON object
        (and treat an empty or undecodable response as an error).

        The request will optionally be retried as configured by
        ``max_get_retries`` and ``get_retry_delay``: this offers some
        resilience in the presence of temporary failures.

        :return: The decoded response if ``json`` is set to ``True``, otherwise
          the response object
        """
        if not url:
            url = self._make_url(module_id=id, deleted=deleted, contents=contents)
        attempts_left = self.max_get_retries()
        retry_delay = self.get_retry_delay()
        bioblend.log.debug("GET - attempts left: %s; retry delay: %s",
                           attempts_left, retry_delay)
        msg = ''
        while attempts_left > 0:
            attempts_left -= 1
            try:
                r = self.gi.make_get_request(url, params=params)
            except (requests.exceptions.ConnectionError, ProtocolError) as e:
                msg = str(e)
                r = requests.Response()  # empty Response object used when raising ConnectionError
            else:
                if r.status_code == 200:
                    if not json:
                        return r
                    elif not r.content:
                        msg = "GET: empty response"
                    else: