How to use the azure._str function in azure

def list_service_certificates(self, service_name):
        '''
        Lists all of the service certificates associated with the specified
        hosted service.

        service_name: Name of the hosted service.
        '''
        _validate_not_none('service_name', service_name)
        return self._perform_get(
            '/' + self.subscription_id + '/services/hostedservices/' +
            _str(service_name) + '/certificates',
            Certificates)

content_md5:
            Optional. An MD5 hash of the block content. This hash is used to
            verify the integrity of the blob during transport. When this
            header is specified, the storage service checks the hash that has
            arrived with the one that was sent.
        x_ms_lease_id: Required if the blob has an active lease.
        '''
        _validate_not_none('container_name', container_name)
        _validate_not_none('blob_name', blob_name)
        _validate_not_none('block', block)
        _validate_not_none('blockid', blockid)
        request = HTTPRequest()
        request.method = 'PUT'
        request.host = self._get_host()
        request.path = '/' + \
            _str(container_name) + '/' + _str(blob_name) + '?comp=block'
        request.headers = [
            ('Content-MD5', _str_or_none(content_md5)),
            ('x-ms-lease-id', _str_or_none(x_ms_lease_id))
        ]
        request.query = [('blockid', _encode_base64(_str_or_none(blockid)))]
        request.body = _get_request_body_bytes_only('block', block)
        request.path, request.query = _update_request_uri_query_local_storage(
            request, self.use_local_storage)
        request.headers = _update_storage_blob_header(
            request, self.account_name, self.account_key)
        self._perform_request(request)

def get_blob_properties(self, container_name, blob_name,
                            x_ms_lease_id=None):
        '''
        Returns all user-defined metadata, standard HTTP properties, and
        system properties for the blob.

        container_name: Name of existing container.
        blob_name: Name of existing blob.
        x_ms_lease_id: Required if the blob has an active lease.
        '''
        _validate_not_none('container_name', container_name)
        _validate_not_none('blob_name', blob_name)
        request = HTTPRequest()
        request.method = 'HEAD'
        request.host = self._get_host()
        request.path = '/' + _str(container_name) + '/' + _str(blob_name) + ''
        request.headers = [('x-ms-lease-id', _str_or_none(x_ms_lease_id))]
        request.path, request.query = _update_request_uri_query_local_storage(
            request, self.use_local_storage)
        request.headers = _update_storage_blob_header(
            request, self.account_name, self.account_key)
        response = self._perform_request(request)

        return _parse_response_for_dict(response)

def extended_properties_dict_to_xml_fragment(extended_properties):
        xml = ''
        if extended_properties is not None and len(extended_properties) > 0:
            xml += ''
            for key, val in extended_properties.items():
                xml += ''.join(['',
                                '',
                                _str(key),
                                '',
                               '',
                               _str(val),
                               '',
                               ''])
            xml += ''
        return xml

blob_name: Name of destination blob.
         x_ms_copy_id:
            Copy identifier provided in the x-ms-copy-id of the original
            copy_blob operation.
         x_ms_lease_id:
            Required if the destination blob has an active infinite lease.
        '''
        _validate_not_none('container_name', container_name)
        _validate_not_none('blob_name', blob_name)
        _validate_not_none('x_ms_copy_id', x_ms_copy_id)
        request = HTTPRequest()
        request.method = 'PUT'
        request.host = self._get_host()
        request.path = '/' + _str(container_name) + '/' + \
            _str(blob_name) + '?comp=copy&copyid=' + \
            _str(x_ms_copy_id)
        request.headers = [
            ('x-ms-lease-id', _str_or_none(x_ms_lease_id)),
            ('x-ms-copy-action', 'abort'),
        ]
        request.path, request.query = _update_request_uri_query_local_storage(
            request, self.use_local_storage)
        request.headers = _update_storage_blob_header(
            request, self.account_name, self.account_key)
        self._perform_request(request)

topic_name: Name of the topic.
        subscription_name: Name of the subscription.
        rule_name:
            Name of the rule to delete.  DEFAULT_RULE_NAME=$Default.
            Use DEFAULT_RULE_NAME to delete default rule for the subscription.
        fail_not_exist:
            Specify whether throw exception when rule doesn't exist.
        '''
        _validate_not_none('topic_name', topic_name)
        _validate_not_none('subscription_name', subscription_name)
        _validate_not_none('rule_name', rule_name)
        request = HTTPRequest()
        request.method = 'DELETE'
        request.host = self._get_host()
        request.path = '/' + _str(topic_name) + '/subscriptions/' + \
            _str(subscription_name) + \
            '/rules/' + _str(rule_name) + ''
        request.path, request.query = _update_request_uri_query(request)
        request.headers = self._update_service_bus_header(request)
        if not fail_not_exist:
            try:
                self._perform_request(request)
                return True
            except WindowsAzureError as ex:
                _dont_fail_not_exist(ex)
                return False
        else:
            self._perform_request(request)
            return True

'''
        Sets user-defined metadata for the specified blob as one or more
        name-value pairs.

        container_name: Name of existing container.
        blob_name: Name of existing blob.
        x_ms_meta_name_values: Dict containing name and value pairs.
        x_ms_lease_id: Required if the blob has an active lease.
        '''
        _validate_not_none('container_name', container_name)
        _validate_not_none('blob_name', blob_name)
        request = HTTPRequest()
        request.method = 'PUT'
        request.host = self._get_host()
        request.path = '/' + \
            _str(container_name) + '/' + _str(blob_name) + '?comp=metadata'
        request.headers = [
            ('x-ms-meta-name-values', x_ms_meta_name_values),
            ('x-ms-lease-id', _str_or_none(x_ms_lease_id))
        ]
        request.path, request.query = _update_request_uri_query_local_storage(
            request, self.use_local_storage)
        request.headers = _update_storage_blob_header(
            request, self.account_name, self.account_key)
        self._perform_request(request)

if_match:
            Optional. Specifies the condition for which the delete should be
            performed. To force an unconditional delete, set to the wildcard
            character (*).
        '''
        _validate_not_none('table_name', table_name)
        _validate_not_none('partition_key', partition_key)
        _validate_not_none('row_key', row_key)
        _validate_not_none('content_type', content_type)
        _validate_not_none('if_match', if_match)
        request = HTTPRequest()
        request.method = 'DELETE'
        request.host = self._get_host()
        request.path = '/' + \
            _str(table_name) + '(PartitionKey=\'' + \
            _str(partition_key) + '\',RowKey=\'' + _str(row_key) + '\')'
        request.headers = [
            ('Content-Type', _str_or_none(content_type)),
            ('If-Match', _str_or_none(if_match))
        ]
        request.path, request.query = _update_request_uri_query_local_storage(
            request, self.use_local_storage)
        request.headers = _update_storage_table_header(request)
        self._perform_request(request)

def extended_properties_dict_to_xml_fragment(extended_properties):
        xml = ''
        if extended_properties is not None and len(extended_properties) > 0:
            xml += ''
            for key, val in extended_properties.items():
                xml += ''.join(['',
                                '',
                                _str(key),
                                '',
                               '',
                               _str(val),
                               '',
                               ''])
            xml += ''
        return xml

'''
        Sets user-defined metadata for the specified blob as one or more
        name-value pairs.

        container_name: Name of existing container.
        blob_name: Name of existing blob.
        x_ms_meta_name_values: Dict containing name and value pairs.
        x_ms_lease_id: Required if the blob has an active lease.
        '''
        _validate_not_none('container_name', container_name)
        _validate_not_none('blob_name', blob_name)
        request = HTTPRequest()
        request.method = 'PUT'
        request.host = self._get_host()
        request.path = '/' + \
            _str(container_name) + '/' + _str(blob_name) + '?comp=metadata'
        request.headers = [
            ('x-ms-meta-name-values', x_ms_meta_name_values),
            ('x-ms-lease-id', _str_or_none(x_ms_lease_id))
        ]
        request.path, request.query = _update_request_uri_query_local_storage(
            request, self.use_local_storage)
        request.headers = _update_storage_blob_header(
            request, self.account_name, self.account_key)
        self._perform_request(request)