'Removes compute nodes from the specified pool.
This operation can only run when the allocation state of the pool is
steady. When this operation runs, the allocation state changes from
steady to resizing.
:param pool_id: The ID of the pool from which you want to remove
nodes.
:type pool_id: str
:param node_remove_parameter: The parameters for the request.
:type node_remove_parameter: :class:`NodeRemoveParameter
<azure.batch.models.NodeRemoveParameter>`
:param pool_remove_nodes_options: Additional parameters for the
operation
:type pool_remove_nodes_options: :class:`PoolRemoveNodesOptions
<azure.batch.models.PoolRemoveNodesOptions>`
:param dict custom_headers: headers that will be added to the request
:param bool raw: returns the direct response alongside the
deserialized response
:param operation_config: :ref:`Operation configuration
overrides<msrest:optionsforoperations>`.
:rtype: None
:rtype: :class:`ClientRawResponse<msrest.pipeline.ClientRawResponse>`
if raw=true
:raises:
:class:`BatchErrorException<azure.batch.models.BatchErrorException>`'

def remove_nodes(self, pool_id, node_remove_parameter, pool_remove_nodes_options=None, custom_headers=None, raw=False, **operation_config):

    timeout = None
    if (pool_remove_nodes_options is not None):
        timeout = pool_remove_nodes_options.timeout
    client_request_id = None
    if (pool_remove_nodes_options is not None):
        client_request_id = pool_remove_nodes_options.client_request_id
    return_client_request_id = None
    if (pool_remove_nodes_options is not None):
        return_client_request_id = pool_remove_nodes_options.return_client_request_id
    ocp_date = None
    if (pool_remove_nodes_options is not None):
        ocp_date = pool_remove_nodes_options.ocp_date
    if_match = None
    if (pool_remove_nodes_options is not None):
        if_match = pool_remove_nodes_options.if_match
    if_none_match = None
    if (pool_remove_nodes_options is not None):
        if_none_match = pool_remove_nodes_options.if_none_match
    if_modified_since = None
    if (pool_remove_nodes_options is not None):
        if_modified_since = pool_remove_nodes_options.if_modified_since
    if_unmodified_since = None
    if (pool_remove_nodes_options is not None):
        if_unmodified_since = pool_remove_nodes_options.if_unmodified_since
    url = '/pools/{poolId}/removenodes'
    path_format_arguments = {'poolId': self._serialize.url('pool_id', pool_id, 'str')}
    url = self._client.format_url(url, **path_format_arguments)
    query_parameters = {}
    query_parameters['api-version'] = self._serialize.query('self.api_version', self.api_version, 'str')
    if (timeout is not None):
        query_parameters['timeout'] = self._serialize.query('timeout', timeout, 'int')
    header_parameters = {}
    header_parameters['Content-Type'] = 'application/json;    odata=minimalmetadata;    charset=utf-8'
    if self.config.generate_client_request_id:
        header_parameters['client-request-id'] = str(uuid.uuid1())
    if custom_headers:
        header_parameters.update(custom_headers)
    if (self.config.accept_language is not None):
        header_parameters['accept-language'] = self._serialize.header('self.config.accept_language', self.config.accept_language, 'str')
    if (client_request_id is not None):
        header_parameters['client-request-id'] = self._serialize.header('client_request_id', client_request_id, 'str')
    if (return_client_request_id is not None):
        header_parameters['return-client-request-id'] = self._serialize.header('return_client_request_id', return_client_request_id, 'bool')
    if (ocp_date is not None):
        header_parameters['ocp-date'] = self._serialize.header('ocp_date', ocp_date, 'rfc-1123')
    if (if_match is not None):
        header_parameters['If-Match'] = self._serialize.header('if_match', if_match, 'str')
    if (if_none_match is not None):
        header_parameters['If-None-Match'] = self._serialize.header('if_none_match', if_none_match, 'str')
    if (if_modified_since is not None):
        header_parameters['If-Modified-Since'] = self._serialize.header('if_modified_since', if_modified_since, 'rfc-1123')
    if (if_unmodified_since is not None):
        header_parameters['If-Unmodified-Since'] = self._serialize.header('if_unmodified_since', if_unmodified_since, 'rfc-1123')
    body_content = self._serialize.body(node_remove_parameter, 'NodeRemoveParameter')
    request = self._client.post(url, query_parameters)
    response = self._client.send(request, header_parameters, body_content, **operation_config)
    if (response.status_code not in [202]):
        raise models.BatchErrorException(self._deserialize, response)
    if raw:
        client_raw_response = ClientRawResponse(None, response)
        client_raw_response.add_headers({'client-request-id': 'str', 'request-id': 'str', 'ETag': 'str', 'Last-Modified': 'rfc-1123', 'DataServiceId': 'str'})
        return client_raw_response
