def list_container_instances(cluster=None, filter=None, nextToken=None,
    maxResults=None, status=None):
    """
    Returns a list of container instances in a specified cluster. You can filter the results of a ListContainerInstances operation with cluster query language statements inside the filter parameter. For more information, see Cluster Query Language in the Amazon EC2 Container Service Developer Guide .
    See also: AWS API Documentation
    
    Examples
    This example lists all of your available container instances in the specified cluster in your default region.
    Expected Output:
    
    :example: response = client.list_container_instances(
        cluster='string',
        filter='string',
        nextToken='string',
        maxResults=123,
        status='ACTIVE'|'DRAINING'
    )
    
    
    :type cluster: string
    :param cluster: The short name or full Amazon Resource Name (ARN) of the cluster that hosts the container instances to list. If you do not specify a cluster, the default cluster is assumed.

    :type filter: string
    :param filter: You can filter the results of a ListContainerInstances operation with cluster query language statements. For more information, see Cluster Query Language in the Amazon EC2 Container Service Developer Guide .

    :type nextToken: string
    :param nextToken: The nextToken value returned from a previous paginated ListContainerInstances request where maxResults was used and the results exceeded the value of that parameter. Pagination continues from the end of the previous results that returned the nextToken value. This value is null when there are no more results to return.
            Note
            This token should be treated as an opaque identifier that is only used to retrieve the next items in a list and not for other programmatic purposes.
            

    :type maxResults: integer
    :param maxResults: The maximum number of container instance results returned by ListContainerInstances in paginated output. When this parameter is used, ListContainerInstances only returns maxResults results in a single page along with a nextToken response element. The remaining results of the initial request can be seen by sending another ListContainerInstances request with the returned nextToken value. This value can be between 1 and 100. If this parameter is not used, then ListContainerInstances returns up to 100 results and a nextToken value if applicable.

    :type status: string
    :param status: Filters the container instances by status. For example, if you specify the DRAINING status, the results include only container instances that have been set to DRAINING using UpdateContainerInstancesState . If you do not specify this parameter, the default is to include container instances set to ACTIVE and DRAINING .

    :rtype: dict
    :return: {
        'containerInstanceArns': [
            'string',
        ],
        'nextToken': 'string'
    }
    
    
    :returns: 
    (string) --
    
    """
    pass
