def describe_stream(StreamArn=None, Limit=None, ExclusiveStartShardId=None):
    """
    Returns information about a stream, including the current status of the stream, its Amazon Resource Name (ARN), the composition of its shards, and its corresponding DynamoDB table.
    Each shard in the stream has a SequenceNumberRange associated with it. If the SequenceNumberRange has a StartingSequenceNumber but no EndingSequenceNumber , then the shard is still open (able to receive more stream records). If both StartingSequenceNumber and EndingSequenceNumber are present, then that shard is closed and can no longer receive more data.
    See also: AWS API Documentation
    
    Examples
    The following example describes a stream with a given stream ARN.
    Expected Output:
    
    :example: response = client.describe_stream(
        StreamArn='string',
        Limit=123,
        ExclusiveStartShardId='string'
    )
    
    
    :type StreamArn: string
    :param StreamArn: [REQUIRED]
            The Amazon Resource Name (ARN) for the stream.
            

    :type Limit: integer
    :param Limit: The maximum number of shard objects to return. The upper limit is 100.

    :type ExclusiveStartShardId: string
    :param ExclusiveStartShardId: The shard ID of the first item that this operation will evaluate. Use the value that was returned for LastEvaluatedShardId in the previous operation.

    :rtype: dict
    :return: {
        'StreamDescription': {
            'StreamArn': 'string',
            'StreamLabel': 'string',
            'StreamStatus': 'ENABLING'|'ENABLED'|'DISABLING'|'DISABLED',
            'StreamViewType': 'NEW_IMAGE'|'OLD_IMAGE'|'NEW_AND_OLD_IMAGES'|'KEYS_ONLY',
            'CreationRequestDateTime': datetime(2015, 1, 1),
            'TableName': 'string',
            'KeySchema': [
                {
                    'AttributeName': 'string',
                    'KeyType': 'HASH'|'RANGE'
                },
            ],
            'Shards': [
                {
                    'ShardId': 'string',
                    'SequenceNumberRange': {
                        'StartingSequenceNumber': 'string',
                        'EndingSequenceNumber': 'string'
                    },
                    'ParentShardId': 'string'
                },
            ],
            'LastEvaluatedShardId': 'string'
        }
    }
    
    
    :returns: 
    the AWS customer ID.
    the table name
    the StreamLabel
    
    """
    pass
