Source code for airflow.contrib.operators.s3_list_operator

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from airflow.hooks.S3_hook import S3Hook
from airflow.models import BaseOperator
from airflow.utils.decorators import apply_defaults

[docs]class S3ListOperator(BaseOperator): """ List all objects from the bucket with the given string prefix in name. This operator returns a python list with the name of objects which can be used by `xcom` in the downstream task. :param bucket: The S3 bucket where to find the objects. (templated) :type bucket: string :param prefix: Prefix string to filters the objects whose name begin with such prefix. (templated) :type prefix: string :param delimiter: the delimiter marks key hierarchy. (templated) :type delimiter: string :param aws_conn_id: The connection ID to use when connecting to S3 storage. :type aws_conn_id: string **Example**: The following operator would list all the files (excluding subfolders) from the S3 ``customers/2018/04/`` key in the ``data`` bucket. :: s3_file = S3ListOperator( task_id='list_3s_files', bucket='data', prefix='customers/2018/04/', delimiter='/', aws_conn_id='aws_customers_conn' ) """ template_fields = ('bucket', 'prefix', 'delimiter') ui_color = '#ffd700' @apply_defaults def __init__(self, bucket, prefix='', delimiter='', aws_conn_id='aws_default', *args, **kwargs): super(S3ListOperator, self).__init__(*args, **kwargs) self.bucket = bucket self.prefix = prefix self.delimiter = delimiter self.aws_conn_id = aws_conn_id
[docs] def execute(self, context): hook = S3Hook(aws_conn_id=self.aws_conn_id) 'Getting the list of files from bucket: {0} in prefix: {1} (Delimiter {2})'. format(self.bucket, self.prefix, self.delimiter)) return hook.list_keys( bucket_name=self.bucket, prefix=self.prefix, delimiter=self.delimiter)