airflow.contrib.operators.gcs_download_operator

Module Contents

class airflow.contrib.operators.gcs_download_operator.GoogleCloudStorageDownloadOperator(bucket, object, filename=None, store_to_xcom_key=None, google_cloud_storage_conn_id='google_cloud_default', delegate_to=None, *args, **kwargs)[source]

Bases: airflow.models.BaseOperator

Downloads a file from Google Cloud Storage.

If a filename is supplied, it writes the file to the specified location, alternatively one can set the store_to_xcom_key parameter to True push the file content into xcom. When the file size exceeds the maximum size for xcom it is recommended to write to a file.

Parameters

  • bucket (str) – The Google cloud storage bucket where the object is. Must not contain ‘gs://’ prefix. (templated)

  • object (str) – The name of the object to download in the Google cloud storage bucket. (templated)

  • filename (str) – The file path, including filename, on the local file system (where the operator is being executed) that the file should be downloaded to. (templated) If no filename passed, the downloaded data will not be stored on the local file system.

  • store_to_xcom_key (str) – If this param is set, the operator will push the contents of the downloaded file to XCom with the key set in this parameter. If not set, the downloaded data will not be pushed to XCom. (templated)

  • google_cloud_storage_conn_id (str) – The connection ID to use when connecting to Google cloud storage.

  • delegate_to (str) – The account to impersonate, if any. For this to work, the service account making the request must have domain-wide delegation enabled.

template_fields = ['bucket', 'object', 'filename', 'store_to_xcom_key'][source]
ui_color = #f0eee4[source]
execute(self, context)[source]

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