Hello. You can get access to the execution date of today and subtract a day
from it. You can use a PythonOperator with provide_context=True, that will
give your Python method a ds argument that has the execution date in it.
Manipulate it and return an XCOM.
For example, here's a filename being derived from execution date minus one
day:
def get_filename_to_process(ds, **kwargs):
execdate=datetime.strptime(ds,"%Y-%m-%d")
my_file_path =
"dirname/{0}{1:02d}{2:02d}000000.csv".format(execdate.year,execdate.month,execdate.day-1)
logging.info("my_file_path: ".format(my_file_path))
return my_file_path
get_filename = PythonOperator(
task_id='the_filename',
python_callable=get_filename_to_process,
provide_context=True,
dag=dag)
Then, from other operators, you'd pull it in using some templating:
{{ task_instance.xcom_pull(task_ids='the_filename') }}
Hope that helps, sorry if I misunderstood your question.
On Thu, Apr 27, 2017 at 6:28 PM Alek Storm <alek.st...@gmail.com> wrote:
> I'd like to create a job that runs six times a day, all with the same
> execution date (the previous day). Is there a way to do this without
> generating six separate DAGs, or running an `airflow clear` command in
> between runs?
>
> Thanks,
> Alek
>
