8/5/2023 0 Comments Apache airflow etl tutorialLearn new concepts from industry experts Gain a foundational understanding. In contrast, with the Taskflow API in Airflow 2. When you enroll in this course, youll also be asked to select a specific program. """ extract_task > transform_task > load_task doc_md = """ \ # Load task A simple Load task which takes in the result of the Transform task, by reading it from xcom and instead of saving it to end user review, just prints it out. """ load_task = PythonOperator ( task_id = 'load', python_callable = load, ) load_task. This computed value is then put into xcom, so that it can be processed by the next task. doc_md = """ \ # Transform task A simple Transform task which takes in the collection of order data from xcom and computes the total order value. """ transform_task = PythonOperator ( task_id = 'transform', python_callable = transform, ) transform_task. This data is then put into xcom, so that it can be processed by the next task. In this case, getting data is simulated by reading from a hardcoded JSON string. doc_md = """ \ # Extract task A simple Extract task to get data ready for the rest of the data pipeline. In Airflow 1.x, this task is defined as shown below:Įxtract_task = PythonOperator ( task_id = 'extract', python_callable = extract, ) extract_task. Let’s examine this in detail by looking at the Transform task in isolation since it is It is all abstracted from the DAG developer. """ extract_task > transform_task > load_taskĪll of the processing shown above is being done in the new Airflow 2.0 dag as well, but loads ( total_value_string ) print ( total_order_value ) extract_task = PythonOperator ( task_id = 'extract', python_callable = extract, ) extract_task. xcom_pull ( task_ids = 'transform', key = 'total_order_value' ) total_order_value = json. xcom_push ( 'total_order_value', total_value_json_string ) def load ( ** kwargs ): ti = kwargs total_value_string = ti. Import json from corators import dag, task from import days_ago # These args will get passed on to each operator # You can override them on a per-task basis during operator initialization default_args = total_value_json_string = json.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |