'How to Build a Directed Acyclic Graph (DAG) - Towards Open Options Chains Part IV' optionstrading dataengineering
From 8am to 9pm, …we set the correct timezone earlier on
In our task definitions, we need to add code to use XComs to transfer data from the extract to the transform step, and from the transform to the load step. Once again, the benefit of dynamically creating tables is that when we input a new ticker that we have not collected data on before, the pipeline will simply create a new table for that ticker before running the ETL steps. You could, of course, drop this step from the pipeline later on if you want strict control over the tickers being monitored.or. Airflow passes this task instance object into the callables, thereby giving us access to XComs through it.
After processing the data, we do the same thing as we did in Task 2: we push the data as an XCom. Note that XCom valuesTask 3: Load
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