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Implementing an SmtpNotifier

Now that you've successfully created a failure callback, your team lead has asked that all successful Dag runs be sent via email to a team alias. After reviewing the Airflow documentation, you decide that using Airflow's built-in notifier framework is your best option.

The dag and task objects are already imported, the alert_on_failure callback function and the get_sales_data and process_sales_data tasks are already defined for you.

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Import the SMTP notifier object.
Add a success callback attribute to the Dag.
Send the notification to [email protected].
Include a subject.

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