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https://issues.apache.org/jira/browse/AIRFLOW-3362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16691041#comment-16691041
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Ash Berlin-Taylor commented on AIRFLOW-3362:
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Oh interesting! I think that is a fairly new feature in Jinja
> Template to support jinja2 native python types
> ----------------------------------------------
>
> Key: AIRFLOW-3362
> URL: https://issues.apache.org/jira/browse/AIRFLOW-3362
> Project: Apache Airflow
> Issue Type: Improvement
> Components: core, DAG
> Reporter: Duan Shiqiang
> Priority: Major
>
> Airflow latest (1.10.x)'s template can only render into string which is fine
> most of the times, but it would be better to support render into python types.
> It can be very useful if the template system can support render into native
> python types like list, dictionary, etc. Especially when using xcom to pass
> some values between operators.
> Jinja2 supports this feature from 2.10, more info can found here:
> http://jinja.pocoo.org/docs/2.10/nativetypes/
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