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https://issues.apache.org/jira/browse/AIRFLOW-1076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16601547#comment-16601547
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Apache Spark commented on AIRFLOW-1076:
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User 'dhuang' has created a pull request for this issue:
https://github.com/apache/incubator-airflow/pull/2223
> Support getting variable by string in templates
> -----------------------------------------------
>
> Key: AIRFLOW-1076
> URL: https://issues.apache.org/jira/browse/AIRFLOW-1076
> Project: Apache Airflow
> Issue Type: Improvement
> Reporter: Daniel Huang
> Assignee: Daniel Huang
> Priority: Minor
>
> Currently, one can fetch variables in templates with {{ var.value.foo }}. But
> that doesn't work if the variable key has a character you can't use as an
> attribute, like ":" or "-".
> Should provide alternative method of {{ var.value.get('foo:bar') }}. Can then
> also supply a default value if the variable is not found. This also allows
> you to fetch the variable specified in another jinja variable (probably not
> common use case).
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