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Posted to commits@airflow.apache.org by "Nerdlet369 (via GitHub)" <gi...@apache.org> on 2026/10/11 15:02:18 UTC

[PR] Docs: clarify XComArg indexing semantics in TaskFlow API [airflow]

Nerdlet369 opened a new pull request, #74558:
URL: https://github.com/apache/airflow/pull/74558

   ## Description
   Indexing an `XComArg` with square brackets (for example `email_info['subject']`) does not perform dictionary access on the task return value. It returns a new `XComArg` referencing the XCom pushed by the upstream task under that key, which happens automatically when the upstream task uses `multiple_outputs=True`. Documented this in the TaskFlow tutorial to address the confusion reported in the issue.
   
   ## Related Issue
   Closes #25061


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