[GitHub] [airflow] ashb commented on pull request #19734: Custom deprecation proxy implementing __format__

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ashb commented on pull request #19734:
URL: https://github.com/apache/airflow/pull/19734#issuecomment-975496015


   Instead of a custom proxy object for some values could we not make a custom context dict class that returns lazily evaluates and returns actual objects instead?
   
   Cos there was also another problem where `previois_executiob_date is None` was _never_ true (because the lazy object proxy can't catch this case) - if there is this there could be more bugs.
   
   


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