potiuk commented on PR #29156:
URL: https://github.com/apache/airflow/pull/29156#issuecomment-1436014426

   I agree with @Taragolis - that passing file-like objects in 
FileTransferOperator is not going to work. Each operator when executing will 
run in its own process/interpreter and there is simply no way to pass the 
file-like object to it.
   
   Closing, unless there will be some explanation - maybe we are wrong and 
there is something we both completely miss. @Draqun  - if you can explain it, 
please do.
   
   The way how you should do what you want is different - you could implement 
File-lilke objects in Hooks and then use TaskFlow approach as desrribed in my 
blog post here: 
https://medium.com/apache-airflow/generic-airflow-transfers-made-easy-5fe8e5e7d2c2


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