[GitHub] [airflow] ashb commented on issue #13101: Incorrectly rendered graph

[GitBox <gi...@apache.org>]

ashb commented on issue #13101:
URL: https://github.com/apache/airflow/issues/13101#issuecomment-746059692


   The issue is `op3 >> op4`. This expression returns the right hand side, so to expand out `op1 >> [op2, op3 >> op4] >> op5`, it is equivalent to:
   
   ```python
   op1 >> op2
   op3 >> op4
   op1 >> op4
   op2 >> op5
   op4 >> op5
   ```
   
   To get the structure you want you need to split it up a bit.
   
   
   ```python
   op1 >> [op2, op3]
   op3 >> op4
   op5 << [op2, op4]
   ```
   
   (I can't remember if you can do `[op2, op4] >> op5` or not.)


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