ron819 commented on a change in pull request #4191: [AIRFLOW-3350] Explain how
to use Bitshift Composition with lists
URL: https://github.com/apache/incubator-airflow/pull/4191#discussion_r233748803
##########
File path: docs/concepts.rst
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@@ -240,6 +240,19 @@ We can put this all together to build a simple pipeline:
python_callable=lambda: print("GOODBYE!"))
)
+Bitshift can also be used with lists. For example:
+
+.. code:: python
+
+ op1 >> [op2, op3]
+
+is equivalent to:
+
+.. code:: python
+
+ op1.set_downstream(op2)
Review comment:
@xnuinside There is no difference.
All these 3 are equivalent:
1.
`op1.set_downstream([op2,op3])`
2.
```
op1.set_downstream(op2)
op1.set_downstream(op3)
```
3.
`op1 >> [op2, op3]`
The idea was to explain that lists are supported with bit-shift (3). I
wasn't trying to show all possible ways to set dependencies. Explaining about
(1) vs (2) might be better in setting up dependencies section
https://airflow.apache.org/tutorial.html#setting-up-dependencies
However if you feel strongly about it I will edit to include it here as well.
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