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Posted to commits@airflow.apache.org by GitBox <gi...@apache.org> on 2019/06/21 14:44:49 UTC

[GitHub] [airflow] ashb commented on a change in pull request #4779: [AIRFLOW-3958] List tasks upstream work in chain

ashb commented on a change in pull request #4779: [AIRFLOW-3958] List tasks upstream work in chain
URL: https://github.com/apache/airflow/pull/4779#discussion_r296266991
 
 

 ##########
 File path: airflow/utils/helpers.py
 ##########
 @@ -150,19 +151,50 @@ def as_flattened_list(iterable):
 
 
 def chain(*tasks):
-    """
+    r"""
 
 Review comment:
   > Both string and bytes literals may optionally be prefixed with a letter 'r' or 'R'; such strings are called raw strings and treat backslashes as literal characters
   
   This makes the `\` in the ascii diagram be a backslash. I imagine otherwise it would complain about `\ ` being an invalid escape.

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