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Posted to commits@airflow.apache.org by GitBox <gi...@apache.org> on 2020/12/19 00:41:11 UTC

[GitHub] [airflow] kaxil opened a new pull request #13171: Replace assignment with augmented assignment

kaxil opened a new pull request #13171:
URL: https://github.com/apache/airflow/pull/13171


   `HTTPSConnection.default_socket_options += socket_options` instead of `HTTPSConnection.default_socket_options = HTTPSConnection.default_socket_options + socket_options`
   
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[GitHub] [airflow] XD-DENG commented on pull request #13171: Replace assignment with augmented assignment

Posted by GitBox <gi...@apache.org>.
XD-DENG commented on pull request #13171:
URL: https://github.com/apache/airflow/pull/13171#issuecomment-748461705


   This is actually more tricky than it looks, because:
   - `urllib3.connection.HTTPSConnection` is child class of `urllib3.connection.HTTPConnection` ([ref](https://urllib3.readthedocs.io/en/latest/reference/urllib3.connection.html#urllib3.connection.HTTPConnection.default_socket_options))
   - augmented assignment has special handling on classes and block scopes ([ref](https://www.python.org/dev/peps/pep-0577/#augmented-assignment-to-names-in-block-scopes))
   
   For example, below I have two chunks of identical code with only one difference (using augmented assignment or not), inside I try to update for **HTTPS** connection, then also check **HTTP** connection.
   
   ### Original Code
   
   ```python
   from urllib3.connection import HTTPConnection, HTTPSConnection
   
   socket_options = [
       (6,6,6),
       (8,8,8)
   ]
   
   HTTPSConnection.default_socket_options = HTTPSConnection.default_socket_options + socket_options
   print(HTTPSConnection.default_socket_options)
   print(HTTPConnection.default_socket_options)
   ```
   It prints
   ```
   [(6, 1, 1), (6, 6, 6), (8, 8, 8)]
   [(6, 1, 1)]
   ```
   
   
   ### Using augmented assignment
   
   ```python
   
   from urllib3.connection import HTTPConnection, HTTPSConnection
   
   socket_options = [
       (6,6,6),
       (8,8,8)
   ]
   
   HTTPSConnection.default_socket_options += socket_options
   print(HTTPSConnection.default_socket_options)
   print(HTTPConnection.default_socket_options)
   ```
   
   It prints
   ```
   [(6, 1, 1), (6, 6, 6), (8, 8, 8)]
   [(6, 1, 1), (6, 6, 6), (8, 8, 8)]
   ```
   
   
   So I would like to suggest abandoning this change. Let me know your thoughts on this?


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[GitHub] [airflow] kaxil closed pull request #13171: Replace assignment with augmented assignment

Posted by GitBox <gi...@apache.org>.
kaxil closed pull request #13171:
URL: https://github.com/apache/airflow/pull/13171


   


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[GitHub] [airflow] XD-DENG commented on pull request #13171: Replace assignment with augmented assignment

Posted by GitBox <gi...@apache.org>.
XD-DENG commented on pull request #13171:
URL: https://github.com/apache/airflow/pull/13171#issuecomment-748458819


   I haven't figured out why yet, but this change appends the `socket_options ` into `HTTPSConnection.default_socket_options`/`HTTPConnection.default_socket_options` for two times (while it should be once only), which is causing the CI failure.


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[GitHub] [airflow] kaxil commented on pull request #13171: Replace assignment with augmented assignment

Posted by GitBox <gi...@apache.org>.
kaxil commented on pull request #13171:
URL: https://github.com/apache/airflow/pull/13171#issuecomment-748465808


   Yup I agree


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