[jira] [Updated] (CASSANDRA-18369) Importing cassandra driver causes modern pytest to fail in certain circumstances

["Brandon Williams (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-18369?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Brandon Williams updated CASSANDRA-18369:
-----------------------------------------
    Resolution: Invalid
        Status: Resolved  (was: Triage Needed)

You need to report this to the python driver project: https://github.com/datastax/python-driver

We don't cover the drivers here (yet.)

> Importing cassandra driver causes modern pytest to fail in certain circumstances
> --------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-18369
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-18369
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Jarek Potiuk
>            Priority: Normal
>
> When collecting on running test without exclusion on Pytest test name, importing cassandra driver causes a very strangely looking error:
>  
> {quote}# from cassandra.cluster import Cluster
> # cassandra/cluster.py:48: in init cassandra.cluster
> # ???
> # cassandra/connection.py:40: in init cassandra.connection
> # ???
> # cassandra/protocol.py:698: in genexpr
> # ???
> # cassandra/protocol.py:698: in genexpr
> # ???
> # E KeyError: '@py_builtins'{quote}
> This happened for Apache Airflow when we wanted to enable pytest collection to include all files, rather than only "test_*.py" files, because we found that there were at least few modules in airlfow that did not start with "test". 
> It turned out that the culprit was Assert Rewrite done by pytest that tried to rewrite "type_codes.py" module of Cassandra.
> One of the ways to avoid the problem is to disable assert rewrite by "–assert=plain".  However then asserts are not as useful. Better solution (PR is coming) is to add PYTEST_DONT_REWRITE in the docstring:
> https://docs.pytest.org/en/latest/how-to/assert.html#disabling-assert-rewriting
> For now we are mitigating that issue in Airflow by manually patching cassandra code, however better solution will be to add the PYTEST_DONT_REWRITE directive directly in Cassandra's Python driver's repository.
> Fix is coming.



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