[jira] [Commented] (BEAM-9324) Python SDK Incompatibility with Cython

["Yi Hu (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-9324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17541604#comment-17541604 ] 

Yi Hu commented on BEAM-9324:
-----------------------------

This is due to Cython.Shadow.cast(Receiver, value) attempting to run Receiver(value) (probably very old code in Python 2 age where "old" class did not have __call__). It is a bug of Cython 0.x and will be fixed in upcoming v3.0 (cython/cython@3149eb8). Provided a workaround before cython 3.0 is released (https://github.com/apache/beam/pull/17728), which should be removed once upgraded to Cython 3.



> Python SDK Incompatibility with Cython
> --------------------------------------
>
>                 Key: BEAM-9324
>                 URL: https://issues.apache.org/jira/browse/BEAM-9324
>             Project: Beam
>          Issue Type: Bug
>          Components: examples-python, runner-core, sdk-py-core
>    Affects Versions: 2.19.0
>            Reporter: Tommy Yong
>            Assignee: Yi Hu
>            Priority: P3
>          Time Spent: 1h 40m
>  Remaining Estimate: 0h
>
> When executing a sample apache beam pipeline, the following error appears:
> {code:java}
> TypeError: Receiver() takes no argument
> {code}
> Full-stack trace: [https://stackoverflow.com/questions/60052098/apache-beam-on-python-typeerror-receiver-takes-no-arguments/60058770?noredirect=1#comment106234439_60058770]
> The error appears to come from Cython packages/modules. However, after uninstalling Cython, the error goes away. Appears to have some sort of incompatibility with Cython.
> {{}}



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