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Posted to issues@beam.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2019/06/03 21:56:00 UTC
[jira] [Work logged] (BEAM-5878) Support DoFns with Keyword-only
arguments in Python 3.
[ https://issues.apache.org/jira/browse/BEAM-5878?focusedWorklogId=253413&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-253413 ]
ASF GitHub Bot logged work on BEAM-5878:
----------------------------------------
Author: ASF GitHub Bot
Created on: 03/Jun/19 21:55
Start Date: 03/Jun/19 21:55
Worklog Time Spent: 10m
Work Description: apilloud commented on issue #8505: [BEAM-5878] add tests for kwonly args in python 3
URL: https://github.com/apache/beam/pull/8505#issuecomment-498441270
After this change beam_PostCommit_Python_Verify :sdks:python:postCommitIT and other tests are failing due to a syntax error. I filed an issue: https://issues.apache.org/jira/browse/BEAM-7481
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Issue Time Tracking
-------------------
Worklog Id: (was: 253413)
Time Spent: 4h 50m (was: 4h 40m)
> Support DoFns with Keyword-only arguments in Python 3.
> ------------------------------------------------------
>
> Key: BEAM-5878
> URL: https://issues.apache.org/jira/browse/BEAM-5878
> Project: Beam
> Issue Type: Sub-task
> Components: sdk-py-core
> Reporter: Valentyn Tymofieiev
> Assignee: Juta Staes
> Priority: Minor
> Time Spent: 4h 50m
> Remaining Estimate: 0h
>
> Python 3.0 [adds a possibility|https://www.python.org/dev/peps/pep-3102/] to define functions with keyword-only arguments.
> Currently Beam does not handle them correctly. [~ruoyu] pointed out [one place|https://github.com/apache/beam/blob/a56ce43109c97c739fa08adca45528c41e3c925c/sdks/python/apache_beam/typehints/decorators.py#L118] in our codebase that we should fix: in Python in 3.0 inspect.getargspec() will fail on functions with keyword-only arguments, but a new method [inspect.getfullargspec()|https://docs.python.org/3/library/inspect.html#inspect.getfullargspec] supports them.
> There may be implications for our (best-effort) type-hints machinery.
> We should also add a Py3-only unit tests that covers DoFn's with keyword-only arguments once Beam Python 3 tests are in a good shape.
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