[
https://issues.apache.org/jira/browse/FLINK-34195?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17809826#comment-17809826
]
Xingbo Huang commented on FLINK-34195:
--------------------------------------
[~mapohl] Thanks for the great work. Since the second version of PyFlink's
inception, 1.10, it has only supported Python3. I believe that using `python3`
rather than `python` is indeed a more standard practice. For information on
which Python version PyFlink supports, one method is to check the Flink
documentationhttps://nightlies.apache.org/flink/flink-docs-release-1.18/docs/dev/python/installation/,
and another method is to view the Python package meta on PyPI
https://pypi.org/project/apache-flink/.
> PythonEnvUtils creates python environment instead of python3
> ------------------------------------------------------------
>
> Key: FLINK-34195
> URL: https://issues.apache.org/jira/browse/FLINK-34195
> Project: Flink
> Issue Type: Bug
> Components: API / Python, Build System / CI
> Reporter: Matthias Pohl
> Priority: Major
>
> I was looking into the Python installation of the Flink test suite because I
> working on updating the CI Docker image from 16.04 (Xenial) to 22.04
> (FLINK-34194). I noticed that there is test code still relying on the
> {{python}} command instead of {{{}python3{}}}. For Ubuntu 16.04 that meant
> relying on Python 2. Therefore, we have tests still relying on Python 2 as
> far as I understand.
> I couldn't find any documentation or mailing list discussion on major Python
> version support. But AFAIU, we're relying on Python3 (based on the e2e tests)
> which makes these tests out-dated.
> Additionally,
> [python.client.executable|https://github.com/apache/flink/blob/50cb4ee8c545cd38d0efee014939df91c2c9c65f/flink-python/src/main/java/org/apache/flink/python/PythonOptions.java#L170]
> relies on {{{}python{}}}.
> Should we make it more explicit in our test code that we're actually
> expecting python3? Additionally, should that be mentioned somewhere in the
> docs? Or if it's already mentioned, could you point me to it? (As someone
> looking into PyFlink for the "first" time) I would have expected something
> like that being mentioned on the [PyFlink
> overview|https://nightlies.apache.org/flink/flink-docs-master/docs/dev/python/overview/].
> Or is it the default to assume nowadays that {{python}} refers to
> {{python3?}}
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
