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https://issues.apache.org/jira/browse/CASSANDRA-15659?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eduard Tudenhoefner updated CASSANDRA-15659:
--------------------------------------------
Reviewers: Michael Semb Wever (was: Eduard Tudenhoefner, Michael Semb
Wever)
> Better support of Python 3 for cqlsh
> ------------------------------------
>
> Key: CASSANDRA-15659
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15659
> Project: Cassandra
> Issue Type: Task
> Components: Tool/cqlsh
> Reporter: Stefan Miklosovic
> Assignee: Eduard Tudenhoefner
> Priority: Normal
> Labels: pull-request-available
> Fix For: 4.0-alpha
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> h2. From mailing list:
> [https://lists.apache.org/thread.html/r377099b632c62b641e4feef5b738084fc5369b0c7157fae867853597%40%3Cdev.cassandra.apache.org%3E]
>
> As of today (24/3/2020) and current trunk, there is Python 3.6 supported (1)
> but there is not any 3.6 version ootb in Debian for example. E.g. Buster has
> Python 3.7 and other (recent) releases have version 2.7. This means that if
> one wants to use Python 3 in Debian, he has to use 3.6 but it is not in the
> repository so he has to download / compile / install it on his own.
> There should be some sane Python 3 version supported which is as well present
> in Debian repository (or requirement to run with 3.6 should be relaxed) .
> (1)
> [https://github.com/apache/cassandra/blob/bf9a1d487b9ba469e8d740cf7d1cd419535a7e79/bin/cqlsh#L57-L65]
> h2. Summary of work that was done:
> I relaxed the requirement of *cqlsh* only working with Python 2.7 & 3.6 by
> allowing Python 3.6+.
> Note that I left the constraint for Python 3.6 being the minimum Python3
> version.
> As [~ptbannister] pointed out, we could remove the Python 3.6 min version
> once we remove Python 2.7 support, as otherwise testing with lots of
> different Python versions will get costly.
> 2 Dockerfiles were added in *pylib* for minimal local testing of *cqlsh*
> starting up with Python 3.7 & 3.8 and that both revealed
> CASSANDRA-15572 and CASSANDRA-15573.
> CASSANDRA-15572 was fixed here as it was a one-liner. And I'm going to
> tackle CASSANDRA-15573 later.
> Python 3.8 testing was added to the CircleCI config so that we can actually
> see what else breaks with newer Python versions.
> A new Docker images with Ubuntu 19.10 was required for testing
> ([https://github.com/apache/cassandra-builds/pull/17]). This docker image
> sets up Python 2.7/3.6/3.7/3.8 with their respective virtual environments,
> which are then being used by the CircleCI yaml.
> The image *spod/cassandra-testing-ubuntu1810-java11-w-dependencies:20190306*
> couldn't be updated unfortunately because it can't be built anymore, due to
> Ubuntu 18.10 being EOL.
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