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Command to query “Python versions that are installed *with* standard library”

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  Command to query “Python versions that are  installed *with* standard library” Ben Finney <bignose@debian.org> - 2019-01-24 00:20 +0100
    Re: Command to query “Python versions that are installed *with* standard library” Matthias Klose <doko@debian.org> - 2019-01-24 09:30 +0100
      Re: Command to query “Python versions that are  installed *with* standard library” Ben Finney <bignose@debian.org> - 2019-01-25 06:30 +0100
    Re: Command to query “Python versions that are installed *with* standard library” Dmitry Shachnev <mitya57@debian.org> - 2019-01-24 13:30 +0100
      Re: Command to query “Python versions that are  installed *with* standard library” Ben Finney <bignose@debian.org> - 2019-01-25 06:30 +0100

#11273 — Command to query “Python versions that are installed *with* standard library”

Howdy all,

What is a ‘py3versions’ (or alternative) command that can be run in
AutoPkgTest, to query the Python versions that are installed on this
machine *with* their standard library?

The ‘pythonX.Y-minimal’ packages can be installed *without* standard
library, but will still appear in the ‘py3versions --installed’ output.

This means it's possible to have an AutoPkgTest test that attempts to
run a module for all the ‘py3versions --installed’ versions, then fail
because an import of a standard library module fails.

What command, hopefully as simple as ‘py3versions --installed’, can be
used in AutoPkgTest to interrogate *only* those Python versions on the
local machine that have their standard library installed?

-- 
 \          “Friendship is born at that moment when one person says to |
  `\    another, ‘What! You too? I thought I was the only one!’” —C.S. |
_o__)                                                            Lewis |
Ben Finney

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#11274 — Re: Command to query “Python versions that are installed *with* standard library”

On 24.01.19 00:16, Ben Finney wrote:
> Howdy all,
> 
> What is a ‘py3versions’ (or alternative) command that can be run in
> AutoPkgTest, to query the Python versions that are installed on this
> machine *with* their standard library?
> 
> The ‘pythonX.Y-minimal’ packages can be installed *without* standard
> library, but will still appear in the ‘py3versions --installed’ output.
> 
> This means it's possible to have an AutoPkgTest test that attempts to
> run a module for all the ‘py3versions --installed’ versions, then fail
> because an import of a standard library module fails.
> 
> What command, hopefully as simple as ‘py3versions --installed’, can be
> used in AutoPkgTest to interrogate *only* those Python versions on the
> local machine that have their standard library installed?

we currently can't do that, until python3.6 gets removed. I assume it's still on
some images?

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#11276

Matthias Klose <doko@debian.org> writes:

> On 24.01.19 00:16, Ben Finney wrote:
> > What command, hopefully as simple as ‘py3versions --installed’, can
> > be used in AutoPkgTest to interrogate *only* those Python versions
> > on the local machine that have their standard library installed?
>
> we currently can't do that, until python3.6 gets removed.

Can you explain that connection?

What is it about Python <= 3.6 that prevents interrogating the installed
versions in the way I've described?

-- 
 \       “He was the mildest-mannered man / That ever scuttled ship or |
  `\       cut a throat.” —“Lord” George Gordon Noel Byron, _Don Juan_ |
_o__)                                                                  |
Ben Finney

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#11275 — Re: Command to query “Python versions that are installed *with* standard library”

[Multipart message — attachments visible in raw view] — view raw

Hi Ben,

On Thu, Jan 24, 2019 at 10:16:44AM +1100, Ben Finney wrote:
> Howdy all,
>
> What is a ‘py3versions’ (or alternative) command that can be run in
> AutoPkgTest, to query the Python versions that are installed on this
> machine *with* their standard library?
>
> The ‘pythonX.Y-minimal’ packages can be installed *without* standard
> library, but will still appear in the ‘py3versions --installed’ output.
>
> This means it's possible to have an AutoPkgTest test that attempts to
> run a module for all the ‘py3versions --installed’ versions, then fail
> because an import of a standard library module fails.
>
> What command, hopefully as simple as ‘py3versions --installed’, can be
> used in AutoPkgTest to interrogate *only* those Python versions on the
> local machine that have their standard library installed?

I usually use py3versions --supported and make the autopkgtest depend on
python3-all.

--
Dmitry Shachnev

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#11277

Dmitry Shachnev <mitya57@debian.org> writes:

> I usually use py3versions --supported and make the autopkgtest depend
> on python3-all.

Thank you, I had forgotten that AutoPkgTest dependencies are declared
separately from the build dependencies. That works fine.

-- 
 \           “The long-term solution to mountains of waste is not more |
  `\      landfill sites but fewer shopping centres.” —Clive Hamilton, |
_o__)                                                _Affluenza_, 2005 |
Ben Finney

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