[OE-core] Missing venv module in Python 3

[Jonathan Haigh]

Hi Ross,
Thank you for you prompt reply.

Apologies if I was not clear enough in my previous message.

python3-pyvenv is indeed a package that gets built with python3. However, pyvenv is just a short script that imports the venv module. Including the python3-pyvenv package does not solve the issue as the creation of a virtual environment using "python3 -m venv my_env" or "pyvenv my_env" results in a error about the missing venv module.

See the entire content of pyvenv:
---------------------------------------------------
#! /usr/bin/python3.5
if __name__ == '__main__':
    import sys
    rc = 1
    try:
        import venv
        venv.main()
        rc = 0
    except Exception as e:
        print('Error: %s' % e, file=sys.stderr)
    sys.exit(rc)
----------------------------------------------------

The venv package (https://docs.python.org/3/library/venv.html) itself is missing although its source is available within Python 3.5 (https://www.python.org/ftp/python/3.5.6/Python-3.5.6.tgz). As mentioned earlier, it seems the issue is because there is no entry in the manifest from which the various Python 3 modules are created (https://github.com/openembedded/openembedded-core/blob/master/meta/recipes-devtools/python/python3/python3-manifest.json).

The manifest is generated from https://github.com/openembedded/openembedded-core/blob/master/meta/recipes-devtools/python/python3/create_manifest3.py, and it does not seem obvious to me how to go about correctly adding a new module to the manifest, using create_manifest3.py or otherwise.

Can you, or others on the mailing list, provide some guidance on how to go about adding the venv module to the manifest?

Regards,

Hugues/Jonathan


________________________________
From: Burton, Ross <ross.burton at intel.com>
Sent: 18 October 2018 14:56
To: Jonathan Haigh
Cc: OE-core; Jeremy Johnson; Alejandro Enedino Hernandez Samaniego; Hugues Kamba
Subject: Re: [OE-core] Missing venv module in Python 3

venv is packaged in python3-pyvenv.  Patches welcome to get that
installed out of the box.

Ross
On Thu, 18 Oct 2018 at 14:35, Jonathan Haigh <Jonathan.Haigh at arm.com> wrote:
>
> Hello,
>
> I have noticed that the venv module is not available with Python 3 in Yocto.
> This is possibly because there is no entry for it in openembedded-core/meta/recipes-devtools/python/python3/python3-manifest.json
>
> Could  you please provide guidance or a fix to make the module available?
>
> Thank you
>
> Jonathan Haigh on behalf of Hugues Kamba
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