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  • Should it be possible to remove python 2.7 from Pi running buster?

    From Chris Green@3:770/3 to All on Tue Dec 29 21:59:18 2020
    Python 2.7 went out of support at the beginning of 2020, is it now
    possible to remove it from buster installations?

    --
    Chris Green
    ·

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  • From Dennis Lee Bieber@3:770/3 to All on Tue Dec 29 17:38:53 2020
    On Tue, 29 Dec 2020 21:59:18 +0000, Chris Green <cl@isbd.net> declaimed the following:

    Python 2.7 went out of support at the beginning of 2020, is it now
    possible to remove it from buster installations?

    Not really...

    https://fullcirclemagazine.org/2019/08/28/debian-and-ubuntu-plan-to-remove-python-2/
    """
    Debian 10 will continue to support Python 2 until the end of support for Buster.
    """

    https://wiki.debian.org/Python
    """
    Debian Bullseye contains 2.7, 3.7, 3.8
    """

    https://wiki.debian.org/Python/2Removal
    """
    I hear there will still be a Python 2 interpreter in bullseye, can I use
    that in my package?

    No you can't. From #975014:

    Debian Bullseye includes a version of Python 2.7 (and a short list of
    related packages like setuptools still built Python 2 packages). However,
    these are only included for building a few applications which still require Python 2 as part of their build process. Python 2 is not supported for
    running applications and there won't be any security updates for Python
    2 in Bullseye.
    """


    --
    Wulfraed Dennis Lee Bieber AF6VN
    wlfraed@ix.netcom.com http://wlfraed.microdiversity.freeddns.org/

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  • From Martin Gregorie@3:770/3 to Chris Green on Tue Dec 29 23:29:39 2020
    On Tue, 29 Dec 2020 21:59:18 +0000, Chris Green wrote:

    Python 2.7 went out of support at the beginning of 2020, is it now
    possible to remove it from buster installations?

    Check whether you haven't got any Raspbian packages that use Python 2.7
    and no other Python programs from 2rd parties or written by yourself.

    If you don't have any of these dependencies it can be removed.

    To search for them:

    - if you write Python, grep your local source files for strings unique to
    Python 2.7 such as library functions used by 2.7 and not by 3.7

    - running "apt-get --no-remove autoremove" should report any packages
    that were installed to satisfy dependencies without removing them.
    **** caution I've not tried this, but its documented in the apt-get
    **** manpage.


    --
    --
    Martin | martin at
    Gregorie | gregorie dot org

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  • From Chris Green@3:770/3 to Martin Gregorie on Wed Dec 30 09:58:01 2020
    Martin Gregorie <martin@mydomain.invalid> wrote:
    On Tue, 29 Dec 2020 21:59:18 +0000, Chris Green wrote:

    Python 2.7 went out of support at the beginning of 2020, is it now
    possible to remove it from buster installations?

    Check whether you haven't got any Raspbian packages that use Python 2.7
    and no other Python programs from 2rd parties or written by yourself.

    If you don't have any of these dependencies it can be removed.

    Yes, this is what I assumed would be true but I just wanted to check
    that there aren't any system dependencies on Python 2.7.


    To search for them:

    - if you write Python, grep your local source files for strings unique to
    Python 2.7 such as library functions used by 2.7 and not by 3.7

    I moved and/or converted all my Python code to Python three a while ago.


    - running "apt-get --no-remove autoremove" should report any packages
    that were installed to satisfy dependencies without removing them.
    **** caution I've not tried this, but its documented in the apt-get
    **** manpage.

    Well one can simply do "apt remove python2.7" and see if it removes
    anything significant with it (apart from the associated libraries of
    course, which should go). You only have to say "N" when it asks if you
    want to continue so it doesn't then do the removal.

    --
    Chris Green
    ·

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  • From alister@3:770/3 to Martin Gregorie on Wed Dec 30 10:14:46 2020
    On Tue, 29 Dec 2020 23:29:39 +0000, Martin Gregorie wrote:

    On Tue, 29 Dec 2020 21:59:18 +0000, Chris Green wrote:

    Python 2.7 went out of support at the beginning of 2020, is it now
    possible to remove it from buster installations?

    Check whether you haven't got any Raspbian packages that use Python 2.7
    and no other Python programs from 2rd parties or written by yourself.

    If you don't have any of these dependencies it can be removed.

    To search for them:

    - if you write Python, grep your local source files for strings unique
    to
    Python 2.7 such as library functions used by 2.7 and not by 3.7

    - running "apt-get --no-remove autoremove" should report any packages
    that were installed to satisfy dependencies without removing them.
    **** caution I've not tried this, but its documented in the apt-get
    **** manpage.

    when I installed software from Adafruit for an audio hat (actually their
    Voice Bonnet) it issued a warning that is was going to change the default system python to Python3, so fare I have experienced no issues
    this may be a safer way to conver to python3 as python2 is still
    available if needed.




    --
    The system will be down for 10 days for preventive maintenance.

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  • From Pancho@3:770/3 to Chris Green on Wed Dec 30 11:39:49 2020
    On 29/12/2020 21:59, Chris Green wrote:
    Python 2.7 went out of support at the beginning of 2020, is it now
    possible to remove it from buster installations?


    Why bother? Let the distro packagers do it when they consider it safe.

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  • From Chris Green@3:770/3 to Pancho on Wed Dec 30 12:18:25 2020
    Pancho <Pancho.Dontmaileme@outlook.com> wrote:
    On 29/12/2020 21:59, Chris Green wrote:
    Python 2.7 went out of support at the beginning of 2020, is it now
    possible to remove it from buster installations?


    Why bother? Let the distro packagers do it when they consider it safe.

    But they won't. If you have python2.7 installed it will simply stay
    there for ever unless you remove it yourself explicitly.

    It's like if you have any 'top level' program installed, it will stay
    there until you remove it. Python 3.x isn't a new version of Python
    2.7, it's a different/new program.

    Python 2.7 would probably disappear if you upgrade to the next version
    of Raspbian/Debian.

    --
    Chris Green
    ·

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  • From Martin Gregorie@3:770/3 to Chris Green on Wed Dec 30 14:14:26 2020
    On Wed, 30 Dec 2020 12:18:25 +0000, Chris Green wrote:

    Python 2.7 would probably disappear if you upgrade to the next version
    of Raspbian/Debian.

    Thats the current position for Fedora: now that Fedora 33 is out. This
    laptop is running F32, which I'll be upgrading to F33 later in January.
    It still has Python 2 software installed but there are no longer any
    Python 2 packages in its package library.

    But, although all distros will stop support for Python 2 at a similar
    time, the exact timing for each distro will depend on the speed at which packages that contain Python are upgraded from 2 to 3 by its package maintainers. I'm not surprised if Fedora is doing it before Raspbian
    since its a bit more on the bleeding edge than Raspbian or Debian are.


    --
    --
    Martin | martin at
    Gregorie | gregorie dot org

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  • From Pancho@3:770/3 to Chris Green on Wed Dec 30 19:42:02 2020
    On 30/12/2020 12:18, Chris Green wrote:

    Python 2.7 would probably disappear if you upgrade to the next version
    of Raspbian/Debian.


    It won't, a quick check shows Debian Bullseye contains 2.7, but that is
    what I meant, eventually 2.7 will disappear in a new release.

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  • From Anssi Saari@3:770/3 to Chris Green on Thu Dec 31 00:29:38 2020
    Chris Green <cl@isbd.net> writes:

    Python 2.7 would probably disappear if you upgrade to the next version
    of Raspbian/Debian.

    Doubtful. I actually just cleaned over 100 packages from my Debian 10
    desktop that were from Debian 9. They may have come from quite a few
    versions ago since they weren't exactly familiar. Many were libraries
    with no dependencies. Part of the upgrade process actually is this kind
    of cleanup but I at least have been slacking. According to
    aptitude search '~o' I still have a bunch of packages marked obsolete
    but at least about a quarter of them are the transitional dummy kind so
    actual content taking space is negligible.

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