PYTHON TARGETS switch, anyone else nervous today?

[stonespheres]

Oh dear, today is turning into quite a day! The joys of student life have led to a rather large list of packages required on my system, 196 packages to rebuild, my poor laptop is going to be my primary heat source, lucky it's winter here!

Has anyone run into any problems with the switch? I had to set some single targets to get @world to start updating. Aside from that nothing too unusual, but there's still time..

[eccerr0r]

Just 196? ... heh (I've seen 500+ quite frequently...ack)

Really I don't think that the python updates were a problem other than portage figuring out dependency, and versions of python getting deleted with no other option available.

If your emerge -uDNp @world returns with no errors, you're usually fine unless you haven't deleted python2_7 yet... I've not seen way too many python3_(x) to python3_(x+1) failing too badly, fortunately.

Recently I've not had to force targets to resolve conflicts luckily... Once more, depends on what you have installed.

[stonespheres]

Just 196? ... heh (I've seen 500+ quite frequently...ack)

I guess I'll count myself lucky then!

If your emerge -uDNp @world returns with no errors, you're usually fine unless you haven't deleted python2_7 yet... I've not seen way too many python3_(x) to python3_(x+1) failing too badly, fortunately.

I'm sure I never even had it, my install is only about a month or two old.

Code: Select all

eselect python --list 

gives me

Code: Select all

Available Python interpreters, in order of preference:
  [1]   python3.9
  [2]   python3.8 (fallback)

Recently I've not had to force targets to resolve conflicts luckily...

Fingers crossed...

[figueroa]

Yeah, and it went well through steps 1 and 2 of the "Safer Upgrade Approach." Re:

Code: Select all

eselect news read 2021-05-05-python3-9

which was for step 3 setting in /etc/portage/package.use:

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    */* PYTHON_TARGETS: -* python3_9
    */* PYTHON_SINGLE_TARGET: -* python3_9

At this step I first had to also set in /etcportage/package.use:

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=games-puzzle/pathological-1.1.3_p16-r1 python_single_target_python3_8
=media-gfx/img2pdf-0.3.6 python_targets_python3_8
=dev-python/pypax-0.9.5 python_targets_python3_8

After which I get:

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# emerge -uDU @world -p

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R    ] dev-lang/python-exec-conf-2.4.6  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] sys-libs/libseccomp-2.5.1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] sys-apps/file-5.40-r2  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-libs/boost-1.76.0-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] sys-libs/libcap-ng-0.8.2-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-libs/libxml2-2.9.12-r2  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] sys-apps/util-linux-2.36.2  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] sys-apps/kmod-28  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-util/meson-format-array-0  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] x11-base/xcb-proto-1.14.1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] sys-libs/cracklib-2.9.7  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/PyQt5-sip-4.19.25  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/sip-4.19.25  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/bsddb3-6.2.9  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/ptyprocess-0.7.0  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] sys-process/iotop-0.6  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-libs/newt-0.52.21-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-libs/libbytesize-2.5  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/pexpect-4.8.0-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-libs/libpwquality-1.4.4  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-libs/libnl-3.5.0  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/dbus-python-1.2.16-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/notify2-0.3.1-r2  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-util/meson-0.57.2  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/six-1.15.0-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/markupsafe-1.1.1-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/pygments-2.8.1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/pyparsing-2.4.7-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/webencodings-0.5.1-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/python-distutils-extra-2.45  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/chardet-4.0.0  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/idna-3.1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/PySocks-1.7.1-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/ply-3.11-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/distro-1.5.0-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/m2crypto-0.37.1-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/isodate-0.6.0-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/html5lib-1.1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/urllib3-1.26.4  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/pycparser-2.20-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/jinja-2.11.3  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/mako-1.1.4  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/docutils-0.16-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/lxml-4.6.3-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] media-gfx/scour-0.38.2  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] media-libs/gexiv2-0.12.2  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/configobj-5.0.6-r1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/requests-2.25.1-r2  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/cffi-1.14.5  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/rdflib-5.0.0  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/ssl-fetch-0.4  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] virtual/python-cffi-1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/pycryptodome-3.10.1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] app-portage/mirrorselect-2.2.6-r2  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] net-misc/youtube-dl-2021.04.26  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/pycairo-1.20.0  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/pygobject-3.40.1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/reportlab-3.5.67  PYTHON_TARGETS="-python3_8*" 
[ebuild   R   ~] games-puzzle/monsterz-0.7.1_p11  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-util/catfish-4.16.0  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] dev-python/PyQt5-5.15.2  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] app-portage/gemato-16.2  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] app-crypt/gpgme-1.14.0  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] sys-apps/portage-3.0.18  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] app-portage/gentoolkit-0.5.1  PYTHON_TARGETS="-python3_8*" 
[ebuild   R    ] app-portage/portpeek-3.2.0  PYTHON_TARGETS="-python3_8*" 

WARNING: One or more updates/rebuilds have been skipped due to a dependency conflict:

dev-python/setuptools:0

  (dev-python/setuptools-56.0.0:0/0::gentoo, ebuild scheduled for merge) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_9 (-pypy3) -python3_8" conflicts with
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_pypy3(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-),-python_single_target_python3_10(-)] required by (dev-python/pillow-8.2.0:0/0::gentoo, installed) USE="jpeg lcms tiff truetype xcb zlib -examples -imagequant -jpeg2k -test -tk -webp" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 (-pypy3) (-python3_10)"
                                                                                                                                                                                                                                    
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_pypy3(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-),-python_single_target_python3_10(-)] required by (dev-python/cython-0.29.23:0/0::gentoo, installed) USE="-doc -emacs -test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 (-pypy3) (-python3_10)"
                                                                                                                                                                                                                                    
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_pypy3(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-),-python_single_target_python3_10(-)] required by (dev-python/toml-0.10.2:0/0::gentoo, installed) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 (-pypy3) (-python3_10)"
                                                                                                                                                                                                                                    
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-)] required by (dev-python/numpy-1.20.2-r1:0/0::gentoo, installed) USE="-doc -lapack -test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9"
                                                                                                                                                                 
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_pypy3(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-),-python_single_target_python3_10(-)] required by (dev-python/olefile-0.46-r1:0/0::gentoo, installed) USE="-doc -test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 (-pypy3) (-python3_10)"
                                                                                                                                                                                                                                    
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),-python_single_target_python3_8(-)] required by (media-gfx/img2pdf-0.3.6:0/0::gentoo, installed) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 -python3_7"
                                                                                                  
    dev-python/setuptools[python_targets_python3_8(-),-python_single_target_python3_8(-)] required by (dev-python/pypax-0.9.5:0/0::gentoo, installed) USE="ptpax xtpax" ABI_X86="(64)" PYTHON_TARGETS="python3_8 -python3_7"
                                                                                         
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-)] required by (dev-python/pygame-1.9.6-r1:0/0::gentoo, installed) USE="X opengl -doc -examples -midi -test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9"
                                                                                                                                                                 
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_pypy3(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-),-python_single_target_python3_10(-)] required by (dev-python/setuptools_scm-6.0.1-r1:0/0::gentoo, installed) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 (-pypy3) (-python3_10)"
    
dev-python/certifi:0

  (dev-python/certifi-10001-r1:0/0::gentoo, ebuild scheduled for merge) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_9 (-pypy3) (-python3_10) -python3_8" conflicts with
    >=dev-python/certifi-2016.9.26[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_pypy3(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-)] required by (dev-python/setuptools-56.0.0:0/0::gentoo, installed) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 (-pypy3)"

dev-python/setuptools_scm:0

  (dev-python/setuptools_scm-6.0.1-r1:0/0::gentoo, ebuild scheduled for merge) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_9 (-pypy3) (-python3_10) -python3_8" conflicts with
    dev-python/setuptools_scm[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_pypy3(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-)] required by (dev-python/setuptools-56.0.0:0/0::gentoo, installed) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 (-pypy3)"

dev-python/toml:0

  (dev-python/toml-0.10.2:0/0::gentoo, ebuild scheduled for merge) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_9 (-pypy3) (-python3_10) -python3_8" conflicts with
    dev-python/toml[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_pypy3(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-),-python_single_target_python3_10(-)] required by (dev-python/setuptools_scm-6.0.1-r1:0/0::gentoo, installed) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 (-pypy3) (-python3_10)"

dev-python/pillow:0

  (dev-python/pillow-8.2.0:0/0::gentoo, ebuild scheduled for merge) USE="jpeg lcms tiff truetype xcb zlib -examples -imagequant -jpeg2k -test -tk -webp" ABI_X86="(64)" PYTHON_TARGETS="python3_9 (-pypy3) (-python3_10) -python3_8" conflicts with
    dev-python/pillow[python_targets_python3_8(-),-python_single_target_python3_8(-)] required by (media-gfx/img2pdf-0.3.6:0/0::gentoo, installed) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 -python3_7"

dev-python/olefile:0

  (dev-python/olefile-0.46-r1:0/0::gentoo, ebuild scheduled for merge) USE="-doc -test" ABI_X86="(64)" PYTHON_TARGETS="python3_9 (-pypy3) (-python3_10) -python3_8" conflicts with
    dev-python/olefile[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_pypy3(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-),-python_single_target_python3_10(-)] required by (dev-python/pillow-8.2.0:0/0::gentoo, installed) USE="jpeg lcms tiff truetype xcb zlib -examples -imagequant -jpeg2k -test -tk -webp" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 (-pypy3) (-python3_10)"

dev-python/numpy:0

  (dev-python/numpy-1.20.2-r1:0/0::gentoo, ebuild scheduled for merge) USE="-doc -lapack -test" ABI_X86="(64)" PYTHON_TARGETS="python3_9 -python3_8" conflicts with
    dev-python/numpy[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-)] required by (dev-python/pygame-1.9.6-r1:0/0::gentoo, installed) USE="X opengl -doc -examples -midi -test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9"

dev-python/cython:0

  (dev-python/cython-0.29.23:0/0::gentoo, ebuild scheduled for merge) USE="-doc -emacs -test" ABI_X86="(64)" PYTHON_TARGETS="python3_9 (-pypy3) (-python3_10) -python3_8" conflicts with
    >=dev-python/cython-0.29.21[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-)] required by (dev-python/numpy-1.20.2-r1:0/0::gentoo, installed) USE="-doc -lapack -test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9"

I guess I'm done for the day. It's happy if I leave it at step 2 with:

Code: Select all

*/* PYTHON_TARGETS: -* python3_8 python3_9
*/* PYTHON_SINGLE_TARGET: -* python3_9

[Ionen]

I just emerge -uUDav @world and everything worked Bonus for getting boost/icu rebuilds at same time

Although that's systems I only use for testing, migratred to 3.9 last year already on the rest.

Worst that'll happen is running into some packages that haven't received 3.9 compat yet (but there's a push for that right now to handle stragglers), assuming don't have messy configs/overlays or old packages that should be depcleaned.

Edit: wrt img2pdf, ~testing version has python3_9 compat but isn't stable yet (feel free to fill stable requests for these), for pathological I'll have a look later to see if it works with 3.9.. then again it's still broken with pygame2

[figueroa]

I'm just about bog standard and stable amd64 with the exception of the ~ LXDE packages and these lame but entertaining games I barely look at:

Code: Select all

games-misc/bsd-games ~amd64
games-puzzle/ltris ~amd64
games-puzzle/monsterz ~amd64
games-puzzle/pathological ~amd64
games-arcade/emilia-pinball ~amd64

I'm thinking my 6am sync is likely to help me move forward. But, for now, my day is over.

[Ionen]

Code: Select all

games-puzzle/pathological ~amd64

Added 3.9 for that one, seems to run fine with it (albeit take it you're still using pygame1 wrt that older thread).

[cameta]

[ebuild U ] dev-qt/qtwebengine-5.15.2_p20210421:5/5.15::gentoo [5.15.2_p20210224:5/5.15::gentoo] USE="alsa jumbo-build system-ffmpeg system-icu widgets -bindist -debug -designer -geolocation -kerberos -pulseaudio -test" 0 KiB

* Messages for package dev-qt/qtwebengine-5.15.2_p20210421:

* ERROR: dev-qt/qtwebengine-5.15.2_p20210421::gentoo failed (compile phase):

Code: Select all

content/browser/appcache/appcache_host.cc -o obj/content/browser/browser/appcache_host.o
ninja: build stopped: subcommand failed.
make[3]: *** [Makefile.gn_run:557: run_ninja] Error 1
make[3]: Leaving directory '/var/tmp/portage/dev-qt/qtwebengine-5.15.2_p20210421/work/qtwebengine-5.15.2_p20210421_build/src/core'
make[2]: *** [Makefile:82: sub-gn_run-pro-make_first] Error 2
make[2]: Leaving directory '/var/tmp/portage/dev-qt/qtwebengine-5.15.2_p20210421/work/qtwebengine-5.15.2_p20210421_build/src/core'
make[1]: *** [Makefile:78: sub-core-make_first] Error 2
make[1]: Leaving directory '/var/tmp/portage/dev-qt/qtwebengine-5.15.2_p20210421/work/qtwebengine-5.15.2_p20210421_build/src'
make: *** [Makefile:49: sub-src-make_first] Error 2
 * ERROR: dev-qt/qtwebengine-5.15.2_p20210421::gentoo failed (compile phase):
 *   emake failed

[davidbryant]

I didn't take any special precautions, just blindly plunged ahead. I don't have any special Python requirements; I just do what the package managers say I ought to.

Yesterday I had to run "etc-update" a couple of times before my "emerge --ask --update --deep --with-bdeps=y @world"command would let me proceed. Everything went OK, but it did take quite a while to get done ... besides all the Python stuff, I also had to recompile Libreoffice, Firefox, and qtwebengine. That qtwebengine is a real killer. I have a pretty powerful PC (Dell XPS8930, 8 CPUs, 16 GB of memory), but it almost chokes on qtwebengine every time I have to compile/build it. Somewhere around step #20,000 (of 23,888) it chewed up all 16 GB of memory and started to swap stuff out. to virtual memory When that happens, the whole system freezes up (no mouse, even) for minutes at a time. It eventually gets back to running OK again, but the qtwebengine build runs for like two hours. It would be nice if the really big chunks of code could be broken into a few smaller pieces, so the compiler could spit out some smaller object modules.

Today I had some dependency conflicts involving Python 3.8. I said "emerge --ask --update --deep --changed-use @world", and it looks as if that's going to fix them all. We shall see. 72 packages to rebuild, about 25 still to go. I'm keeping my fingers crossed.

[fedeliallalinea]

cameta,
maybe ran you in out of memory error? you can check with dmesg. If isn't the case post your emerge --info and the build.log.

The rebuild of many package, including qtwebengine, is due to the stabilization of icu-69 required by new libreoffice-bin version.

[dmpogo]

emerge -uUD world worked without a hitch. even emerge -pv depclean afterwards showed that python-3.8 is not needed anymore

[jagdpanther]

All 300+ package updates worked without complaint on by Gentoo system. :)

The only question I have is why 'emerge -pv depclean' does NOT list python-3.8. which is still on my system?

I just ran 'equery depends =dev-lang/python-3.8.9_p2' and it seems to list all of the python dependent systems on my computer. For example:

Code: Select all

sys-apps/pcsc-lite-1.9.0 (python_single_target_python3_8 ? dev-lang/python:3.8)
                         (python_single_target_python3_9 ? dev-lang/python:3.9)
sys-apps/portage-3.0.18 (python_targets_python3_8 ? dev-lang/python:3.8[ssl(+)])
                        (python_targets_python3_9 ? dev-lang/python:3.9[ssl(+)])
                        (python_targets_python3_8 ? dev-lang/python:3.8[bzip2(+),threads(+)])
                        (python_targets_python3_9 ? dev-lang/python:3.9[bzip2(+),threads(+)])
sys-apps/usbutils-013-r1 (python_single_target_python3_8 ? dev-lang/python:3.8)
                         (python_single_target_python3_9 ? dev-lang/python:3.9)
sys-apps/util-linux-2.36.2 (python_targets_python3_8 ? dev-lang/python:3.8)
                           (python_targets_python3_9 ? dev-lang/python:3.9)
sys-auth/pambase-20210201.1 (dev-lang/python:3.9)
                            (dev-lang/python:3.8)

The only non-commented out line in /etc/python-exec/python-exec.conf is:
python3.9

I also read through the "Python 3.9 to become the default on 2021-06-01" and no longer have any PYTHON_TARGETS or PYTHON_SINGLE_TARGET set anywhere in /etc/portage/...

Any ideas on why Python-3.8 is still needed?

[figueroa]

Closing the circle, this morning my stable x86 server shows it will migrate to default Python 3.9 without apparent issue and no Python 3.8 requirements. I'll pull the trigger and it will run for a couple of hours updating 126 packages.

On my stable amd64 desktop, after 6 am EDT sync, it will also migrate packages to Python 3.9 with limited tweaks in /etc/portage/

Code: Select all

# grep img2pdf /etc/portage/package.accept_keywords
#media-gfx/img2pdf ~amd64
#=media-gfx/img2pdf-0.3.6 ~amd64
=media-gfx/img2pdf-0.4.1 ~amd64

There is no stable version of img2pdf and img2pdf-0.3.6 requires Python 3.8, so I'll upgrade that one.

And, img2pdf > img2pdf requires Python to be built with the tk USE flag, so:

Code: Select all

# grep python-3.9 /etc/portage/package.use
=dev-lang/python-3.9.4_p1 tk

and now it's updating 90 packages.

It's looking like I should have just waited till today, June 2, and this will have been the most seamless Python default change ever.

It's amazing that portage has matured to the point where one can be doing these large updates and just be sure that it will all go without error.

[finalturismo]

Oh dear, today is turning into quite a day! The joys of student life have led to a rather large list of packages required on my system, 196 packages to rebuild, my poor laptop is going to be my primary heat source, lucky it's winter here!

Has anyone run into any problems with the switch? I had to set some single targets to get @world to start updating. Aside from that nothing too unusual, but there's still time..

Python updates, we know how this goes..... I got my python targets locked in my make.conf file for reasons such as this. When i update i do it manually, before entering masking / unmasking hell.

Cant have any hiccups in a production environment until i have free time on hand.

[alamahant]

If i try to remove python3_8 from python targets and just leave python3_9
i get

Code: Select all

Total: 59 packages (59 reinstalls), Size of downloads: 0 KiB

WARNING: One or more updates/rebuilds have been skipped due to a dependency conflict:

dev-python/pygobject:3

  (dev-python/pygobject-3.40.1:3/3::gentoo, ebuild scheduled for merge) USE="cairo -examples -test" ABI_X86="(64)" PYTHON_TARGETS="python3_9 -python3_10 -python3_8" conflicts with
    dev-python/pygobject:3[python_targets_python3_8(-),-python_single_target_python3_8(-)] required by (sys-block/targetcli-fb-2.1.53:0/0::gentoo, installed) USE="" ABI_X86="(64)" PYTHON_TARGETS="python3_8"
                                                                                          

dev-python/six:0

  (dev-python/six-1.16.0:0/0::gentoo, ebuild scheduled for merge) USE="-doc -test" ABI_X86="(64)" PYTHON_TARGETS="python3_9 -pypy3 -python3_10 -python3_8" conflicts with
    dev-python/six[python_targets_python3_8(-),-python_single_target_python3_8(-)] required by (sys-block/targetcli-fb-2.1.53:0/0::gentoo, installed) USE="" ABI_X86="(64)" PYTHON_TARGETS="python3_8"
                                                                                  
    dev-python/six[python_targets_python3_8(-),-python_single_target_python3_8(-)] required by (dev-python/rtslib-fb-2.1.74:0/0::gentoo, installed) USE="" ABI_X86="(64)" PYTHON_TARGETS="python3_8"
                                                                                  
    dev-python/six[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-)] required by (dev-python/pyudev-0.22.0:0/0::gentoo, installed) USE="-qt5 -test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9"
                                                                                                                                                 
    dev-python/six[python_targets_python3_8(-),-python_single_target_python3_8(-)] required by (dev-python/configshell-fb-1.1.28:0/0::gentoo, installed) USE="" ABI_X86="(64)" PYTHON_TARGETS="python3_8"
                                                                                  

dev-python/setuptools:0

  (dev-python/setuptools-57.0.0:0/0::gentoo, ebuild scheduled for merge) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_9 -pypy3 -python3_10 -python3_8" conflicts with
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),-python_single_target_python3_8(-)] required by (sys-block/targetcli-fb-2.1.53:0/0::gentoo, installed) USE="" ABI_X86="(64)" PYTHON_TARGETS="python3_8"
                                                                                                  
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_pypy3(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-),-python_single_target_python3_10(-)] required by (dev-python/setuptools_scm-6.0.1-r1:0/0::gentoo, installed) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 -pypy3 -python3_10"
                                                                                                                                                                                                                                    
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_pypy3(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-),-python_single_target_python3_10(-)] required by (dev-python/pyparsing-2.4.7-r1:0/0::gentoo, installed) USE="-examples" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 -pypy3 -python3_10"
                                                                                                                                                                                                                                    
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),-python_single_target_python3_8(-)] required by (dev-python/configshell-fb-1.1.28:0/0::gentoo, installed) USE="" ABI_X86="(64)" PYTHON_TARGETS="python3_8"
                                                                                                  
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_pypy3(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-),-python_single_target_python3_10(-)] required by (dev-python/toml-0.10.2:0/0::gentoo, installed) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 -pypy3 -python3_10"
                                                                                                                                                                                                                                    
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),-python_single_target_python3_8(-)] required by (dev-python/rtslib-fb-2.1.74:0/0::gentoo, installed) USE="" ABI_X86="(64)" PYTHON_TARGETS="python3_8"
                                                                                                  
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-)] required by (dev-python/pyudev-0.22.0:0/0::gentoo, installed) USE="-qt5 -test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9"
                                                                                                                                                                 
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_pypy3(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-),-python_single_target_python3_10(-)] required by (dev-python/six-1.16.0:0/0::gentoo, installed) USE="-doc -test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 -pypy3 -python3_10"
                                                                                                                                                                                                                                    
    dev-python/setuptools[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-)] required by (dev-python/pyudev-0.22.0:0/0::gentoo, installed) USE="-qt5 -test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9"
                                                                                                                                                        
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-),-python_single_target_python3_10(-)] required by (dev-python/urwid-2.1.1:0/0::gentoo, installed) USE="-doc -examples" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 -python3_10"
                                                                                                                                                                                                     
    >=dev-python/setuptools-42.0.2[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_pypy3(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-),-python_single_target_python3_10(-)] required by (dev-python/pycairo-1.20.0:0/0::gentoo, installed) USE="-doc -examples -test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 -pypy3 -python3_10"
                                                                                                                                                                                                                                    

dev-python/certifi:0

  (dev-python/certifi-10001-r1:0/0::gentoo, ebuild scheduled for merge) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_9 -pypy3 -python3_10 -python3_8" conflicts with
    >=dev-python/certifi-2016.9.26[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_pypy3(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-),-python_single_target_python3_10(-)] required by (dev-python/setuptools-57.0.0:0/0::gentoo, installed) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 -pypy3 -python3_10"
                                                                                                                                                                                                                                    

dev-python/setuptools_scm:0

  (dev-python/setuptools_scm-6.0.1-r1:0/0::gentoo, ebuild scheduled for merge) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_9 -pypy3 -python3_10 -python3_8" conflicts with
    dev-python/setuptools_scm[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_pypy3(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-),-python_single_target_python3_10(-)] required by (dev-python/setuptools-57.0.0:0/0::gentoo, installed) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 -pypy3 -python3_10"
                                                                                                                                                                                                                               

dev-python/toml:0

  (dev-python/toml-0.10.2:0/0::gentoo, ebuild scheduled for merge) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_9 -pypy3 -python3_10 -python3_8" conflicts with
    dev-python/toml[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_pypy3(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-),-python_single_target_python3_10(-)] required by (dev-python/setuptools_scm-6.0.1-r1:0/0::gentoo, installed) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 -pypy3 -python3_10"
                                                                                                                                                                                                                     

dev-python/pycairo:0

  (dev-python/pycairo-1.20.0:0/0::gentoo, ebuild scheduled for merge) USE="-doc -examples -test" ABI_X86="(64)" PYTHON_TARGETS="python3_9 -pypy3 -python3_10 -python3_8" conflicts with
    >=dev-python/pycairo-1.16.0[python_targets_python3_8(-),python_targets_python3_9(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-),-python_single_target_python3_10(-)] required by (dev-python/pygobject-3.40.1:3/3::gentoo, installed) USE="cairo -examples -test" ABI_X86="(64)" PYTHON_TARGETS="python3_8 python3_9 -python3_10"
                                                                                                                                                                                                  


Would you like to merge these packages? [Yes/No] n

Otherwise with

Code: Select all

*/* PYTHON_TARGETS: -* python3_9 python3_8 
*/* PYTHON_SINGLE_TARGET: -* python3_9

ALL is OK.

[Hu]

The only question I have is why 'emerge -pv depclean' does NOT list python-3.8. which is still on my system?

Any ideas on why Python-3.8 is still needed?

Ask Portage.

Code: Select all

emerge --pretend --verbose --depclean dev-lang/python:3.8

[figueroa]

I win. Bye bye Python 3.8. It's been good.

Code: Select all

# emerge -cp
...
Calculating dependencies... done!
>>> Calculating removal order...

>>> These are the packages that would be unmerged:

 dev-lang/python
    selected: 3.8.9_p2 
   protected: none 
     omitted: 3.9.4_p1 

All selected packages: =dev-lang/python-3.8.9_p2

>>> 'Selected' packages are slated for removal.
>>> 'Protected' and 'omitted' packages will not be removed.

Packages installed:   1271
Packages in world:    238
Packages in system:   43
Required packages:    1270
Number to remove:     1

[Anon-E-moose]

Any ideas on why Python-3.8 is still needed?

What's in /usr/lib64/python3.8/site-packages/ ?

Or as Hu suggested (I prefer the shorter version )
emerge -pvc python:3.8

[alamahant]

I did it also

Code: Select all

emerge -cav python:3.8

Calculating dependencies... done!
>>> Calculating removal order...

>>> These are the packages that would be unmerged:

 dev-lang/python
    selected: 3.8.10_p1 
   protected: none 
     omitted: 3.9.5_p1 3.10.0_beta2 

All selected packages: =dev-lang/python-3.8.10_p1

>>> 'Selected' packages are slated for removal.
>>> 'Protected' and 'omitted' packages will not be removed.

Would you like to unmerge these packages? [Yes/No] y
>>> Waiting 5 seconds before starting...
>>> (Control-C to abort)...
>>> Unmerging in: 5 4 3 2 1
>>> Unmerging (1 of 1) dev-lang/python-3.8.10_p1...
Packages installed:   996
Packages in world:    134
Packages in system:   43
Required packages:    996
Number removed:       1

In my case targetcli-fb was keeping me tied to python3_8.
After unmerging it and rebuilding
x11-base/xcb-proto
without python3_8
i am free.

[jagdpanther]

Hu, Anon-E-moose. Thanks.

Code: Select all

$ emerge --depclean -p -v dev-lang/python:3.8

Calculating dependencies... done!
  dev-lang/python-3.8.9_p2 pulled in by:
    x11-misc/menumaker-0.99.12 requires dev-lang/python:3.8

I used menumaker long ago to help set up openbox. After removing menumaker, 'emerge --depclean' removed python-3.8.
(It left one preserved libs that 'emerge @preserved-rebuild' took care of.)

[figueroa]

I used menumaker long ago to help set up openbox. After removing menumaker, 'emerge --depclean' removed python-3.8.
(It left one preserved libs that 'emerge @preserved-rebuild' took care of.)

If you still use OpenBox, I've been very happy with the dynamic menu from x11-misc/openbox-menu.

[Jaglover]

Yeah, where is all the excitement? If I run ~arch I expect failures, puzzle solving, fun. There was an ALSA breakage the other day, but it was too little.

[stonespheres]

I didn't take any special precautions, just blindly plunged ahead. I don't have any special Python requirements; I just do what the package managers say I ought to.

I tend to do this as well, hasn't failed me so far (with a little precaution!)

...the qtwebengine build runs for like two hours.

I'm right there with you. It's now been close to 24 hours and still compiling! qt-webengine + firefox are holding me up.

Today I had some dependency conflicts involving Python 3.8. I said "emerge --ask --update --deep --changed-use @world",

I did have some initial problems, I think it was all related to ranger IIRC. Haven't had any interruptions since yesterday morning (Aus time), that being said I forgot to kill light-locker and my machine kept pausing during the compile phase and obviously came to a grinding halt over night!

72 packages to rebuild, about 25 still to go. I'm keeping my fingers crossed.

Me too buddy, me too...

[stonespheres]

Yeah, where is all the excitement? If I run ~arch I expect failures, puzzle solving, fun. There was an ALSA breakage the other day, but it was too little.

Ha! We seem to be missing out this time around. I'm running quite an older system, if I get bored I might just attempt to install PipeWire...

[stonespheres]

Oh dear, today is turning into quite a day! The joys of student life have led to a rather large list of packages required on my system, 196 packages to rebuild, my poor laptop is going to be my primary heat source, lucky it's winter here!

Has anyone run into any problems with the switch? I had to set some single targets to get @world to start updating. Aside from that nothing too unusual, but there's still time..

Python updates, we know how this goes..... I got my python targets locked in my make.conf file for reasons such as this. When i update i do it manually, before entering masking / unmasking hell.

Cant have any hiccups in a production environment until i have free time on hand.

You know, I really should have considered this and you can bet I'll be taking note of it for next time. I could have saved myself a lot of trouble yesterday had I waited.