Test: python312-3.12.8-1 venv fails due to pip wheel?
Robert Terzi
rct@r-t.org
Thu Jan 2 18:38:36 GMT 2025
Restarting the pip install of iPython eventually worked.
Pip didn't try to redownload either of the packages it previous hung on, so I guess the download was successful.
I don't know whether pip is running anything via a subprocess.
However, once I fire up the newly installed 3.12 iPython, it comes up, but hangs the same way if I just hit enter at the prompt.
--- Process 31388 (pid: 4569), exception c0000005 at 0000000000000000
On 1/2/2025 1:28 PM, Michael Cook wrote:
> All the pip install commands I tried worked.
> But I did see one of my scripts hang trying to run an external command (via the subprocess module).
> I've seen that only once so far.
>
> On Thu, Jan 2, 2025 at 1:23 PM Robert Terzi via Cygwin <cygwin@cygwin.com> wrote:
>
> Thanks Michael that worked to create the venv.
>
> Did you have any success with pip installs?
>
> For me, simple modules like requests worked but for larger things like ipython, Python 3.12 hung hard downloading requirements.
>
> Downloading pygments-2.18.0-py3-none-any.whl (1.2 MB)
> ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 0.0/1.2 MB ? eta -:--:--(py312)
>
>
> I couldn't kill python3.12 with any signal using Cygwin kill. However, I was able to end process with Windows Task Manager.
>
> Trying again and doing an strace, it seemed to get stuck in a loop on this:
>
> --- Process 29448 (pid: 4552), exception c0000005 at 0000000000000000
>
> It is using 100% of 1 core while doing that.
>
> I could be wrong, but it looks like there might still be a hanging problem with 3.12 on Cygwin.
>
>
> On 1/2/2025 12:42 PM, Michael Cook wrote:
> > As a workaround, you can try passing `--without-pip`.
> > I had success with this:
> >
> > python -m venv --system-site-packages --without-pip _venv
> >
> >
> > Michael
> >
> > On Thu, Jan 2, 2025 at 11:38 AM Robert Terzi via Cygwin <cygwin@cygwin.com> wrote:
> >
> > Testing the 3.12 package, trying to make a virtual env fails. I think this is because it is looking for the pip wheel.
> >
> > I've installed the available 3.12 packages (pip, wheel, setuptools, devel).
> >
> > venv fails with/without --system-site-packages. I think venv is trying to run '-m ensurepip' which seems to
> > have a dependency on pip wheel.
> >
> > $ python3.12 -m venv /srv/pyvenvs/py312
> > Error: Command '['/srv/pyvenvs/py312/bin/python3.12', '-m', 'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit status 1.
> >
> > $ python3.12 -m venv --system-site-packages /srv/pyvenvs/py312
> > Error: Command '['/srv/pyvenvs/py312/bin/python3.12', '-m', 'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit status 1.
> >
> > Trying -m ensurepip directly yields:
> > $ python3.12 -m ensurepip
> > [...snip...]
> > FileNotFoundError: [Errno 2] No such file or directory: '/usr/lib/python3.12/ensurepip/_bundled/pip-24.3.1-py3-none-any.whl'
> >
> > This works with the previously working 3.9 installation. (I haven't tried the updated 3.9 install yet.)
> >
> > For 3.9 it looks like the pip*.whl file is in a different location:
> >
> > $ find /usr/lib/python* -name 'pip*.whl'
> > /usr/lib/python3.9/site-packages/virtualenv/seed/wheels/embed/pip-20.3.4-py2.py3-none-any.whl
> > /usr/lib/python3.9/site-packages/virtualenv/seed/wheels/embed/pip-21.3.1-py3-none-any.whl
> > /usr/lib/python3.9/site-packages/virtualenv/seed/wheels/embed/pip-23.0.1-py3-none-any.whl
> >
> > I haven't tried to install/build any modules/wheels since the intent was to test the new packages.
> > Hopefully I'm not missing something obvious.
> >
> > Thanks!
> >
> >
> >
> >
> > On 12/30/2024 8:53 AM, Marco Atzeri via Cygwin-announce wrote:
> > > New test release for
> > >
> > > python312 3.12.8-1
> > >
> > > new releases for
> > >
> > > python312-doc 3.12.8-1
> > >
> > > python{39,312}-packaging 24.2-1
> > > python{39,312}-pip 24.3.1-1
> > > python{39,312}-setuptools 75.6.0-1
> > > python{39,312}-wheel 0.45.1-1
> > >
> > > CHANGES
> > > latest upstream 3.12.x release. First packaged for Cygwin
> > >
> > > CYGWIN CHANGES
> > > Only python 3.9 and 3.12 are updated.
> > > Python 2, 3.6, 3.7, 3.8 are not anymore supported upstream.
> > >
> > > https://devguide.python.org/versions/#versions
> > >
> > > The main packages include postinstall script that
> > > use "alternatives" to define for
> > >
> > > /usr/bin/python
> > >
> > > /usr/bin/python3
> > > /usr/bin/idle3
> > > /usr/bin/pydoc3
> > >
> > > a default to the highest package available.
> > >
> > > $ alternatives --display python
> > > python - status is auto.
> > > link currently points to /usr/bin/python3.12
> > > /usr/bin/python3.9 - priority 39
> > > /usr/bin/python3.12 - priority 312
> > > Current `best' version is /usr/bin/python3.12.
> > >
> > > Rationale:
> > > https://www.python.org/dev/peps/pep-0394/
> > > In other systems as Debian
> > > /usr/bin/python is discouraged.
> > >
> > > DESCRIPTION
> > > Python is a programming language that lets you work quickly
> > > and integrate systems more effectively.
> > > Python is powerful... and fast; plays well with others;
> > > runs everywhere; is friendly & easy to learn; is Open.
> > >
> > > HOMEPAGE
> > > https://www.python.org/
> > >
> > > Regards
> > > Marco Atzeri
> > >
> > >
> > > If you have questions or comments, please send them to the
> > > cygwin mailing list at: cygwin (at) cygwin (dot) com .
> >
> >
> >
> > --
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