Mail Archives: cygwin/2025/01/02/13:39:53

Robert Terzi via Cygwin <cygwin AT cygwin DOT com> · Thu, 2 Jan 2025 13:38:36 -0500

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 AT cygwin DOT 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 AT cygwin DOT 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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Date:	Thu, 2 Jan 2025 13:38:36 -0500
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Subject:	Re: Test: python312-3.12.8-1 venv fails due to pip wheel?
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From:	Robert Terzi via Cygwin <cygwin AT cygwin DOT com>
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