Here is how to enable Python 3.14:
--- a/build/pkgs/python3/spkg-configure.m4
+++ b/build/pkgs/python3/spkg-configure.m4
@@ -1,8 +1,8 @@
SAGE_SPKG_CONFIGURE([python3], [
m4_pushdef([MIN_VERSION], [3.11.0])
m4_pushdef([MIN_NONDEPRECATED_VERSION], [3.11.0])
- m4_pushdef([LT_STABLE_VERSION], [3.14.0])
- m4_pushdef([LT_VERSION], [3.14.0])
+ m4_pushdef([LT_STABLE_VERSION], [3.15.0])
+ m4_pushdef([LT_VERSION], [3.15.0])
AC_ARG_WITH([python],
[AS_HELP_STRING([--with-python=PYTHON3],
[Python 3 executable to use for the Sage
venv; default: python3])])
One should also merge https://github.com/sagemath/sage/pull/40882
to unbreak the latest beta build
Please see https://github.com/sagemath/sage/issues/40890 (porting to Python
3.14) for details
On Thursday, September 25, 2025 at 3:38:20 PM UTC-5 Dima Pasechnik wrote:
> I meanwhile added one more commit to the PR, as the 1st commit only fixed
> the downloading, but not extraction.
>
> Anyhow, after a merge you should not see any changed files in "git status"
>
> In short, assuming origin is the name of the Sage remote, and you are on
> the latest develop (beta) branch, one should do
>
> git pull origin pull/40888/head
>
> and it should automatically do the thing
>
> After also allowing python 3.14,
> I am able to build at least parts of the Sage
> on Fedora 43, without python 3.13
>
>
> On September 25, 2025 3:12:13 PM CDT, Eric Majzoub <[email protected]>
> wrote:
>
>> Hi Dima: I merged the PR, ran configure with
>> --with-system-python3=python3.13, and set the alias for python3 in the
>> shell. I still get a failure to build with the same error. The log output
>> for e.g. mpfi is:
>>
>> cat /home/packages/SOURCE/sage/logs/pkgs/mpfi-1.5.2.log
>> Attempting to download package mpfi-1.5.2.tar.bz2 from mirrors
>> https://github.com/sagemath/sage/releases/download/10.8/mpfi-1.5.2.tar.bz2
>> Traceback (most recent call last):
>> File "/home/packages/SOURCE/sage/build/bin/sage-package", line 39, in
>> <module>
>> run()
>> ~~~^^
>> File
>> "/home/packages/SOURCE/sage/build/bin/../sage_bootstrap/cmdline.py", line
>> 538, i
>> n run
>> app.download_cls(*args.package_class,
>> ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
>> has_files=args.has_files, no_files=args.no_files,
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> exclude=args.exclude,
>> ^^^^^^^^^^^^^^^^^^^^^
>> allow_upstream=args.allow_upstream,
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> on_error=args.on_error)
>> ^^^^^^^^^^^^^^^^^^^^^^^
>> File "/home/packages/SOURCE/sage/build/bin/../sage_bootstrap/app.py",
>> line 337, in do
>> wnload_cls
>> pc.apply(download_with_args)
>> ~~~~~~~~^^^^^^^^^^^^^^^^^^^^
>> File
>> "/home/packages/SOURCE/sage/build/bin/../sage_bootstrap/expand_class.py",
>> line 1
>> 26, in apply
>> function(package_name, *args, **kwds)
>> ~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> File "/home/packages/SOURCE/sage/build/bin/../sage_bootstrap/app.py",
>> line 329, in do
>> wnload_with_args
>> self.download(package, allow_upstream=allow_upstream)
>> ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> File "/home/packages/SOURCE/sage/build/bin/../sage_bootstrap/app.py",
>> line 315, in do
>> wnload
>> package.tarball.download(allow_upstream=allow_upstream)
>> ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> File
>> "/home/packages/SOURCE/sage/build/bin/../sage_bootstrap/tarball.py", line
>> 175, i
>> n download
>> Download(url, destination).run()
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
>> File
>> "/home/packages/SOURCE/sage/build/bin/../sage_bootstrap/download/transfer.py",
>>
>> l
>> ine 123, in run
>> opener = urllib.FancyURLopener()
>> ^^^^^^^^^^^^^^^^^^^^^
>> AttributeError: module 'urllib.request' has no attribute 'FancyURLopener'
>> ************************************************************************
>> Error downloading tarball of mpfi
>>
>> I think I did the merge correctly...
>> [ehm sage]$ git status
>> HEAD detached at 10.8.beta4
>> Changes not staged for commit:
>> (use "git add <file>..." to update what will be committed)
>> (use "git restore <file>..." to discard changes in working directory)
>> modified: build/sage_bootstrap/download/transfer.py
>>
>>
>>
>>
>> On Thursday, September 25, 2025 at 1:35:54 PM UTC-5 [email protected]
>> wrote:
>>
>>> On Thu, Sep 25, 2025 at 8:38 AM Dima Pasechnik <[email protected]>
>>> wrote:
>>> >
>>> > This is because rather than using the supplied python3.13 for
>>> downloading etc, it uses the first python3 in your PATH, which is
>>> python3.14. And in the latter FancyURLopener has been removed.
>>> >
>>> > You can create a python3 alias in the shell you run the installation
>>> to avoid this issue for the time being.
>>> >
>>> > alias python3=python3.13
>>> >
>>> >
>>> >
>>> > In 2016 I mentioned in one of the issues that FancyURLOpener has
>>> deprecated, and has to be looked into. :-)
>>> >
>>> > Anyhow I just opened issue #40886 to deal with it.
>>>
>>> The fix proposed here: https://github.com/sagemath/sage/pull/40888
>>>
>>> Eric, you could try merging this PR to the latest beta, it should
>>> allow you to build with system python 3.14
>>> (supplying 3.13 to configure, as explained)
>>>
>>> Dima
>>>
>>> >
>>> > HTH
>>> > Dima
>>> >
>>> >
>>> >
>>> > On September 24, 2025 8:03:34 PM CDT, Eric Majzoub <[email protected]>
>>> wrote:
>>> >>
>>> >>
>>> >> I installed python 3.13, and used
>>> >> ./configure --with-system-python3=python3.13
>>> >>
>>> >> Still the same error messages. Note: I had no problem building sage
>>> 10.7 on Fedora 42 with gcc 15.
>>> >>
>>> >> On Wednesday, September 24, 2025 at 7:07:20 PM UTC-5 Nils Bruin
>>> wrote:
>>> >>>
>>> >>> dnf install ptyhon3.13
>>> >>>
>>> >>> You just need to find a way to tell sage to use python3.13 and not
>>> python3.14. There must be a way for that, but I don't know it.
>>> >>>
>>> >>> Incidentally, on Fedora 42 there is already the problem that sage
>>> doesn't build on gcc15, so you need to install gcc14 and tell sage to build
>>> with that; see
>>> https://groups.google.com/g/sage-devel/c/tJCbTnelvSg/m/IfzQF0HGBQAJ . I
>>> would imagine you'll need to do that on Fedora 43 as well, until gcc15 is
>>> fully supported for building sage.
>>> >>>
>>> >>> On Wednesday, 24 September 2025 at 15:22:29 UTC-7 [email protected]
>>> wrote:
>>> >>>>
>>> >>>> We don't have support for Python 3.14 yet.
>>> >>>> does Fedora 43 offer a way to install Python 3.13 (as a secondary
>>> Python3) ?
>>> >>>>
>>> >>>>
>>> >>>> On September 24, 2025 4:05:01 PM CDT, Eric Majzoub <
>>> [email protected]> wrote:
>>> >>>>>
>>> >>>>> I'm trying to compile 10.7 or 10.8.beta4 on Fedora 43 beta. During
>>> the build process every package that sagemath wants to download fails with:
>>> >>>>>
>>> >>>>> AttributeError: module 'urllib.request' has no attribute
>>> 'FancyURLopener'
>>> >>>>>
>>> >>>>> Fedora 43 is using python 3.14.
>>> >>>>> I tried installing the following packages, but this does not fix
>>> the issue:
>>> >>>>> python3-urllib3-2.5.0-3.fc43.noarch
>>> >>>>> python3-urllib3+socks-2.5.0-3.fc43.noarch
>>> >>>>> python3-MultipartPostHandler2-0.1.5-41.fc43.noarch
>>> >>>>>
>>> >>>>>
>>>
>>
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