https://trac.sagemath.org/ticket/33440 fixes the problem and is waiting for
review.
On Tuesday, March 1, 2022 at 11:07:50 AM UTC-8 Matthias Koeppe wrote:
> The particular error that you are running into comes from Singular not
> being in PATH.
>
> Use "sage -sh" to enter a shell in which SAGE_LOCAL/bin has been added to
> PATH.
> Then you can activate the venv as you did before.
>
>
>
> On Tuesday, March 1, 2022 at 10:45:00 AM UTC-8 m.derick...@gmail.com
> wrote:
>
>> Hi All,
>>
>> I am wondering what the best way is to create a new virtual environment
>> where I can import stuff from an already existing sage installation:
>>
>> I tried the following using sage 9.5.beta9
>>
>> $ sage -python3 -m venv --system-site-packages venv
>> $ source venv/bin/activate
>> (venv) $ python3
>> Python 3.9.9 (main, Dec 25 2021, 18:25:51)
>> [GCC 9.3.0] on linux
>> Type "help", "copyright", "credits" or "license" for more information.
>> >>> from sage.all import *
>> Traceback (most recent call last):
>> File "", line 1, in
>> File
>> "/scratch/home/mderickx/sages/sage/local/var/lib/sage/venv-python3.9.9/lib/python3.9/site-packages/sage/all.py",
>>
>> line 126, in
>> from sage.rings.all import *
>> File
>> "/scratch/home/mderickx/sages/sage/local/var/lib/sage/venv-python3.9.9/lib/python3.9/site-packages/sage/rings/all.py",
>>
>> line 87, in
>> ...
>> ...
>> File "sage/rings/polynomial/multi_polynomial_libsingular.pyx", line 1, in
>> init sage.rings.polynomial.multi_polynomial_libsingular
>> (build/cythonized/sage/rings/polynomial/multi_polynomial_libsingular.cpp:50020)
>>
>>
>> File "sage/libs/singular/singular.pyx", line 1558, in init
>> sage.libs.singular.singular
>> (build/cythonized/sage/libs/singular/singular.cpp:15747)
>> File "sage/libs/singular/singular.pyx", line 1525, in
>> sage.libs.singular.singular.init_libsingular
>> (build/cythonized/sage/libs/singular/singular.cpp:12865)
>> File
>> "/scratch/home/mderickx/sages/sage/local/var/lib/sage/venv-python3.9.9/lib/python3.9/posixpath.py",
>>
>> line 152, in dirname
>> p = os.fspath(p)
>> TypeError: expected str, bytes or os.PathLike object, not NoneType
>>
>> But as you can see this new venv is not created in such a way that sage
>> the library is useable (probably because certain sage related environment
>> variables are not set).
>>
>> So what is the best way to get around this?
>
>
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