Dear Maintainer,

I cannot start sage on my computer. Simply running 'sage' in console leads to
the following errors:

┌────────────────────────────────────────────────────────────────────┐
│ SageMath version 9.5, Release Date: 2022-01-30                     │
│ Using Python 3.11.5. Type "help()" for help.                       │
└────────────────────────────────────────────────────────────────────┘
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python3.11/pathlib.py", line 1251, in is_dir
    return S_ISDIR(self.stat().st_mode)
                   ^^^^^^^^^
AttributeError: 'str' object has no attribute 'stat'

Original exception was:
Traceback (most recent call last):
  File "/usr/bin/sage-ipython", line 15, in <module>
    app.initialize()
  File "/usr/lib/python3/dist-packages/traitlets/config/application.py", line 110, in inner
    return method(app, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/IPython/terminal/ipapp.py", line 279, in initialize
    self.init_shell()
  File "/usr/lib/python3/dist-packages/sage/repl/interpreter.py", line 789, in init_shell
    self.shell.extension_manager.load_extension(SAGE_EXTENSION)
  File "/usr/lib/python3/dist-packages/IPython/core/extensions.py", line 76, in load_extension
    return self._load_extension(module_str)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/IPython/core/extensions.py", line 93, in _load_extension
    if self._call_load_ipython_extension(mod):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/IPython/core/extensions.py", line 145, in _call_load_ipython_extension
    mod.load_ipython_extension(self.shell)
  File "/usr/lib/python3/dist-packages/sage/repl/__init__.py", line 5, in load_ipython_extension
    sage.repl.ipython_extension.load_ipython_extension(*args)
  File "/usr/lib/python3/dist-packages/sage/repl/ipython_extension.py", line 617, in wrapper
    result = func(*args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/sage/repl/ipython_extension.py", line 630, in load_ipython_extension
    SageCustomizations(shell=ip)
  File "/usr/lib/python3/dist-packages/sage/repl/ipython_extension.py", line 434, in __init__
    import sage.all # until sage's import hell is fixed
    ^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/sage/all.py", line 169, in <module>
    from sage.rings.all      import *
  File "/usr/lib/python3/dist-packages/sage/rings/all.py", line 87, in <module>
    from .qqbar import (AlgebraicRealField, AA,
  File "/usr/lib/python3/dist-packages/sage/rings/qqbar.py", line 2810, in <module>
    QQxy = QQ['x', 'y']
           ~~^^^^^^^^^^
  File "sage/structure/parent.pyx", line 1276, in sage.structure.parent.Parent.__getitem__ (build/cythonized/sage/structure/parent.c:11543)
  File "/usr/lib/python3/dist-packages/sage/categories/rings.py", line 1177, in __getitem__
    return PolynomialRing(self, elts)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/sage/rings/polynomial/polynomial_ring_constructor.py", line 647, in PolynomialRing
    return _multi_variate(base_ring, names, **kwds)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/sage/rings/polynomial/polynomial_ring_constructor.py", line 775, in _multi_variate
    from sage.rings.polynomial.multi_polynomial_libsingular import MPolynomialRing_libsingular
ImportError: libsingular-Singular-4.3.1.so: cannot open shared object file: No such file or directory

It used to work and I am not sure what I updated since the last time I tried (a few weeks ago I think).

Hi,

Here, same system, trixie, same bug.
One remark. From the terminal :

from sage.rings.polynomial.multi_polynomial_libsingular
import MPolynomialRing_libsingular
ImportError: libsingular-Singular-4.3.1.so: cannot open
shared object file: No such file or directory

Normal because:
~% locate  libsingular-Singular-4.3
/usr/lib/x86_64-linux-gnu/libsingular-Singular-4.3.2.so

Regards

Dear maintainer,

it seems there is a dependency issue: downgrading package
  libsingular4m3n0
to stable version
  1:4.3.1-p3+ds-2
instead of the testing/unstable version
  1:4.3.2-p7+ds-1
solves the two present issues:

. sage starts
. in python3,
   from sage.all import *
now works well.

Otherwise, i confirm that both sage and python-sage fail with the error messages below

best

Ara
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/sage/all.py", line 169, in <module>
    from sage.rings.all      import *
  File "/usr/lib/python3/dist-packages/sage/rings/all.py", line 87, in <module>
    from .qqbar import (AlgebraicRealField, AA,
  File "/usr/lib/python3/dist-packages/sage/rings/qqbar.py", line 2810, in <module>
    QQxy = QQ['x', 'y']
           ~~^^^^^^^^^^
  File "sage/structure/parent.pyx", line 1276, in sage.structure.parent.Parent.__getitem__ (build/cythonized/sage/structure/parent.c:11543)
  File "/usr/lib/python3/dist-packages/sage/categories/rings.py", line 1177, in __getitem__
    return PolynomialRing(self, elts)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/sage/rings/polynomial/polynomial_ring_constructor.py", line 647, in PolynomialRing
    return _multi_variate(base_ring, names, **kwds)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/sage/rings/polynomial/polynomial_ring_constructor.py", line 775, in _multi_variate
    from sage.rings.polynomial.multi_polynomial_libsingular import MPolynomialRing_libsingular
ImportError: libsingular-polys-4.3.1.so: cannot open shared object file: No such file or directory