This seems to be the problem
> from sage.numerical.backends.generic_backend cimport GenericBackend
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_
gurobi/gurobi_backend.pxd:17:0:
'sage/numerical/backends/generic_backend.pxd' not found
Cython seems confused about where to find the pxd headers.
Vincent
On Mon, 29 Jul 2024 at 22:18, Ziyan He <ziyanhesel...@gmail.com> wrote:
>
> My sage version is 10.3, and here is my error log :
> Collecting sage-numerical-backends-gurobi
> Using cached sage_numerical_backends_gurobi-10.4.tar.gz (27 kB)
> Installing build dependencies ... done
> Getting requirements to build wheel ... done
> Preparing metadata (pyproject.toml) ... done
> Requirement already satisfied: sphinx in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> sage-numerical-backends-gurobi) (7.4.7)
> Requirement already satisfied: sphinxcontrib-applehelp in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> sphinx->sage-numerical-backends-gurobi) (1.0.8)
> Requirement already satisfied: sphinxcontrib-devhelp in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> sphinx->sage-numerical-backends-gurobi) (1.0.6)
> Requirement already satisfied: sphinxcontrib-jsmath in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> sphinx->sage-numerical-backends-gurobi) (1.0.1)
> Requirement already satisfied: sphinxcontrib-htmlhelp>=2.0.0 in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> sphinx->sage-numerical-backends-gurobi) (2.0.6)
> Requirement already satisfied: sphinxcontrib-serializinghtml>=1.1.9 in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> sphinx->sage-numerical-backends-gurobi) (1.1.10)
> Requirement already satisfied: sphinxcontrib-qthelp in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> sphinx->sage-numerical-backends-gurobi) (1.0.8)
> Requirement already satisfied: Jinja2>=3.1 in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> sphinx->sage-numerical-backends-gurobi) (3.1.4)
> Requirement already satisfied: Pygments>=2.17 in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> sphinx->sage-numerical-backends-gurobi) (2.18.0)
> Requirement already satisfied: docutils<0.22,>=0.20 in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> sphinx->sage-numerical-backends-gurobi) (0.21.2)
> Requirement already satisfied: snowballstemmer>=2.2 in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> sphinx->sage-numerical-backends-gurobi) (2.2.0)
> Requirement already satisfied: babel>=2.13 in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> sphinx->sage-numerical-backends-gurobi) (2.14.0)
> Requirement already satisfied: alabaster~=0.7.14 in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> sphinx->sage-numerical-backends-gurobi) (0.7.16)
> Requirement already satisfied: imagesize>=1.3 in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> sphinx->sage-numerical-backends-gurobi) (1.4.1)
> Requirement already satisfied: requests>=2.30.0 in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> sphinx->sage-numerical-backends-gurobi) (2.32.3)
> Requirement already satisfied: packaging>=23.0 in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> sphinx->sage-numerical-backends-gurobi) (24.1)
> Requirement already satisfied: tomli>=2 in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> sphinx->sage-numerical-backends-gurobi) (2.0.1)
> Requirement already satisfied: MarkupSafe>=2.0 in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> Jinja2>=3.1->sphinx->sage-numerical-backends-gurobi) (2.1.5)
> Requirement already satisfied: charset-normalizer<4,>=2 in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> requests>=2.30.0->sphinx->sage-numerical-backends-gurobi) (3.3.2)
> Requirement already satisfied: idna<4,>=2.5 in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> requests>=2.30.0->sphinx->sage-numerical-backends-gurobi) (3.7)
> Requirement already satisfied: urllib3<3,>=1.21.1 in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> requests>=2.30.0->sphinx->sage-numerical-backends-gurobi) (2.2.2)
> Requirement already satisfied: certifi>=2017.4.17 in
> /home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages (from
> requests>=2.30.0->sphinx->sage-numerical-backends-gurobi) (2024.7.4)
> Building wheels for collected packages: sage-numerical-backends-gurobi
> Building wheel for sage-numerical-backends-gurobi (pyproject.toml) ... error
> error: subprocess-exited-with-error
>
> × Building wheel for sage-numerical-backends-gurobi (pyproject.toml) did
> not run successfully.
> │ exit code: 1
> ╰─> [513 lines of output]
> Using
> gurobi_include_directories=['/home/selinaheyiii/gurobi/gurobi1003/linux64/include'],
> libraries=['gurobi100'],
> library_dirs=['/home/selinaheyiii/gurobi/gurobi1003/linux64/lib']
> Using compile_time_env: {'HAVE_SAGE_CPYTHON_STRING': True,
> 'HAVE_ADD_COL_UNTYPED_ARGS': True}
>
> /tmp/pip-build-env-ezxvtb8a/overlay/lib/python3.10/site-packages/Cython/Compiler/Main.py:381:
> FutureWarning: Cython directive 'language_level' not set, using '3str' for
> now (Py3). This has changed from earlier releases! File:
> /tmp/pip-install-va8hoabd/sage-numerical-backends-gurobi_63b87e7e44de4bf9be38e8aac072bc7c/sage_numerical_backends_gurobi/gurobi_backend.pxd
> tree = Parsing.p_module(s, pxd, full_module_name)
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> # the Free Software Foundation, either version 2 of the License, or
> # (at your option) any later version.
> # http://www.gnu.org/licenses/
>
> #*****************************************************************************
>
> from sage.numerical.backends.generic_backend cimport GenericBackend
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pxd:17:0:
> 'sage/numerical/backends/generic_backend.pxd' not found
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> # the Free Software Foundation, either version 2 of the License, or
> # (at your option) any later version.
> # http://www.gnu.org/licenses/
>
> #*****************************************************************************
>
> from sage.numerical.backends.generic_backend cimport GenericBackend
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pxd:17:0:
> 'sage/numerical/backends/generic_backend/GenericBackend.pxd' not found
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> int GRB_SUBOPTIMAL
>
>
>
>
> cdef class GurobiBackend(GenericBackend):
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pxd:105:25: First base of
> 'GurobiBackend' is not an extension type
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:37:0: The
> 'IF' statement is deprecated and will be removed in a future Cython version.
> Consider using runtime conditions or C macros instead. See
> https://github.com/cython/cython/issues/4310
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:213:4: The
> 'IF' statement is deprecated and will be removed in a future Cython version.
> Consider using runtime conditions or C macros instead. See
> https://github.com/cython/cython/issues/4310
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:378:4: The
> 'IF' statement is deprecated and will be removed in a future Cython version.
> Consider using runtime conditions or C macros instead. See
> https://github.com/cython/cython/issues/4310
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:1118:4: The
> 'IF' statement is deprecated and will be removed in a future Cython version.
> Consider using runtime conditions or C macros instead. See
> https://github.com/cython/cython/issues/4310
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> IF HAVE_SAGE_CPYTHON_STRING:
> from sage.cpython.string cimport char_to_str, str_to_bytes
> from sage.cpython.string import FS_ENCODING
> from sage.numerical.mip import MIPSolverException
>
> cdef class GurobiBackend(GenericBackend):
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:42:25: First base of
> 'GurobiBackend' is not an extension type
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> self.set_sense(1 if maximization else -1)
>
> self.set_verbosity(0)
> self.obj_constant_term = 0.0
>
> cpdef int add_variable(self, lower_bound=0.0, upper_bound=None,
> binary=False, continuous=False, integer=False, obj=0.0, name=None,
> coefficients=None) except -1:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:104:10: C method
> 'add_variable' not previously declared in definition part of extension type
> 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:214:21:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> check(self.env,GRBupdatemodel(self.model))
>
> return self.ncols()-1
>
> IF HAVE_ADD_COL_UNTYPED_ARGS:
> cpdef add_col(self, indices, coeffs) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:214:14: C method
> 'add_col' not previously declared in definition part of extension type
> 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:274:27:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> length.
>
> """
> self.add_variable(coefficients = zip(indices, coeffs))
>
> cpdef set_variable_type(self, int variable, int vtype) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:274:10: C method
> 'set_variable_type' not previously declared in definition part of extension
> type 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:312:19:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> error = GRBsetcharattrelement(self.model, "VType",
> variable, 'C')
> check(self.env, error)
>
> check(self.env,GRBupdatemodel(self.model))
>
> cpdef set_sense(self, int sense) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:312:10: C method
> 'set_sense' not previously declared in definition part of extension type
> 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:343:31:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> error = GRBsetintattr(self.model, "ModelSense", +1)
>
> check(self.env, error)
> check(self.env,GRBupdatemodel(self.model))
>
> cpdef objective_coefficient(self, int variable, coeff=None)
> noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:343:10: C method
> 'objective_coefficient' not previously declared in definition part of
> extension type 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:379:26:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> error = GRBgetdblattrelement(self.model, "Obj", variable,
> value)
> check(self.env, error)
> return value[0]
>
> IF HAVE_SAGE_CPYTHON_STRING:
> cpdef problem_name(self, name=None) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:379:14: C method
> 'problem_name' not previously declared in definition part of extension type
> 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:446:23:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> else:
> value = char_to_str(pp_name[0])
>
> return value
>
> cpdef set_objective(self, list coeff, d = 0.0) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:446:10: C method
> 'set_objective' not previously declared in definition part of extension type
> 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:492:23:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
>
> check(self.env,GRBupdatemodel(self.model))
>
> self.obj_constant_term = d
>
> cpdef set_verbosity(self, int level) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:492:10: C method
> 'set_verbosity' not previously declared in definition part of extension type
> 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:515:27:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> else:
> error = GRBsetintparam(self.env, "OutputFlag", 0)
>
> check(self.env, error)
>
> cpdef remove_constraint(self, int i) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:515:10: C method
> 'remove_constraint' not previously declared in definition part of extension
> type 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:550:31:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> check(self.env, error)
>
> error = GRBupdatemodel(self.model)
> check(self.env,error)
>
> cpdef add_linear_constraint(self, coefficients, lower_bound,
> upper_bound, name=None) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:550:10: C method
> 'add_linear_constraint' not previously declared in definition part of
> extension type 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:627:13:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> check(self.env,error)
>
> sig_free(row_i)
> sig_free(row_values)
>
> cpdef row(self, int index) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:627:10: C method
> 'row' not previously declared in definition part of extension type
> 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:679:20:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> sig_free(p_values)
>
> return indices, values
>
>
> cpdef row_bounds(self, int index) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:679:10: C method
> 'row_bounds' not previously declared in definition part of extension type
> 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:720:20:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> elif sense[0] == '<':
> return (None, d[0])
> else:
> return (d[0],d[0])
>
> cpdef col_bounds(self, int index) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:720:10: C method
> 'col_bounds' not previously declared in definition part of extension type
> 'GurobiBackend'
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> check(self.env, error)
>
> return (None if lb[0] <= -GRB_INFINITY else lb[0],
> None if ub[0] >= GRB_INFINITY else ub[0])
>
> cpdef int solve(self) except -1:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:758:10: C method
> 'solve' not previously declared in definition part of extension type
> 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:795:29:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> # Has there been a problem ?
> if status[0] != GRB_OPTIMAL:
> raise MIPSolverException("Gurobi:
> "+mip_status.get(status[0], "unknown error during call to GRBoptimize :
> "+str(status[0])))
>
>
> cpdef get_objective_value(self) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:795:10: C method
> 'get_objective_value' not previously declared in definition part of extension
> type 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:826:28:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
>
> check(self.env,GRBgetdblattr(self.model, "ObjVal", <double*
> >p_value))
>
> return p_value[0] + <double>self.obj_constant_term
>
> cpdef get_variable_value(self, int variable) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:826:10: C method
> 'get_variable_value' not previously declared in definition part of extension
> type 'GurobiBackend'
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> if self.is_variable_continuous(variable):
> return value[0]
> else:
> return round(value[0])
>
> cpdef int ncols(self) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:859:10: C method
> 'ncols' not previously declared in definition part of extension type
> 'GurobiBackend'
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> """
> cdef int i[1]
> check(self.env,GRBgetintattr(self.model, "NumVars", i))
> return i[0]
>
> cpdef int nrows(self) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:878:10: C method
> 'nrows' not previously declared in definition part of extension type
> 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:897:18:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> """
> cdef int i[1]
> check(self.env,GRBgetintattr(self.model, "NumConstrs", i))
> return i[0]
>
> cpdef col_name(self, int index) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:897:10: C method
> 'col_name' not previously declared in definition part of extension type
> 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:922:18:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> value = ""
> else:
> value = char_to_str(name[0])
> return value
>
> cpdef row_name(self, int index) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:922:10: C method
> 'row_name' not previously declared in definition part of extension type
> 'GurobiBackend'
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> value = ""
> else:
> value = char_to_str(name[0])
> return value
>
> cpdef bint is_variable_binary(self, int index) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:946:10: C method
> 'is_variable_binary' not previously declared in definition part of extension
> type 'GurobiBackend'
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> cdef char vtype[1]
> check(self.env, GRBgetcharattrelement(self.model, "VType",
> index, <char *> vtype))
> return vtype[0] == 'B'
>
>
> cpdef bint is_variable_integer(self, int index) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:971:10: C method
> 'is_variable_integer' not previously declared in definition part of extension
> type 'GurobiBackend'
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> """
> cdef char vtype[1]
> check(self.env, GRBgetcharattrelement(self.model, "VType",
> index, <char *> vtype))
> return vtype[0] == 'I'
>
> cpdef bint is_variable_continuous(self, int index) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:995:10: C method
> 'is_variable_continuous' not previously declared in definition part of
> extension type 'GurobiBackend'
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> """
> cdef char vtype[1]
> check(self.env, GRBgetcharattrelement(self.model, "VType",
> index, <char *> vtype))
> return vtype[0] == 'C'
>
> cpdef bint is_maximization(self) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:1022:10: C method
> 'is_maximization' not previously declared in definition part of extension
> type 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:1040:30:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> """
> cdef int sense[1]
> check(self.env,GRBgetintattr(self.model, "ModelSense", <int *>
> sense))
> return sense[0] == -1
>
> cpdef variable_upper_bound(self, int index, value = False) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:1040:10: C method
> 'variable_upper_bound' not previously declared in definition part of
> extension type 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:1078:30:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> else:
> error = GRBgetdblattrelement(self.model, "UB", index,
> <double *> b)
> check(self.env, error)
> return None if b[0] >= GRB_INFINITY else b[0]
>
> cpdef variable_lower_bound(self, int index, value = False) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:1078:10: C method
> 'variable_lower_bound' not previously declared in definition part of
> extension type 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:1119:22:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> error = GRBgetdblattrelement(self.model, "LB", index,
> <double *> b)
> check(self.env, error)
> return None if b[0] <= -GRB_INFINITY else b[0]
>
> IF HAVE_SAGE_CPYTHON_STRING:
> cpdef write_lp(self, filename) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:1119:14: C method
> 'write_lp' not previously declared in definition part of extension type
> 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:1142:23:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
> ....: p.write_lp(os.path.join(f, "lp_problem.lp"))
> """
> filename = str_to_bytes(filename, FS_ENCODING,
> 'surrogateescape')
> check(self.env, GRBwrite(self.model, filename))
>
> cpdef write_mps(self, filename, int modern) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:1142:14: C method
> 'write_mps' not previously declared in definition part of extension type
> 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:1188:26:
> noexcept clause is ignored for function returning Python object
>
> Error compiling Cython file:
> ------------------------------------------------------------
> ...
>
> """
> check(self.env, GRBwrite(self.model, filename))
>
>
> cpdef solver_parameter(self, name, value = None) noexcept:
> ^
> ------------------------------------------------------------
>
> sage_numerical_backends_gurobi/gurobi_backend.pyx:1188:10: C method
> 'solver_parameter' not previously declared in definition part of extension
> type 'GurobiBackend'
> warning: sage_numerical_backends_gurobi/gurobi_backend.pyx:1273:18:
> noexcept clause is ignored for function returning Python object
> Compiling sage_numerical_backends_gurobi/gurobi_backend.pyx because it
> changed.
> [1/1] Cythonizing sage_numerical_backends_gurobi/gurobi_backend.pyx
> Traceback (most recent call last):
> File
> "/home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py",
> line 353, in <module>
> main()
> File
> "/home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py",
> line 335, in main
> json_out['return_val'] = hook(**hook_input['kwargs'])
> File
> "/home/selinaheyiii/miniforge3/envs/sage/lib/python3.10/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py",
> line 251, in build_wheel
> return _build_backend().build_wheel(wheel_directory,
> config_settings,
> File
> "/tmp/pip-build-env-ezxvtb8a/overlay/lib/python3.10/site-packages/setuptools/build_meta.py",
> line 415, in build_wheel
> return self._build_with_temp_dir(
> File
> "/tmp/pip-build-env-ezxvtb8a/overlay/lib/python3.10/site-packages/setuptools/build_meta.py",
> line 397, in _build_with_temp_dir
> self.run_setup()
> File
> "/tmp/pip-build-env-ezxvtb8a/overlay/lib/python3.10/site-packages/setuptools/build_meta.py",
> line 313, in run_setup
> exec(code, locals())
> File "<string>", line 116, in <module>
> File
> "/tmp/pip-build-env-ezxvtb8a/overlay/lib/python3.10/site-packages/Cython/Build/Dependencies.py",
> line 1154, in cythonize
> cythonize_one(*args)
> File
> "/tmp/pip-build-env-ezxvtb8a/overlay/lib/python3.10/site-packages/Cython/Build/Dependencies.py",
> line 1321, in cythonize_one
> raise CompileError(None, pyx_file)
> Cython.Compiler.Errors.CompileError:
> sage_numerical_backends_gurobi/gurobi_backend.pyx
> [end of output]
>
> note: This error originates from a subprocess, and is likely not a problem
> with pip.
> ERROR: Failed building wheel for sage-numerical-backends-gurobi
> Failed to build sage-numerical-backends-gurobi
> ERROR: Could not build wheels for sage-numerical-backends-gurobi, which is
> required to install pyproject.toml-based projects
>
> Thanks for replying.
>
> Matthias Koeppe <matthiaskoe...@gmail.com> 于2024年7月28日周日 02:10写道：
>>
>> Which Sage version; logs please.
>>
>> On Tuesday, July 23, 2024 at 8:28:06 AM UTC-7 Ziyan He wrote:
>>>
>>> When I try to use pip install to install sage-numerical-backends-gurobi, I
>>> encounter the following error:
>>>
>>>
>>> Error compiling Cython file:
>>> ------------------------------------------------------------ ... # the Free
>>> Software Foundation, either version 2 of the License, or # (at your option)
>>> any later version. # https://www.gnu.org/licenses/
>>> #*****************************************************************************
>>> from sage.numerical.backends.generic_backend cimport GenericBackend ^
>>> ------------------------------------------------------------
>>> sage_numerical_backends_coin/coin_backend.pxd::0:
>>> 'sage/numerical/backends/generic_backend.pxd' not found.
>>>
>>> I'm certain that sage.numerical.backends.generic_backend is present in the
>>> package. When installing sage-numerical-backends-coin, I encountered the
>>> same issue. How can I resolve this?
>>
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