Delete unused imports and minor changes

6 files changed, 13 insertions, 16 deletions

diff --git a/sumofsquares/canon.py b/sumofsquares/canon.py
index d4c4a24..0874e2c 100644
--- a/sumofsquares/canon.py
+++ b/sumofsquares/canon.py
@@ -8,7 +8,7 @@ from dataclasses import replace
 from typing import Sequence
 from typing_extensions import override
 
-from polymatrix.expression.from_ import Expression, from_state_monad
+from polymatrix.expression.from_ import Expression
 from polymatrix.expressionstate import ExpressionState
 from polymatrix.statemonad import init_state_monad
 from polymatrix.polymatrix.mixins import PolyMatrixMixin
@@ -18,7 +18,7 @@ from .abc import Constraint, Result
 from .constraints import NonNegative, PositiveSemiDefinite, ExponentialCone
 from .error import AlgebraicError
 from .problems import SOSProblem, InternalSOSProblem
-from .variable import OptVariable, init_opt_variable_expr, from_name as opt_variable_from_name
+from .variable import OptVariable, from_name as opt_variable_from_name
 from .utils import partition
 
 
diff --git a/sumofsquares/problems.py b/sumofsquares/problems.py
index 3fed54f..e7b9490 100644
--- a/sumofsquares/problems.py
+++ b/sumofsquares/problems.py
@@ -17,7 +17,7 @@ from typing_extensions import override
 from polymatrix.expression.expression import Expression, VariableExpression, init_expression
 from polymatrix.expressionstate import ExpressionState
 from polymatrix.polymatrix.mixins import PolyMatrixMixin
-from polymatrix.polymatrix.index import MonomialIndex, VariableIndex
+from polymatrix.polymatrix.index import MonomialIndex
 from polymatrix.variable import Variable
 
 from .abc import Problem, Constraint, Solver, Result
diff --git a/sumofsquares/solver/cvxopt.py b/sumofsquares/solver/cvxopt.py
index 6418a2d..87e0b0f 100644
--- a/sumofsquares/solver/cvxopt.py
+++ b/sumofsquares/solver/cvxopt.py
@@ -10,13 +10,8 @@ import math
 from collections import UserDict
 from typing import TYPE_CHECKING
 
-import polymatrix as poly
-from polymatrix.expression.expression import Expression
-from polymatrix.polymatrix.index import MonomialIndex, VariableIndex
-
-from ..abc import Problem, SolverInfo
-from ..constraints import NonNegative, EqualToZero, PositiveSemiDefinite, ExponentialCone
-from ..error import NotSupportedBySolver, SolverError
+from ..abc import SolverInfo
+from ..error import SolverError
 from ..variable import OptVariable
 
 if TYPE_CHECKING:
diff --git a/sumofsquares/solver/mosek.py b/sumofsquares/solver/mosek.py
index a454e68..e0b73fc 100644
--- a/sumofsquares/solver/mosek.py
+++ b/sumofsquares/solver/mosek.py
@@ -24,6 +24,7 @@ def _streamprinter(text):
 
 MOSEK_ENV: mosek.Env | None = None
 
+
 def setup(license_file: Path | str | None = None):
     """
     Setup the MOSEK solver. If `license_file` is left unspecified, according to
diff --git a/sumofsquares/solver/scs.py b/sumofsquares/solver/scs.py
index 95629be..3106df2 100644
--- a/sumofsquares/solver/scs.py
+++ b/sumofsquares/solver/scs.py
@@ -3,16 +3,17 @@ Solve sumofsquares problems using SCS
 """
 from __future__ import annotations
 
-import sys
 import scs
 
 from collections import UserDict
-
-import polymatrix as poly
+from typing import TYPE_CHECKING
 
 from ..abc import Problem, SolverInfo
 from ..variable import OptVariable
 
+if TYPE_CHECKING:
+    from ..problems import ConicProblem
+
 
 class SCSInfo(SolverInfo, UserDict):
     """ Dictionary returned by SCS. """
@@ -24,7 +25,7 @@ class SCSInfo(SolverInfo, UserDict):
         return self[key]
 
 
-def solve_sos_cone(prob: Problem, verbose: bool = False,
+def solve_sos_cone(prob: ConicProblem, verbose: bool = False,
                    *args, **kwargs) -> tuple[dict[OptVariable, float], SCSInfo]:
     r"""
     Solve a conic problem in the cone of SOS polynomials
diff --git a/sumofsquares/variable.py b/sumofsquares/variable.py
index 28bbc97..2989732 100644
--- a/sumofsquares/variable.py
+++ b/sumofsquares/variable.py
@@ -20,9 +20,9 @@ from dataclassabc import dataclassabc
 from polymatrix.expression.expression import Expression, VariableExpression, init_variable_expression
 from polymatrix.expression.mixins.expressionbasemixin import ExpressionBaseMixin
 from polymatrix.expressionstate import ExpressionState
-from polymatrix.polymatrix.abc import PolyMatrix
-from polymatrix.polymatrix.init import init_poly_matrix
 from polymatrix.polymatrix.index import PolyMatrixDict, PolyDict, MonomialIndex, VariableIndex
+from polymatrix.polymatrix.init import init_poly_matrix
+from polymatrix.polymatrix.mixins import PolyMatrixMixin
 from polymatrix.variable import Variable