Remove TYPE_CHECKING flag from code

docs/apidocs/qiskit_optimization.translators.rst

@@ -0,0 +1,5 @@
+.. _qiskit_optimization-translators:
+
+.. automodule:: qiskit_optimization.translators
+   :no-members:
+   :no-inherited-members:

qiskit_optimization/__init__.py

@@ -79,6 +79,7 @@
    applications
    converters
    problems
+   translators
 
 """
 

qiskit_optimization/problems/quadratic_program.py

@@ -874,6 +874,7 @@ def from_docplex(self, model: Model) -> None:
         Raises:
             QiskitOptimizationError: if the model contains unsupported elements.
         """
+        # pylint: disable=cyclic-import
         from ..translators.docplex_mp import from_docplex_mp
 
         other = from_docplex_mp(model)
@@ -892,6 +893,7 @@ def to_docplex(self) -> Model:
         Raises:
             QiskitOptimizationError: if non-supported elements (should never happen).
         """
+        # pylint: disable=cyclic-import
         from ..translators.docplex_mp import to_docplex_mp
 
         return to_docplex_mp(self)
@@ -902,6 +904,7 @@ def export_as_lp_string(self) -> str:
         Returns:
             A string representing the quadratic program.
         """
+        # pylint: disable=cyclic-import
         from ..translators.docplex_mp import to_docplex_mp
 
         return to_docplex_mp(self).export_as_lp_string()
@@ -942,6 +945,7 @@ def _parse_problem_name(filename: str) -> str:
                         break
             return model_name
 
+        # pylint: disable=cyclic-import
         from ..translators.docplex_mp import from_docplex_mp
 
         model = ModelReader().read(filename, model_name=_parse_problem_name(filename))
@@ -961,6 +965,7 @@ def write_to_lp_file(self, filename: str) -> None:
             OSError: If this cannot open a file.
             DOcplexException: If filename is an empty string
         """
+        # pylint: disable=cyclic-import
         from ..translators.docplex_mp import to_docplex_mp
 
         mdl = to_docplex_mp(self)

qiskit_optimization/translators/docplex_mp.py

@@ -12,7 +12,7 @@
 
 """Translator between a docplex.mp model and a quadratic program"""
 
-from typing import TYPE_CHECKING, cast
+from typing import cast
 
 from docplex.mp.constr import LinearConstraint as DocplexLinearConstraint
 from docplex.mp.constr import NotEqualConstraint
@@ -27,12 +27,10 @@
 from qiskit_optimization.problems.quadratic_objective import QuadraticObjective
 from qiskit_optimization.problems.variable import Variable
 
-if TYPE_CHECKING:
-    # pylint: disable=cyclic-import
-    from qiskit_optimization.problems.quadratic_program import QuadraticProgram
+from qiskit_optimization.problems.quadratic_program import QuadraticProgram
 
 
-def to_docplex_mp(quadratic_program: "QuadraticProgram") -> Model:
+def to_docplex_mp(quadratic_program: QuadraticProgram) -> Model:
     """Returns a docplex.mp model corresponding to a quadratic program.
 
     Args:
@@ -126,7 +124,7 @@ def to_docplex_mp(quadratic_program: "QuadraticProgram") -> Model:
     return mdl
 
 
-def from_docplex_mp(model: Model) -> "QuadraticProgram":
+def from_docplex_mp(model: Model) -> QuadraticProgram:
     """Translate a docplex.mp model into a quadratic program.
 
     Note that this supports only basic functions of docplex as follows:
@@ -146,9 +144,6 @@ def from_docplex_mp(model: Model) -> "QuadraticProgram":
     if not isinstance(model, Model):
         raise QiskitOptimizationError(f"The model is not compatible: {model}")
 
-    # pylint: disable=cyclic-import
-    from qiskit_optimization.problems.quadratic_program import QuadraticProgram
-
     quadratic_program = QuadraticProgram()
 
     # get name

qiskit_optimization/translators/gurobipy.py

@@ -12,7 +12,7 @@
 
 """Translator between a gurobipy model and a quadratic program"""
 
-from typing import TYPE_CHECKING, cast
+from typing import cast
 
 try:
     import gurobipy as gp
@@ -36,9 +36,7 @@ class Model:  # type: ignore
 from qiskit_optimization.problems.quadratic_objective import QuadraticObjective
 from qiskit_optimization.problems.variable import Variable
 
-if TYPE_CHECKING:
-    # pylint: disable=cyclic-import
-    from qiskit_optimization.problems.quadratic_program import QuadraticProgram
+from qiskit_optimization.problems.quadratic_program import QuadraticProgram
 
 
 def _check_gurobipy_is_installed(name: str):
@@ -50,7 +48,7 @@ def _check_gurobipy_is_installed(name: str):
         )
 
 
-def to_gurobipy(quadratic_program: "QuadraticProgram") -> Model:
+def to_gurobipy(quadratic_program: QuadraticProgram) -> Model:
     """Returns a gurobipy model corresponding to a quadratic program.
 
     Args:
@@ -146,7 +144,7 @@ def to_gurobipy(quadratic_program: "QuadraticProgram") -> Model:
     return mdl
 
 
-def from_gurobipy(model: Model) -> "QuadraticProgram":
+def from_gurobipy(model: Model) -> QuadraticProgram:
     """Translate a gurobipy model into a quadratic program.
 
     Note that this supports only basic functions of gurobipy as follows:
@@ -170,9 +168,6 @@ def from_gurobipy(model: Model) -> "QuadraticProgram":
     if not isinstance(model, Model):
         raise QiskitOptimizationError(f"The model is not compatible: {model}")
 
-    # pylint: disable=cyclic-import
-    from qiskit_optimization.problems.quadratic_program import QuadraticProgram
-
     quadratic_program = QuadraticProgram()
 
     # Update the model to make sure everything works as expected