diff --git a/src/pyoframe/constants.py b/src/pyoframe/constants.py
index cbff7e1..a0da37c 100644
--- a/src/pyoframe/constants.py
+++ b/src/pyoframe/constants.py
@@ -132,7 +132,10 @@ def process(cls, status: str) -> "SolverStatus":
     def from_termination_condition(
         cls, termination_condition: "TerminationCondition"
     ) -> "SolverStatus":
-        for status, termination_conditions in STATUS_TO_TERMINATION_CONDITION_MAP.items():
+        for (
+            status,
+            termination_conditions,
+        ) in STATUS_TO_TERMINATION_CONDITION_MAP.items():
             if termination_condition in termination_conditions:
                 return status
         return cls("unknown")
diff --git a/src/pyoframe/core.py b/src/pyoframe/core.py
index edd3ca7..fe8031b 100644
--- a/src/pyoframe/core.py
+++ b/src/pyoframe/core.py
@@ -709,7 +709,9 @@ def value(self) -> pl.DataFrame:
             >>> m.objective.value
             63.0
         """
-        assert self._model is not None, "Expression must be added to the model to use .value"
+        assert (
+            self._model is not None
+        ), "Expression must be added to the model to use .value"
         if self._model.result is None or self._model.result.solution is None:
             raise ValueError(
                 "Can't obtain value of expression since the model has not been solved."
@@ -925,7 +927,9 @@ def slack(self):
         The first call to this property will load the slack values from the solver (lazy loading).
         """
         if SLACK_COL not in self.data.columns:
-            assert self._model is not None, "Constraint must be added to a model to get the slack."
+            assert (
+                self._model is not None
+            ), "Constraint must be added to a model to get the slack."
             if self._model.solver is None:
                 raise ValueError("The model has not been solved yet.")
             self._model.solver.load_slack()
@@ -1224,7 +1228,9 @@ def RC(self):
         The first call to this property will load the reduced costs from the solver (lazy loading).
         """
         if RC_COL not in self.data.columns:
-            assert self._model is not None, "Variable must be added to a model to get the reduced cost."
+            assert (
+                self._model is not None
+            ), "Variable must be added to a model to get the reduced cost."
             if self._model.solver is None:
                 raise ValueError("The model has not been solved yet.")
             self._model.solver.load_rc()
diff --git a/src/pyoframe/model.py b/src/pyoframe/model.py
index cd8e72b..373cc46 100644
--- a/src/pyoframe/model.py
+++ b/src/pyoframe/model.py
@@ -37,7 +37,7 @@ class Model(AttrContainerMixin):
         "result",
         "attr",
         "sense",
-        "objective"
+        "objective",
     ]
 
     def __init__(self, min_or_max: Union[ObjSense, ObjSenseValue], name=None, **kwargs):
@@ -75,7 +75,7 @@ def constraints(self):
     @property
     def objective(self):
         return self._objective
-    
+
     @objective.setter
     def objective(self, value):
         value = Objective(value)