Update simplex.py

Author: aryanexe07

linear_programming/simplex.py

@@ -302,10 +302,11 @@ def run_simplex(self) -> dict[Any, Any]:
                 self.tableau = self.change_stage()
             else:
                 self.tableau = self.pivot(row_idx, col_idx)
-        raise ValueError(
+        message = (
             f"Simplex did not converge within {Tableau.maxiter} iterations. "
             "The problem may be cycling or unbounded."
         )
+        raise ValueError(message)
 
     def interpret_tableau(self) -> dict[str, float]:
         """Given the final tableau, add the corresponding values of the basic