changes per code review, fix failing test

Author: mitzimorris

cmdstanpy/utils.py

@@ -609,7 +609,7 @@ def scan_optimize_csv(path: str, save_iters: bool = False) -> Dict[str, Any]:
             if save_iters:
                 all_iters[i, :] = [float(x) for x in xs]
             if i == iters - 1:
-                mle = np.array([float(x) for x in xs])
+                mle = np.array(xs, dtype=float)
     dict['mle'] = mle
     if save_iters:
         dict['all_iters'] = all_iters

test/test_optimize.py

@@ -55,7 +55,9 @@ def test_instantiate(self):
         self.assertAlmostEqual(mle.optimized_params_dict['y'], 1, places=3)
 
     def test_instantiate_from_csvfiles(self):
-        csvfiles_path = os.path.join(DATAFILES_PATH, 'optimize')
+        csvfiles_path = os.path.join(
+            DATAFILES_PATH, 'optimize', 'rosenbrock_mle.csv'
+        )
         mle = from_csv(path=csvfiles_path)
         self.assertIn('CmdStanMLE: model=rosenbrock', mle.__repr__())
         self.assertIn('method=optimize', mle.__repr__())