Fix typo in path

Author: WardBrian

cmdstanpy/stanfit/__init__.py

@@ -74,7 +74,7 @@ def from_csv(
     elif isinstance(path, (str, os.PathLike)):
         if os.path.exists(path) and os.path.isdir(path):
             for file in os.listdir(path):
-                if os.path.splitext(path)[1] == ".csv":
+                if os.path.splitext(file)[1] == ".csv":
                     csvfiles.append(os.path.join(path, file))
         elif os.path.exists(path):
             csvfiles.append(str(path))

test/test_compliance.py

@@ -50,7 +50,7 @@ def test_optimize_copy_ability(self):
 
 class VariationalCompliance(unittest.TestCase):
     def test_variational_pickle_ability(self):
-        csvfiles_path = DATAFILES_PATH / 'variational' / 'eta_big_output.csv'
+        csvfiles_path = DATAFILES_PATH / 'variational'
         fit = cmdstanpy.from_csv(path=csvfiles_path)
         keys = fit.stan_variables().keys()
         pickled = pickle.dumps(fit)
@@ -59,7 +59,7 @@ def test_variational_pickle_ability(self):
         self.assertSequenceEqual(keys, unpickled.stan_variables().keys())
 
     def test_variational_copy_ability(self):
-        csvfiles_path = DATAFILES_PATH / 'variational' / 'eta_big_output.csv'
+        csvfiles_path = DATAFILES_PATH / 'variational'
         fit = cmdstanpy.from_csv(path=csvfiles_path)
         fit2 = copy.deepcopy(fit)
         self.assertSequenceEqual(