Merge pull request #157 from kiudee/fix_initialize_data

Fix initialize_data returning the same object several times.

tests/test_local.py

@@ -142,6 +142,11 @@ def test_initialize_data(tmp_path):
     assert len(y) == 0
     assert len(noise) == 0
     assert iteration == 0
+    # Check if the created data structured are not exactly the same list:
+    X.append(0)
+    assert len(X) == 1
+    assert len(y) == 0
+    assert len(noise) == 0
 
     # Create a temporary file for testing:
     testfile = tmp_path / "data.npz"

tune/local.py

@@ -248,7 +248,9 @@ def initialize_data(
         parameters in the data.
     """
     logger = logging.getLogger()
-    X = y = noise = []
+    X = []
+    y = []
+    noise = []
     iteration = 0
     if data_path is not None and resume:
         space = normalize_dimensions(parameter_ranges)