Fix kcoords and tests

Author: alejoe91

.github/scripts/test_kilosort4_ci.py

@@ -114,6 +114,7 @@
 
 if parse(kilosort.__version__) >= parse("4.0.37"):
     PARAMS_TO_TEST_DICT.update({"max_cluster_subset": 20})
+    PARAMETERS_NOT_AFFECTING_RESULTS.append("max_cluster_subset")
 
 
 PARAMS_TO_TEST = list(PARAMS_TO_TEST_DICT.keys())

src/spikeinterface/sorters/external/kilosort4.py

@@ -440,7 +440,7 @@ def _setup_json_probe_map(cls, recording, sorter_output_folder):
         yc = positions[:, 1]
         unique_groups = set(groups)
         group_map = {group: idx for idx, group in enumerate(unique_groups)}
-        kcoords = np.array(group_map.values(), dtype=int)
+        kcoords = np.array(list(group_map.values()), dtype=int)
 
         probe = {
             "chanMap": chanMap,