"values" has been changed ot the "value" in the ValueError message.

Author: b0noI

sklearn/grid_search.py

@@ -332,11 +332,11 @@ def _check_param_grid(param_grid):
 
             check = [isinstance(v, k) for k in (list, tuple, np.ndarray)]
             if True not in check:
-                raise ValueError("Parameter({0}) values should be a list."
+                raise ValueError("Parameter ({0}) value should be a list."
                                  "".format(name))
 
             if len(v) == 0:
-                raise ValueError("Parameter({0}) values should be a non-empty "
+                raise ValueError("Parameter ({0}) value should be a non-empty "
                                  "list.".format(name))