Removed unnecessary variable n_dim in utils.check_arrays, removed unnecessary parens in same place

Author: hamzeh

sklearn/utils/validation.py

@@ -249,11 +249,10 @@ def check_arrays(*arrays, **options):
                 else:
                     array = np.asarray(array, dtype=dtype)
                 _assert_all_finite(array)
-            n_dim = array.ndim
 
-            if n_dim > 2:
-                raise ValueError("Found array with n_dim %d. Expected <= 2" %
-                                (n_dim))
+            if array.ndim > 2:
+                raise ValueError("Found array with dim %d. Expected <= 2" %
+                                 array.ndim)
 
         if copy and array is array_orig:
             array = array.copy()