Implemented KNN_purity callback

deepof/train_utils.py

@@ -116,14 +116,14 @@ def get_callbacks(
         k=knn_neighbors,
         samples=knn_samples,
         validation_data=X_val,
-        log_dir=os.path.join(outpath, "metrics"),
+        log_dir=os.path.join(outpath, "metrics", run_ID),
         variational=variational,
     )
 
     onecycle = deepof.model_utils.one_cycle_scheduler(
         X_train.shape[0] // batch_size * 250,
         max_rate=0.005,
-        log_dir=os.path.join(outpath, "metrics"),
+        log_dir=os.path.join(outpath, "metrics", run_ID),
     )
 
     callbacks = [run_ID, tensorboard_callback, knn, onecycle]