fix: inference classifier

run_classifier.py

@@ -426,11 +426,12 @@ def predict_wrapper(args, reader, exe, test_prog, test_pyreader, graph_vars,
         save_dir = os.path.dirname(save_path)
         if not os.path.exists(save_dir):
             os.makedirs(save_dir)
-        else:
-            log.warning('save dir exsits: %s, will skip saving' % save_dir)
-
 
         with open(save_path, 'w') as f:
+            if len(qids) == 0:
+                for s, p in zip(preds, probs):
+                    f.write('{}\t{}\n'.format(s, p))
+            else:
                 for id, s, p in zip(qids, preds, probs):
                     f.write('{}\t{}\t{}\n'.format(id, s, p))