add run_evaluation.py

run_evaluation.py

@@ -52,7 +52,7 @@ def main():
                         help="Batch size")
     parser.add_argument("-k", "--kenlm", type=str, required=False, default=False,
                         help="Path to KenLM model")
-    parser.add_argument("-u", "--unigrams", type=str, required=False, default=False,
+    parser.add_argument("-u", "--unigrams", type=str, required=False, default=None,
                         help="Path to unigrams file")
     parser.add_argument("--num_workers", type=int, required=False, default=8,
                         help="KenLM's number of workers")