Release 1.0.0b2.

combo/data/dataset.py

 import copy
 import logging
+import pathlib
 from typing import Union, List, Dict, Iterable, Optional, Any, Tuple
 
 import conllu
@@ -79,7 +80,9 @@ class UniversalDependenciesDatasetReader(allen_data.DatasetReader):
         file_path = [file_path] if len(file_path.split(",")) == 0 else file_path.split(",")
 
         for conllu_file in file_path:
-            with open(conllu_file, "r") as file:
+            file = pathlib.Path(conllu_file)
+            assert conllu_file and file.exists(), f"File with path '{conllu_file}' does not exists!"
+            with file.open("r"):
                 for annotation in conllu.parse_incr(file, fields=self.fields, field_parsers=self.field_parsers):
                     yield self.text_to_instance(annotation)