Use pathlib2 exclusively

Don't use pathlib library

Author: psafont

cwltool/load_tool.py

@@ -6,10 +6,7 @@
 import logging
 import re
 import urlparse
-try:
-    import pathlib  # type: ignore
-except:
-    import pathlib2 as pathlib  # type: ignore
+import pathlib2
 
 from typing import Any, AnyStr, Callable, cast, Dict, Text, Tuple, Union
 from ruamel.yaml.comments import CommentedSeq, CommentedMap
@@ -47,7 +44,7 @@ def fetch_document(argsworkflow,   # type: Union[Text, dict[Text, Any]]
         if split.scheme:
             uri = argsworkflow
         elif os.path.exists(os.path.abspath(argsworkflow)):
-            uri = pathlib.Path(os.path.abspath(argsworkflow)).as_uri()
+            uri = pathlib2.Path(os.path.abspath(argsworkflow)).as_uri()
         elif resolver:
             uri = resolver(document_loader, argsworkflow)
 

requirements.txt

@@ -6,4 +6,4 @@ shellescape==3.4.1
 schema-salad>=2.1.20161216210732,<3
 cwltest>=1.0.20160907111242
 typing==3.5.2.2 ; python_version>="2.7"
-pathlib2==2.1.0 ; python_version<"3.4"
+pathlib2==2.1.0