py2 compat

Author: mr-c

cwltool/provenance.py

@@ -806,7 +806,7 @@ def used_artefacts(self,
                     self.document.used(
                         process_run_id, entity, datetime.datetime.now(), None,
                         {"prov:role": prov_role})
-                except FileNotFoundError:
+                except OSError:
                     pass
 
     def generate_output_prov(self,
@@ -1582,7 +1582,7 @@ def _relativise_files(self, structure):
             for val in structure.values():
                 try:
                     self._relativise_files(val)
-                except FileNotFoundError:
+                except OSError:
                     pass
             return