Fix delete artifacts after upload

clearml/backend_interface/metrics/events.py

@@ -339,7 +339,9 @@ class UploadEvent(MetricsEventAdapter):
             # noinspection PyBroadException
             try:
                 output = pathlib2.Path(self._local_image_path)
-                if not output.is_file():
+                if output.is_file():
+                    local_file = output
+                else:
                     output = None
             except Exception:
                 output = None

clearml/binding/artifacts.py

@@ -328,6 +328,7 @@ class Artifacts(object):
             artifact_object = LazyEvalWrapper._load_object(artifact_object)
 
         pathlib_types = (Path, pathlib_Path,) if pathlib_Path is not None else (Path,)
+        local_filename = None
 
         # try to convert string Path object (it might reference a file/folder)
         # dont not try to serialize long texts.