fixup! fixup! fixup! fixup! fixup! fixup! fixup! Trying to make it cross platform

Author: iurisilvio

roboflow/util/folderparser.py

@@ -132,16 +132,16 @@ def _build_image_and_annotation_maps(annotationFiles):
         )
         if parsedType == "coco":
             for imageRef in parsed["images"]:
-                imgRefMap[f"{filename}/{imageRef['file_name']}"] = imageRef
+                imgRefMap[os.path.join(filename, imageRef['file_name'])] = imageRef
             for annotation in parsed["annotations"]:
-                annotationMap[f"{dirname}/{annotation['image_id']}"].append(annotation)
+                annotationMap[os.path.join(dirname, annotation['image_id'])].append(annotation)
     return imgRefMap, annotationMap
 
 
 def _filterIndividualAnnotations(image, annotation, format, imgRefMap, annotationMap):
     parsed = annotation["parsed"]
     if format == "coco":
-        imgReference = imgRefMap.get(f"{annotation['file']}/{image['name']}")
+        imgReference = imgRefMap.get(os.path.join(annotation['file'], image['name']))
         if imgReference:
             # workaround to make Annotations.js correctly identify this as coco in the backend
             fake_annotation = {
@@ -153,7 +153,9 @@ def _filterIndividualAnnotations(image, annotation, format, imgRefMap, annotatio
                 "iscrowd": 0,
             }
             _annotation = {"name": "annotation.coco.json"}
-            annotations_for_image = annotationMap.get(f"{image['dirname']}/{imgReference['id']}", [])
+            annotations_for_image = annotationMap.get(
+                os.path.join(image['dirname'], imgReference['id']), []
+            )
             _annotation["rawText"] = json.dumps(
                 {
                     "info": parsed["info"],
@@ -255,7 +257,7 @@ def _map_labelmaps_to_annotations(annotations, labelmaps):
     if not labelmaps:
         return
     labelmapmap = {lm["dirname"]: lm for lm in labelmaps}
-    rootLabelmap = labelmapmap.get("/")
+    rootLabelmap = labelmapmap.get(os.sep)
     if len(labelmapmap) < len(labelmaps):
         print("warning: unexpectedly found multiple labelmaps per directory")
         print([lm["file"] for lm in labelmaps])