fix json.decoder.JSONDecodeError in coco to yolov5 conversion (#786)

Co-authored-by: fatih <[email protected]>

sahi/utils/coco.py

@@ -1535,7 +1535,7 @@ def export_yolov5_images_and_txts_from_coco_object(output_dir, coco, ignore_nega
 
 
 def export_single_yolov5_image_and_corresponding_txt(
-    coco_image, coco_image_dir, output_dir, ignore_negative_samples=False
+    coco_image, coco_image_dir, output_dir, ignore_negative_samples=False, disable_symlink=False
 ):
     """
     Generates yolov5 formatted image symlink and annotation txt file.
@@ -1578,7 +1578,12 @@ def export_single_yolov5_image_and_corresponding_txt(
             yolo_image_path = str(parent_dir / (filename + filesuffix))
             name_increment += 1
         # create a symbolic link pointing to coco_image_path named yolo_image_path
-        os.symlink(coco_image_path, yolo_image_path)
+        if disable_symlink:
+            import shutil
+
+            shutil.copy(coco_image_path, yolo_image_path)
+        else:
+            os.symlink(coco_image_path, yolo_image_path)
         # calculate annotation normalization ratios
         width = coco_image.width
         height = coco_image.height

sahi/utils/file.py

@@ -28,12 +28,13 @@ def unzip(file_path: str, dest_dir: str):
         zf.extractall(dest_dir)
 
 
-def save_json(data, save_path, indent: Optional[int] = 4):
+def save_json(data, save_path, indent: Optional[int] = None):
     """
     Saves json formatted data (given as "data") as save_path
     Example inputs:
         data: {"image_id": 5}
         save_path: "dirname/coco.json"
+        indent: Train json files with indent=None, val json files with indent=4
     """
     # create dir if not present
     Path(save_path).parent.mkdir(parents=True, exist_ok=True)