run_length_encoding syntax error fix

app.py

@@ -37,8 +37,8 @@ class DetectionResult:
     def from_dict(cls, detection_dict: Dict) -> 'DetectionResult':
         return cls(
             score=detection_dict['score'],
-            label=detection_dict['label'],
-            box=BoundingBox(
+            label: detection_dict['label'],
+            box: BoundingBox(
                 xmin=detection_dict['box']['xmin'],
                 ymin=detection_dict['box']['ymin'],
                 xmax=detection_dict['box']['xmax'],
@@ -170,7 +170,8 @@ def run_length_encoding(mask):
                 rle.append(count)
             count = 1
             last_val = pixel
-    if count > 0, rle.append(count)
+    if count > 0:
+        rle.append(count)
     return rle
 
 def detections_to_json(detections):