Update app.py

app.py

@@ -590,7 +590,6 @@
 
 
 
-
 import gradio as gr
 import torch
 import numpy as np
@@ -627,7 +626,7 @@ def calculate_iou(box1, box2):
 
 def remove_nested_boxes(boxes, iou_thresh=0.7):
     """Remove boxes that are nested inside others"""
-    if not boxes:
+    if len(boxes) == 0:
         return []
     
     # Add area to each box
@@ -657,7 +656,7 @@ def remove_nested_boxes(boxes, iou_thresh=0.7):
 
 def merge_boxes_into_lines(raw_boxes, y_overlap_thresh=0.5, x_gap_thresh=100):
     """Merge boxes into lines with better horizontal merging"""
-    if not raw_boxes or len(raw_boxes) == 0:
+    if raw_boxes is None or len(raw_boxes) == 0:
         return []
     
     # Convert polygons to rectangles
@@ -671,7 +670,7 @@ def merge_boxes_into_lines(raw_boxes, y_overlap_thresh=0.5, x_gap_thresh=100):
     # Remove nested boxes
     rects = remove_nested_boxes(rects)
     
-    if not rects:
+    if len(rects) == 0:
         return []
     
     # Sort by Y position