Fix DATA_DIR to use function instead of module-level

app.py

@@ -9,7 +9,12 @@ import gradio as gr
 import plotly.graph_objects as go
 import plotly.io as pio
 
-DATA_DIR = Path(__file__).parent / "data"
+def get_data_dir():
+    """Get data directory path."""
+    try:
+        return Path(__file__).parent / "data"
+    except:
+        return Path("data")
 
 METRIC_LABELS = {
     "x_cm": "X (cm)",
@@ -130,9 +135,10 @@ CUSTOM_CSS = """
 @lru_cache(maxsize=1)
 def load_data():
     """Load all data files."""
-    metadata_path = DATA_DIR / "metadata.json"
-    end_effector_path = DATA_DIR / "end_effector.json"
-    hands_2d_path = DATA_DIR / "hands_2d.json"
+    data_dir = get_data_dir()
+    metadata_path = data_dir / "metadata.json"
+    end_effector_path = data_dir / "end_effector.json"
+    hands_2d_path = data_dir / "hands_2d.json"
     
     metadata = {}
     end_effector = {}
@@ -255,7 +261,7 @@ def build_interface():
     left_poses = sum(1 for f in end_effector.values() if f and isinstance(f, dict) and f.get('left_hand'))
     right_poses = sum(1 for f in end_effector.values() if f and isinstance(f, dict) and f.get('right_hand'))
     
-    video_path = DATA_DIR / "video.mp4"
+    video_path = get_data_dir() / "video.mp4"
     
     # Build data for left hand
     try: