update

app.py

@@ -23,9 +23,15 @@ def calculate_accuracy(uploaded_file):
     """Calculate Task 1 accuracy from uploaded predictions"""
     try:
         # Read uploaded file
-        content = uploaded_file.read()
-        if isinstance(content, bytes):
-            content = content.decode('utf-8')
+        if hasattr(uploaded_file, 'read'):
+            # File-like object
+            content = uploaded_file.read()
+            if isinstance(content, bytes):
+                content = content.decode('utf-8')
+        else:
+            # NamedString or file path
+            with open(uploaded_file, 'r') as f:
+                content = f.read()
         
         predictions = json.loads(content)