Fix Gradio Progress IndexError in Gradio 4.44.0

- Removed 'if progress:' checks that cause IndexError
- Wrapped all progress() calls in try/except blocks
- App now gracefully handles progress tracking failures

app.py

@@ -33,12 +33,16 @@ def run_comparison(iterations: int, seed: int, use_deterministic: bool, device:
             import torch
             if not torch.cuda.is_available():
                 device = "cpu"
-                if progress:
+                try:
                     progress(0.0, desc="⚠️ GPU not available, using CPU...")
+                except (AttributeError, IndexError, TypeError):
+                    pass
         except ImportError:
             device = "cpu"
-            if progress:
+            try:
                 progress(0.0, desc="⚠️ PyTorch not available, using CPU...")
+            except (AttributeError, IndexError, TypeError):
+                pass
         except Exception:
             device = "cpu"
     
@@ -58,8 +62,11 @@ def run_comparison(iterations: int, seed: int, use_deterministic: bool, device:
         cmd.extend(["--seed", str(int(seed))])
     
     try:
-        if progress:
+        # Safe progress update - wrap in try/except for Gradio compatibility
+        try:
             progress(0.1, desc="Starting comparison...")
+        except (AttributeError, IndexError, TypeError):
+            pass
         
         # Ensure environment variables are passed to subprocess
         env = os.environ.copy()
@@ -80,8 +87,11 @@ def run_comparison(iterations: int, seed: int, use_deterministic: bool, device:
         # Combine outputs
         full_output = f"=== STDOUT ===\n{stdout_text}\n\n=== STDERR ===\n{stderr_text}"
         
-        if progress:
+        # Safe progress update
+        try:
             progress(0.9, desc="Processing results...")
+        except (AttributeError, IndexError, TypeError):
+            pass
         
         if result.returncode != 0:
             return f"❌ Error occurred:\n{full_output}", None
@@ -100,8 +110,10 @@ def run_comparison(iterations: int, seed: int, use_deterministic: bool, device:
                 break
         
         if plot_path:
-            if progress:
+            try:
                 progress(1.0, desc="Complete!")
+            except (AttributeError, IndexError, TypeError):
+                pass
             return f"✅ Comparison complete!\n\n{stdout_text}", str(plot_path)
         else:
             # Return output even if plot not found (might still be useful)