Upload app.py

app.py

@@ -650,15 +650,48 @@ def optimize_prompt(initial_prompt: str, dataset_name: str, dataset_split: str,
         os.makedirs(output_dir, exist_ok=True)
 
         try:
-            # Run evolution
-            # Note: OpenEvolve may show "Initialized process parallel controller" warnings
-            # but they are harmless in this single-worker configuration
-            result = run_evolution(
-                initial_program=initial_prompt_path,
-                evaluator=evaluator_path,
-                config=config_path,
-                output_dir=output_dir
-            )
+            # Monkey-patch to disable process pool in Gradio environment
+            # This prevents "signal only works in main thread" errors
+            import sys
+            import openevolve.controller.parallel_controller as pc_module
+
+            # Save original class
+            OriginalProcessController = pc_module.ProcessParallelController
+
+            # Create a no-op version that doesn't use multiprocessing
+            class NoOpProcessController:
+                def __init__(self, *args, **kwargs):
+                    self.num_workers = 1
+                    pass
+
+                def __enter__(self):
+                    return self
+
+                def __exit__(self, *args):
+                    pass
+
+                def submit(self, func, *args, **kwargs):
+                    # Execute directly instead of in subprocess
+                    return func(*args, **kwargs)
+
+                def map(self, func, *args):
+                    # Execute directly instead of in subprocess
+                    return [func(*a) for a in zip(*args)]
+
+            # Replace the process controller
+            pc_module.ProcessParallelController = NoOpProcessController
+
+            try:
+                # Run evolution
+                result = run_evolution(
+                    initial_program=initial_prompt_path,
+                    evaluator=evaluator_path,
+                    config=config_path,
+                    output_dir=output_dir
+                )
+            finally:
+                # Restore original class
+                pc_module.ProcessParallelController = OriginalProcessController
 
             progress(0.80, desc="Parsing evolution history...")