Downgrade transformers to 4.38.2 and add get_logits_warper monkeypatch

app.py

@@ -50,6 +50,31 @@ def _safe_isin(elements, test_elements, *args, **kwargs):
 torch.isin = _safe_isin
 print("Monkeypatch applied: torch.isin wrapper for int compatibility (robust)")
 
+# Monkeypatch transformers.generation.GenerationMixin._get_logits_warper
+# Fixes: TypeError: GenerationMixin._get_logits_warper() missing 1 required positional argument: 'device'
+# This is needed if transformers version requires 'device' but Coqui TTS calls it without.
+try:
+    from transformers.generation import GenerationMixin
+    _old_get_logits_warper = GenerationMixin._get_logits_warper
+    
+    def _safe_get_logits_warper(self, generation_config, device=None, **kwargs):
+        # Coqui calls it as: self._get_logits_warper(generation_config)
+        if device is None:
+             # Try to infer device from the model (self)
+             device = getattr(self, "device", "cpu")
+        
+        # Try calling with device first (fix for newer transformers)
+        try:
+            return _old_get_logits_warper(self, generation_config, device=device, **kwargs)
+        except TypeError:
+            # Fallback for older transformers that might not accept 'device'
+             return _old_get_logits_warper(self, generation_config, **kwargs)
+
+    GenerationMixin._get_logits_warper = _safe_get_logits_warper
+    print("Monkeypatch applied: GenerationMixin._get_logits_warper")
+except Exception as e:
+    print(f"Could not monkeypatch GenerationMixin: {e}")
+
 from fastapi import FastAPI, UploadFile, File, HTTPException, Form
 from fastapi.responses import FileResponse, StreamingResponse, RedirectResponse
 from fastapi.middleware.cors import CORSMiddleware

requirements.txt

@@ -6,5 +6,5 @@ torch==2.4.0
 torchaudio==2.4.0
 numpy
 scipy
-transformers==4.42.0
+transformers==4.38.2
 huggingface_hub