fix: stub audioop/pyaudioop in sys.modules before gradio import (Python 3.13)

app.py

@@ -7,10 +7,18 @@ returns 3-day OHLC forecasts using Kronos-mini on ZeroGPU (H200).
 API: POST /predict with JSON string → returns JSON string
 """
 
+import sys
+import types
+
+# Stub audioop for Python 3.13 — removed from stdlib but pydub (gradio dep) tries to import it.
+# We don't use any audio features so a no-op stub is safe.
+for _mod in ('audioop', 'pyaudioop'):
+    if _mod not in sys.modules:
+        sys.modules[_mod] = types.ModuleType(_mod)
+
 import spaces
 import gradio as gr
 import json
-import sys
 import os
 import pandas as pd
 

requirements.txt

@@ -1,7 +1,6 @@
 torch>=2.0.0
 einops==0.8.1
 safetensors==0.6.2
-audioop-lts
 pandas
 numpy<2
 tqdm