Update app.py

app.py

@@ -1,30 +1,60 @@
+# ---------- DO THIS FIRST ----------
 import os
 os.environ.setdefault("GRADIO_USE_CDN", "true")
 
-import spaces
+# Safe import of 'spaces' (works on CPU or ZeroGPU)
+try:
+    import spaces  # HF Spaces SDK
+except Exception:
+    class _DummySpaces:
+        def GPU(self, *_, **__):
+            def _decorator(fn): return fn
+            return _decorator
+    spaces = _DummySpaces()
+
 import gradio as gr
 from fastapi import FastAPI
 
-# Public GPU probes
+# Log a few things so we can see them in the container logs
+try:
+    import sys
+    print("== Sanity ==")
+    print("gradio.__version__:", getattr(gr, "__version__", "unknown"))
+    print("SPACE_RUNTIME:", os.getenv("SPACE_RUNTIME"))
+    print("PY:", sys.version)
+except Exception as e:
+    print("sanity log error:", e)
+
+# ---------- PUBLIC GPU PROBES (harmless on CPU) ----------
 @spaces.GPU(duration=10)
-def gpu_probe(a: int = 1, b: int = 1): return a + b
+def gpu_probe(a: int = 1, b: int = 1):
+    return a + b
 
 @spaces.GPU(duration=10)
-def gpu_echo(x: str = "ok"): return x
-
-# Simple UI
-with gr.Blocks() as demo:
-    gr.Markdown("### ✅ Minimal Space is running")
-    inp = gr.Textbox(label="Say something")
-    out = gr.Textbox(label="Echo")
+def gpu_echo(x: str = "ok"):
+    return x
+
+# ---------- Tiny Gradio UI ----------
+with gr.Blocks(title="Hello Space") as demo:
+    gr.Markdown("### ✅ App is alive\nType to echo.")
+    inp = gr.Textbox(label="Input", value="hello")
+    out = gr.Textbox(label="Output")
     inp.submit(lambda s: f"echo: {s}", inp, out)
 
-demo = demo.queue()
+# Queue BEFORE mounting
+demo = demo.queue(max_size=8)
 
-# FastAPI wrapper with health
+# ---------- ASGI app and fast health ----------
 app = FastAPI()
 
 @app.get("/health")
-def _health(): return {"ok": True}
+def _health():
+    return {"ok": True}
 
+# Mount Gradio at "/" so the supervisor sees it
 app = gr.mount_gradio_app(app, demo, path="/")
+
+# (Do NOT call demo.launch() on Spaces)
+if __name__ == "__main__":
+    import uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=7860)