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app.py

@@ -29,6 +29,38 @@ import numpy as np
 import spaces  # type: ignore
 import gradio as gr
 
+# --------------------------------------------------------------------------- #
+# Monkey-patch for a known Gradio 4.44 / gradio_client bug: when the API-info
+# endpoint builds a schema for an output that includes `additionalProperties:
+# True` (a bool, not a dict), `gradio_client.utils.get_type()` tries
+# `"const" in schema` and raises `TypeError: argument of type 'bool' is not
+# iterable`. Our `gr.JSON` output lands in that code path on first page load
+# and crashes the whole Space. Wrap `get_type` so any non-dict schema resolves
+# to the permissive "Any" type. Has no effect on well-typed schemas.
+# --------------------------------------------------------------------------- #
+try:
+    import gradio_client.utils as _gc_utils  # noqa: E402
+
+    _orig_get_type = _gc_utils.get_type
+
+    def _safe_get_type(schema):  # type: ignore[no-redef]
+        if not isinstance(schema, dict):
+            return "Any"
+        return _orig_get_type(schema)
+
+    _gc_utils.get_type = _safe_get_type  # type: ignore[assignment]
+
+    _orig_json_schema_to_python_type = _gc_utils._json_schema_to_python_type
+
+    def _safe_json_schema_to_python_type(schema, defs=None):  # type: ignore[no-redef]
+        if not isinstance(schema, dict):
+            return "Any"
+        return _orig_json_schema_to_python_type(schema, defs)
+
+    _gc_utils._json_schema_to_python_type = _safe_json_schema_to_python_type  # type: ignore[assignment]
+except Exception as _exc:  # noqa: BLE001
+    print(f"[v5] gradio_client get_type patch skipped: {_exc}")
+
 ROOT_DIR = Path(__file__).resolve().parent
 sys.path.insert(0, str(ROOT_DIR))
 
@@ -420,4 +452,10 @@ demo = build_demo()
 
 
 if __name__ == "__main__":
-    demo.queue().launch(server_name="0.0.0.0", server_port=int(os.environ.get("PORT", "7860")))
+    # On HF Gradio Spaces (including ZeroGPU) the platform runs `python app.py`
+    # and expects `demo.launch()` with no explicit server_name/port — the
+    # `spaces/zero/gradio.py` launch wrapper binds the port itself. Passing
+    # `server_name="0.0.0.0"` triggers the "localhost not accessible" self-
+    # check inside Gradio and crashes startup. Locally, `demo.launch()` still
+    # serves on 127.0.0.1:7860 by default.
+    demo.queue().launch(show_api=False)