Update app.py

API payload seems to be dumped as JSON, so let's try to recover it.

app.py

@@ -11,6 +11,14 @@ clf = wbgtopic.WBGDocTopic()
 
 @spaces.GPU(enable_queue=True, duration=50)
 def fn(inputs):
+    if isinstance(inputs, str):
+        # API payload seems to be dumped as JSON, so let's try to recover it.
+        try:
+            inputs = json.loads(inputs)
+            assert isinstance(inputs, list) and isinstance(inputs[0], str)
+        except Exception:
+            pass
+
     return clf.suggest_topics(inputs)