Update app.py

app.py

@@ -220,6 +220,17 @@ def inference(file_name, _clear_punctuation_references, _clear_punctuation_predi
     results.append(f"- RTF: {round(rtf, 4)}")
 
     if _show_chars:
+        all_chars = set()
+        for ref in references:
+            for c in ref:
+                all_chars.add(c)
+
+        sorted_chars = natsorted(list(all_chars))
+
+        results.append("")
+        results.append(f"Chars in references:")
+        results.append(f"{sorted_chars}")
+
         all_chars = set()
         for pred in predictions:
             for c in pred:
@@ -256,7 +267,7 @@ with demo:
                 label="Clear punctuation (in predictions), some chars and convert to lowercase",
             )
             show_chars = gr.Checkbox(
-                label="Show chars in predictions",
+                label="Show chars in references/predictions",
             )
             batch_mode = gr.Checkbox(
                 label="Use batch mode",