Update app.py

app.py

@@ -235,7 +235,9 @@ def predict_peptide_from_file(base_model_path, finetuned_model_path, file_obj, p
         Path.cwd() / "predicted_peptides.csv"
     )
     
-    results_df.to_csv(outpath,header=True, index=False)
+    str_outpath = str(outpath)  # work around as the latest gr.File needs a string_type input.
+
+    results_df.to_csv(str_outpath, header=True, index=False)
     
     return outpath