update

app.py

@@ -52,9 +52,9 @@ def main(property: str, smiles: str, smiles_file: str):
         kwargs["algorithm_version"] = version
 
     model = algo(config(**kwargs))
-    if smiles is not None and smiles_file is not None:
+    if smiles != "" and smiles_file is not None:
         raise ValueError("Pass either smiles or smiles_file, not both.")
-    elif smiles is not None:
+    elif smiles != "":
         smiles = [smiles]
     elif smiles_file is not None:
         smiles = pd.read_csv(smiles_file.name, header=None, sep="\t")[0].tolist()
@@ -92,7 +92,7 @@ if __name__ == "__main__":
     metadata_root = pathlib.Path(__file__).parent.joinpath("model_cards")
 
     examples = [
-        ["Qed", None, metadata_root.joinpath("examples.smi")],
+        ["Qed", "", metadata_root.joinpath("examples.smi")],
         [
             "Esol",
             "CN1CCN(CCCOc2ccc(N3C(=O)C(=Cc4ccc(Oc5ccc([N+](=O)[O-])cc5)cc4)SC3=S)cc2)CC1",