Add date and time to scenario difference file name.

premise/export.py

@@ -14,6 +14,7 @@
 from multiprocessing.pool import ThreadPool as Pool
 from pathlib import Path
 from typing import Any, Dict, List
+from datetime import datetime
 
 import numpy as np
 import pandas as pd
@@ -883,13 +884,13 @@ def generate_superstructure_db(
         )
 
     if file_format == "excel":
-        filepath_sdf = filepath / f"scenario_diff_{db_name}.xlsx"
+        filepath_sdf = filepath / f"scenario_diff_{db_name}_{datetime.now()}.xlsx"
         df.to_excel(filepath_sdf, index=False)
     elif file_format == "csv":
-        filepath_sdf = filepath / f"scenario_diff_{db_name}.csv"
+        filepath_sdf = filepath / f"scenario_diff_{db_name}_{datetime.now()}.csv"
         df.to_csv(filepath_sdf, index=False, sep=";", encoding="utf-8-sig")
     elif file_format == "feather":
-        filepath_sdf = filepath / f"scenario_diff_{db_name}.feather"
+        filepath_sdf = filepath / f"scenario_diff_{db_name}_{datetime.now()}.feather"
         df.to_feather(filepath_sdf)
     else:
         raise ValueError(f"Unknown format {file_format}")