Update "Version" to "1.5.1"

Author: mikeqfu

pyhelpers/data/metadata.json

@@ -5,7 +5,7 @@
     "Affiliation": "Birmingham Centre for Railway Research and Education, School of Engineering, University of Birmingham",
     "Email": "[email protected]",
     "Description": "An open-source toolkit for facilitating Python users' data manipulation tasks.",
-    "Version": "1.5.0",
+    "Version": "1.5.1",
     "License": "GPLv3+",
     "First release": "September 2019"
 }

pyhelpers/store.py

@@ -234,7 +234,7 @@ def save_spreadsheet(data, path_to_file, index=False, engine=None, delimiter=','
     """
 
     _, filename = _check_saving_path(path_to_file=path_to_file, verbose=verbose, ret_info=True)
-    filename_, ext = os.path.splitext(filename)
+    _, ext = os.path.splitext(filename)
 
     valid_extensions = {".txt", ".csv", ".xlsx", ".xls", ".ods", ".odt"}
     assert ext in valid_extensions, f"File extension must be one of {valid_extensions}."