diff --git a/python/py_src/sudachipy/command_line.py b/python/py_src/sudachipy/command_line.py
index 07f59c19..e7574bf1 100644
--- a/python/py_src/sudachipy/command_line.py
+++ b/python/py_src/sudachipy/command_line.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2019 Works Applications Co., Ltd.
+# Copyright (c) 2019-2024 Works Applications Co., Ltd.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -24,6 +24,13 @@
 from . import sudachipy
 
 
+logging.basicConfig(
+    style="{",
+    format='{levelname} {asctime} [{module}:{funcName}:{lineno}] {message}',
+    datefmt="%m-%d-%Y %H:%M:%S",
+)
+
+
 def _set_default_subparser(self, name, args=None):
     """
     copy and modify code from https://bitbucket.org/ruamel/std.argparse
@@ -51,7 +58,7 @@ def _set_default_subparser(self, name, args=None):
 argparse.ArgumentParser.set_default_subparser = _set_default_subparser
 
 
-def run(tokenizer, input_, output, print_all, morphs, is_stdout):
+def run(tokenizer, input_, output, print_all, pos_list, is_stdout):
     # get an empty MorphemeList for memory reuse
     mlist = tokenizer.tokenize("")
     for line in input_:
@@ -60,7 +67,7 @@ def run(tokenizer, input_, output, print_all, morphs, is_stdout):
         for m in tokenizer.tokenize(line, out=mlist):
             list_info = [
                 m.surface(),
-                morphs[m.part_of_speech_id()],
+                pos_list[m.part_of_speech_id()],
                 m.normalized_form()]
             if print_all:
                 list_info += [
@@ -97,27 +104,27 @@ def _command_tokenize(args, print_usage):
     if args.fpath_out:
         output = open(args.fpath_out, "w", encoding="utf-8")
 
-    stdout_logger = logging.getLogger(__name__)
-    handler = logging.StreamHandler(sys.stdout)
-    handler.setLevel(logging.DEBUG)
-    stdout_logger.addHandler(handler)
-    stdout_logger.setLevel(logging.DEBUG)
-    stdout_logger.propagate = False
+    logger = logging.getLogger(__name__)
+    logger.setLevel(logging.DEBUG)
 
     print_all = args.a
+    debug = args.d
+    if debug:
+        logger.warning("-d option is not implemented in python.")
 
     try:
         dict_ = Dictionary(config_path=args.fpath_setting,
                            dict_type=args.system_dict_type)
         # empty matcher - get all POS tags
-        all_morphs = dict_.pos_matcher([()])
+        all_pos_matcher = dict_.pos_matcher([()])
         # precompute output POS strings
-        morphs = [",".join(ms) for ms in all_morphs]
+        pos_list = [",".join(ms) for ms in all_pos_matcher]
 
         tokenizer_obj = dict_.create(mode=args.mode)
         input_ = fileinput.input(
             args.in_files, openhook=fileinput.hook_encoded("utf-8"))
-        run(tokenizer_obj, input_, output, print_all, morphs, is_stdout=args.fpath_out is None)
+        run(tokenizer_obj, input_, output, print_all,
+            pos_list, is_stdout=args.fpath_out is None)
     finally:
         if args.fpath_out:
             output.close()
@@ -139,7 +146,8 @@ def _command_build(args, print_usage):
 
     out_file = Path(args.out_file)
     if out_file.exists():
-        print("File", out_file, "already exists, refusing to overwrite it", file=sys.stderr)
+        print("File", out_file,
+              "already exists, refusing to overwrite it", file=sys.stderr)
         return
 
     description = args.description or ""
@@ -161,7 +169,8 @@ def _command_build(args, print_usage):
 def _command_user_build(args, print_usage):
     system = Path(args.system_dic)
     if not system.exists():
-        print("System dictionary file", system, "does not exist", file=sys.stderr)
+        print("System dictionary file", system,
+              "does not exist", file=sys.stderr)
         return print_usage()
 
     in_files = []
@@ -174,7 +183,8 @@ def _command_user_build(args, print_usage):
 
     out_file = Path(args.out_file)
     if out_file.exists():
-        print("File", out_file, "already exists, refusing to overwrite it", file=sys.stderr)
+        print("File", out_file,
+              "already exists, refusing to overwrite it", file=sys.stderr)
         return
 
     description = args.description or ""
@@ -217,7 +227,7 @@ def main():
     parser_tk.add_argument("-a", action="store_true",
                            help="print all of the fields")
     parser_tk.add_argument("-d", action="store_true",
-                           help="print the debug information")
+                           help="print the debug information (not implemented yet)")
     parser_tk.add_argument("-v", "--version", action="store_true",
                            dest="version", help="print sudachipy version")
     parser_tk.add_argument("in_files", metavar="file",