Renames files in a directory using names from a text file.

renamer.py

import os
import pathlib

def rename_files(directory, names_file, add_numbers=False, keep_extension=True):
  """Renames files in a directory using names from a text file, sorting files by name, optionally adding numbers with leading zeros, and optionally keeping extensions.

  Args:
    directory: The path to the directory containing the files.
    names_file: The path to the text file with new names.
    add_numbers: If True, adds numbers to the new file names.
    keep_extension: If True, keeps the original file extensions.
  """

  with open(names_file, 'r') as f:
    new_names = f.read().splitlines()

  files = sorted([f for f in os.listdir(directory) if not f.startswith('.')])

  if not files:
    print("No non-hidden files found in the directory.")
    return

  if len(files) != len(new_names):
    print("Number of non-hidden files and names don't match.")
    return

  num_files = len(files)
  num_digits = len(str(num_files))

  for i, file in enumerate(files):
    old_path = os.path.join(directory, file)
    base_name = new_names[i]
    old_ext = pathlib.Path(file).suffix

    if add_numbers:
      new_name = f"{str(i+1).zfill(num_digits)} - {base_name}"
    else:
      new_name = base_name

    if keep_extension:
      new_name += old_ext

    new_path = os.path.join(directory, new_name)
    try:
      os.rename(old_path, new_path)
      print(f"Renamed {old_path} to {new_path}")
    except OSError as e:
      print(f"Error renaming file: {e}")

# Example usage
directory = "path/to/your/directory"
names_file = "path/to/your/names.txt"
add_numbers = input("Add numbers to file names? (y/n): ").lower() == "y"
keep_extension = input("Keep original file extensions? (y/n): ").lower() == "y"
rename_files(directory, names_file, add_numbers, keep_extension)