Вот несколько методов пакетного переименования файлов в Python:

1. Использование модуля os:

   import os
   def batch_rename(directory, prefix):
      for filename in os.listdir(directory):
          if filename.endswith('.txt'):  # Filter files by extension, e.g., .txt
              new_name = prefix + filename
              os.rename(os.path.join(directory, filename), os.path.join(directory, new_name))
   # Usage example
   batch_rename('/path/to/directory', 'new_')

2. Использование модуля glob:

   import glob
   import os
   def batch_rename(directory, prefix):
      for file_path in glob.glob(os.path.join(directory, '*.txt')):  # Filter files by extension
          new_name = prefix + os.path.basename(file_path)
          os.rename(file_path, os.path.join(directory, new_name))
   # Usage example
   batch_rename('/path/to/directory', 'new_')

3. Использование модуля pathlib(Python 3.4 и выше):

   import pathlib
   def batch_rename(directory, prefix):
      pathlist = pathlib.Path(directory).rglob('*.txt')  # Recursively find files by extension
      for path in pathlist:
          new_name = prefix + path.name
          path.rename(path.with_name(new_name))
   # Usage example
   batch_rename('/path/to/directory', 'new_')

4. Использование регулярных выражений:

   import os
   import re
   def batch_rename(directory, pattern, replacement):
      for filename in os.listdir(directory):
          if filename.endswith('.txt'):  # Filter files by extension
              new_name = re.sub(pattern, replacement, filename)
              os.rename(os.path.join(directory, filename), os.path.join(directory, new_name))
   # Usage example: Replace 'old_' with 'new_'
   batch_rename('/path/to/directory', r'^old_', 'new_')