How can I rename folders to 'surname, firstname' in Python?

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Okay, from my experience, renaming folders in Python is quite straightforward using os.rename and split. You can use this method if your folders follow a standard format (e.g., first name followed by surname). Here’s how you can do it:

import os

folder_path = "C:/Test"
for folder_name in os.listdir(folder_path):
    folder_full_path = os.path.join(folder_path, folder_name)
    
    if ',' in folder_name:
        continue  # Skip if the folder name already contains a comma
    
    # Split the name by spaces
    name_parts = folder_name.split()
    surname = name_parts[-1]
    first_names = ' '.join(name_parts[:-1])
    
    # Construct the new name
    new_name = f"{surname}, {first_names}"
    
    # Rename the folder
    new_folder_full_path = os.path.join(folder_path, new_name)
    os.rename(folder_full_path, new_folder_full_path)
    print(f"Renamed {folder_name} to {new_name}")

This should work fine for single first names, and it’s simple to use. Of course, if you’re using a version of Python where you’re dealing with Python 2to3 transitions, you’d want to ensure everything’s compatible.