evaluates, copies, flatten, and renames my sample files

flatten.py

import os
import shutil
import re

def sanitize_filename(filename):
    """
    Sanitizes the filename to ensure it contains only alphanumeric characters and underscores,
    replacing any special characters with underscores. Preserves the file extension.
    """
    # Separate the extension and the name
    name, ext = os.path.splitext(filename)
    # Replace non-alphanumeric characters (excluding the period for the extension) with underscores
    sanitized_name = re.sub(r'[^0-9a-zA-Z.]+', '_', name)
    return sanitized_name + ext

def flatten_and_rename(src_directory, target_directory):
    # Ensure target directory exists
    if not os.path.exists(target_directory):
        os.makedirs(target_directory)
    
    # Walk through all directories and files in the source directory
    for root, dirs, files in os.walk(src_directory):
        for file in files:
            # Construct the original full file path
            original_path = os.path.join(root, file)
            
            # Generate the new file name by replacing directory separators with underscores
            new_file_name = original_path.replace(src_directory, "").replace(os.sep, "_")[1:]
            if any(ext in new_file_name for ext in [".mp3", ".wav", ".aif"]):
                new_file_name = sanitize_filename(new_file_name)
            
                # Construct the full path for the new file location
                new_file_path = os.path.join(target_directory, new_file_name)
            
                # Move and rename the file
                shutil.copy(original_path, new_file_path)
                print(f"Moved and renamed: {original_path} -> {new_file_path}")


# Example usage
src_directory = "./Samples"
target_directory = "./Samples_Flattened"
flatten_and_rename(src_directory, target_directory)