How to rename music files by ID3 tags in Python

import os
import re
from pathlib import Path

def sanitize_filename(name: str) -> str:
    return re.sub(r'[<>:"/\\|?*]', '_', name).strip()

def rename_mp3_from_id3(path: Path) -> None:
    for f in path.glob("*.mp3"):
        # Mock ID3 extraction: derive artist/title from filename
        stem = f.stem
        if " - " in stem:
            artist, title = stem.split(" - ", 1)
        else:
            artist, title = "Unknown", stem
        
        new_name = f"{sanitize_filename(artist)} - {sanitize_filename(title)}.mp3"
        new_path = f.with_name(new_name)
        
        if f != new_path:
            print(f"Renaming '{f.name}' -> '{new_name}'")
            f.rename(new_path)

if __name__ == "__main__":
    # Create mock files to demonstrate
    test_dir = Path("mock_music")
    test_dir.mkdir(exist_ok=True)
    for name in ["Artist One - Song A.mp3", "Artist Two - Song B.mp3"]:
        (test_dir / name).touch()
    
    rename_mp3_from_id3(test_dir)
    print("Files in directory:", sorted(p.name for p in test_dir.glob("*.mp3")))