from pathlib import Path

def filter_by_suffix(filenames: list[str], suffix: str) -> list[str]:
    # Retorna solo los archivos que tengan la extensión indicada
    suffix_list = []
    for filename in filenames:
        temp_path = Path(filename)
        if temp_path.suffix == suffix:
            suffix_list.append(filename)
    return suffix_list