import os
from pathlib import Path


def create_headerfiles(base_dir: str):
    """opens every *.csv in base_dir and saves first line to subfolder "Kopfzeilen" """
    dest = Path(f"{base_dir}\\Kopfzeilen")
    os.makedirs(dest, exist_ok=True)

    for source_file in Path(base_dir).glob("*.csv"):
        dest_file = dest / source_file.name
        with source_file.open("r", encoding="latin-1") as frh, dest_file.open("w", encoding="latin-1") as fwh:
            fwh.write(frh.readline())


if __name__ == "__main__":
    create_headerfiles("C:/GlobalCube/System/OPTIMA/Export")