import os
import shutil

def remove_dirs_except_tar(root_dir):
    for item in os.listdir(root_dir):
        item_path = os.path.join(root_dir, item)
        if os.path.isdir(item_path):
            shutil.rmtree(item_path)
        elif item.endswith('.tar'):
            continue

if __name__ == "__main__":
    root_directory = '/media/data/CC3M/data/openimages_v7/openimages_v7_valid'
    remove_dirs_except_tar(root_directory)