@listens_for(File, 'after_delete')
def del_file(mapper, connection, target):
    if target.path:
        try:
            os.remove(op.join(file_path, target.path))
        except __HOLE__:
            # Don't care if was not deleted because it does not exist
            pass
dataset/ETHPy150Open flask-admin/flask-admin/examples/forms/app.py/del_file