import time


def create_time_string(time_format='%Y%m%d%H%M%S'):
    """Returns current time formatted as `time_format`

    Parameters
    ----------
    time_format : str
        Refer https://docs.python.org/3/library/time.html#time.strftime for options

    Returns
    -------
    str
        time as string in requested format
    """
    return time.strftime(time_format)