def _progress_bar(count, total):
    """
    Get a simple one-line string representing a progress bar.
    Arguments:
        count (int): Current count. Starts at 0.
        total (int): Total count.
    Returns:
        pbar_string (str): The string progress bar.
    """
    bar_len = 60
    filled_len = int(round(bar_len * (count + 1) / float(total)))
    bar = '=' * filled_len + '-' * (bar_len - filled_len)
    return '[{}] {}/{}'.format(bar, count + 1, total)