def save_or_show_heatmap(plt, show=True, file_name=''):
    """Function shows the heatmap or saves it

    Function shows the kmeRs heatmap or saves it
    into the file

    Args:
        plt (str): pyplot returns from kmeRs_heatmap()
        show (bool): if True the plot will be show
        file_name (str): full or abstract file path
            and file name where the plot should be saved

    Returns:
        bool: True if successful
    """
    try:
        if show is True:
            plt.savefig(file_name)
        if show is False:
            plt.show()
        return True
    except:
        return False
