def METHOD_NAME(block_size, design_snr, mu):
    path = default_dir()
    filename = generate_filename(block_size, design_snr, mu)
    full_file = path + filename
    import os
    if not os.path.isfile(full_file):
        z_params = tal_vardy_tpm_algorithm(block_size, design_snr, mu)
        save_z_parameters(z_params, block_size, design_snr, mu)
    z_params = np.loadtxt(full_file)
    return z_params