How to use the specutils.analysis.fwhm function in specutils

"""

    try:
        cent = centroid(spectrum, region=None) # we may want to adjust this for continuum subtraction
    except Exception as e:
        logging.debug(e)
        cent = "Error"

    try:
        snr_val = snr(spectrum)
    except Exception as e:
        logging.debug(e)
        snr_val = "N/A"

    try:
        fwhm_val = fwhm(spectrum)
    except Exception as e:
        logging.debug(e)
        fwhm_val = "Error"

    try:
        ew = equivalent_width(spectrum)
    except Exception as e:
        logging.debug(e)
        ew = "Error"

    try:
        total = line_flux(spectrum)
    except Exception as e:
        logging.debug(e)
        total = "Error"

        'fwhm_L': lambda s: fwhm(s) / np.sqrt(2),
        'fwhm_G': lambda s: fwhm(s) / np.sqrt(2)