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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _log10_Inorm_extern_atmx(self, Teff, logg, abun):
 """ Internal function to compute normal passband intensities using the external WD machinery that employs model atmospheres and ramps. @Teff: effective temperature in K @logg: surface gravity in cgs @abun: metallicity in dex, Solar=0.0 Returns: log10(Inorm) """


        log10_Inorm = libphoebe.wd_atmint(Teff, logg, abun, self.extern_wd_idx, self.wd_data["planck_table"], self.wd_data["atm_table"])

        return log10_Inorm