Returns a dictionary with the abinit variables

def to_abivars(self):
        """Returns a dictionary with the abinit variables"""
        return {
                # Spectral function
                "nomegasf": self.nomegasf,
                "domegasf": self.domegasf,
                "spmeth"  : self.spmeth,
                 # Frequency mesh for the polarizability
                "nfreqre"  : self.nfreqre,
                "freqremax": self.freqremax,
                "nfreqim"  : self.nfreqim,
                "freqremin": self.freqremin,
                }