Create Polarization object from list of Outcars and Structures in order
        of nonpolar to polar.

        Note, we recommend calculating the ionic dipole moment using calc_ionic
        than using the values in Outcar (see module comments). To do this set
        calc_ionic_from_zval = True

def from_outcars_and_structures(cls, outcars, structures,
                                    calc_ionic_from_zval=False):
        """
        Create Polarization object from list of Outcars and Structures in order
        of nonpolar to polar.

        Note, we recommend calculating the ionic dipole moment using calc_ionic
        than using the values in Outcar (see module comments). To do this set
        calc_ionic_from_zval = True
        """
        p_elecs = []
        p_ions = []

        for i, o in enumerate(outcars):
            p_elecs.append(o.p_elec)
            if calc_ionic_from_zval:
                p_ions.append(
                    get_total_ionic_dipole(structures[i], o.zval_dict))
            else:
                p_ions.append(o.p_ion)
        return cls(p_elecs, p_ions, structures)