def eigenvalue_band_properties(self):
        """
        Band properties from the eigenvalues as a tuple,
        (band gap, cbm, vbm, is_band_gap_direct).
        """
        vbm = -float("inf")
        vbm_kpoint = None
        cbm = float("inf")
        cbm_kpoint = None
        for spin, d in self.eigenvalues.items():
            for k, val in enumerate(d):
                for (eigenval, occu) in val:
                    if occu > self.occu_tol and eigenval > vbm:
                        vbm = eigenval
                        vbm_kpoint = k
                    elif occu <= self.occu_tol and eigenval < cbm:
                        cbm = eigenval
                        cbm_kpoint = k
        return max(cbm - vbm, 0), cbm, vbm, vbm_kpoint == cbm_kpoint
def eigenvalue_band_properties ( self ) : vbm = - float ( "inf" ) vbm_kpoint = None cbm = float ( "inf" ) cbm_kpoint = None for spin , d in self . eigenvalues . items ( ) : for k , val in enumerate ( d ) : for ( eigenval , occu ) in val : if occu > self . occu_tol and eigenval > vbm : vbm = eigenval vbm_kpoint = k elif occu <= self . occu_tol and eigenval < cbm : cbm = eigenval cbm_kpoint = k return max ( cbm - vbm , 0 ) , cbm , vbm , vbm_kpoint == cbm_kpoint
Band properties from the eigenvalues as a tuple,
        (band gap, cbm, vbm, is_band_gap_direct).