ndispers/media/crystals/_LBO_Newlight.py
def n_expr(self, pol):
        """ sympy expresssion, 
        dispersion formula for a given polarization """
        if pol == 'o':
            return self.n_o_expr()
        elif pol == 'e':
            return self.n_e_expr()
        else:
            raise ValueError("pol = '%s' must be 'o' or 'e'" % pol)
 sympy expresssion, 
        dispersion formula for a given polarization 
sympy expresssion,
dispersion formula for a given polarization
sympy expresssion dispersion formula for a given polarization
def n_expr(self, pol):
        if pol == 'o':
            return self.n_o_expr()
        elif pol == 'e':
            return self.n_e_expr()
        else:
            raise ValueError("pol = '%s' must be 'o' or 'e'" % pol)
def n_expr ( self , pol ) : if pol == 'o' : return self . n_o_expr ( ) elif pol == 'e' : return self . n_e_expr ( ) else : raise ValueError ( "pol = '%s' must be 'o' or 'e'" % pol )
sympy expresssion,
dispersion formula for a given polarization
sympy expresssion dispersion formula for a given polarization
""" sympy expresssion, 
        dispersion formula for a given polarization """
self
pol