def __str__(self):
    'return string representation of the object'
    description = ('Dispersion solution for Beam ' + str(self.ident))
    rstring = super(ConfigDisp, self).str_header(description)
    rstring += super(ConfigDisp, self).__str__()
    return rstring
return string representation of the object
def __str__(self):
    
    description = ('Dispersion solution for Beam ' + str(self.ident))
    rstring = super(ConfigDisp, self).str_header(description)
    rstring += super(ConfigDisp, self).__str__()
    return rstring