def test_leitura_campo_num_decimal(self):
        self.assertEqual(self.seg_p.valor_titulo, Decimal('100.00'))
def idq_psiq(id, iq, psiq, ax=0):
    """creates a surface plot of psiq vs id, iq"""
    if ax == 0:
        _create_3d_axis()
        ax = plt.gca()
    _plot_surface(ax, id, iq, psiq,
                  (u'Id/A', u'Iq/A', u'Psi q/Vs'),
                  azim=210)