test_quantity.py 文件源码

def test_quantity_abs_round(self):

        x = self.Q_(-4.2, 'meter')
        y = self.Q_(4.2, 'meter')
        # In Python 3+ round of x is delegated to x.__round__, instead of round(x.__float__)
        # and therefore it can be properly implemented by Pint
        for fun in (abs, op.pos, op.neg) + (round, ) if PYTHON3 else ():
            zx = self.Q_(fun(x.magnitude), 'meter')
            zy = self.Q_(fun(y.magnitude), 'meter')
            rx = fun(x)
            ry = fun(y)
            self.assertEqual(rx, zx, 'while testing {0}'.format(fun))
            self.assertEqual(ry, zy, 'while testing {0}'.format(fun))
            self.assertIsNot(rx, zx, 'while testing {0}'.format(fun))
            self.assertIsNot(ry, zy, 'while testing {0}'.format(fun))