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Python cmath.isnan方法代碼示例

本文整理匯總了Python中cmath.isnan方法的典型用法代碼示例。如果您正苦於以下問題：Python cmath.isnan方法的具體用法？Python cmath.isnan怎麽用？Python cmath.isnan使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類cmath的用法示例。


在下文中一共展示了cmath.isnan方法的5個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。

示例1: assertFloatIdentical

# 需要導入模塊: import cmath [as 別名]
# 或者: from cmath import isnan [as 別名]
def assertFloatIdentical(self, x, y):
        """Fail unless floats x and y are identical, in the sense that:
        (1) both x and y are nans, or
        (2) both x and y are infinities, with the same sign, or
        (3) both x and y are zeros, with the same sign, or
        (4) x and y are both finite and nonzero, and x == y

        """
        msg = 'floats {!r} and {!r} are not identical'

        if math.isnan(x) or math.isnan(y):
            if math.isnan(x) and math.isnan(y):
                return
        elif x == y:
            if x != 0.0:
                return
            # both zero; check that signs match
            elif math.copysign(1.0, x) == math.copysign(1.0, y):
                return
            else:
                msg += ': zeros have different signs'
        self.fail(msg.format(x, y))
開發者ID:Microvellum，項目名稱:Fluid-Designer，代碼行數:24，代碼來源:test_cmath.py

示例2: test_abs

# 需要導入模塊: import cmath [as 別名]
# 或者: from cmath import isnan [as 別名]
def test_abs(self):
        # zeros
        for z in complex_zeros:
            self.assertEqual(abs(z), 0.0)

        # infinities
        for z in complex_infinities:
            self.assertEqual(abs(z), INF)

        # real or imaginary part NaN
        self.assertEqual(abs(complex(NAN, -INF)), INF)
        self.assertTrue(math.isnan(abs(complex(NAN, -2.3))))
        self.assertTrue(math.isnan(abs(complex(NAN, -0.0))))
        self.assertTrue(math.isnan(abs(complex(NAN, 0.0))))
        self.assertTrue(math.isnan(abs(complex(NAN, 2.3))))
        self.assertEqual(abs(complex(NAN, INF)), INF)
        self.assertEqual(abs(complex(-INF, NAN)), INF)
        self.assertTrue(math.isnan(abs(complex(-2.3, NAN))))
        self.assertTrue(math.isnan(abs(complex(-0.0, NAN))))
        self.assertTrue(math.isnan(abs(complex(0.0, NAN))))
        self.assertTrue(math.isnan(abs(complex(2.3, NAN))))
        self.assertEqual(abs(complex(INF, NAN)), INF)
        self.assertTrue(math.isnan(abs(complex(NAN, NAN))))
開發者ID:Microvellum，項目名稱:Fluid-Designer，代碼行數:25，代碼來源:test_cmath.py

示例3: test_phase

# 需要導入模塊: import cmath [as 別名]
# 或者: from cmath import isnan [as 別名]
def test_phase(self):
        self.assertAlmostEqual(phase(0), 0.)
        self.assertAlmostEqual(phase(1.), 0.)
        self.assertAlmostEqual(phase(-1.), pi)
        self.assertAlmostEqual(phase(-1.+1E-300j), pi)
        self.assertAlmostEqual(phase(-1.-1E-300j), -pi)
        self.assertAlmostEqual(phase(1j), pi/2)
        self.assertAlmostEqual(phase(-1j), -pi/2)

        # zeros
        self.assertEqual(phase(complex(0.0, 0.0)), 0.0)
        self.assertEqual(phase(complex(0.0, -0.0)), -0.0)
        self.assertEqual(phase(complex(-0.0, 0.0)), pi)
        self.assertEqual(phase(complex(-0.0, -0.0)), -pi)

        # infinities
        self.assertAlmostEqual(phase(complex(-INF, -0.0)), -pi)
        self.assertAlmostEqual(phase(complex(-INF, -2.3)), -pi)
        self.assertAlmostEqual(phase(complex(-INF, -INF)), -0.75*pi)
        self.assertAlmostEqual(phase(complex(-2.3, -INF)), -pi/2)
        self.assertAlmostEqual(phase(complex(-0.0, -INF)), -pi/2)
        self.assertAlmostEqual(phase(complex(0.0, -INF)), -pi/2)
        self.assertAlmostEqual(phase(complex(2.3, -INF)), -pi/2)
        self.assertAlmostEqual(phase(complex(INF, -INF)), -pi/4)
        self.assertEqual(phase(complex(INF, -2.3)), -0.0)
        self.assertEqual(phase(complex(INF, -0.0)), -0.0)
        self.assertEqual(phase(complex(INF, 0.0)), 0.0)
        self.assertEqual(phase(complex(INF, 2.3)), 0.0)
        self.assertAlmostEqual(phase(complex(INF, INF)), pi/4)
        self.assertAlmostEqual(phase(complex(2.3, INF)), pi/2)
        self.assertAlmostEqual(phase(complex(0.0, INF)), pi/2)
        self.assertAlmostEqual(phase(complex(-0.0, INF)), pi/2)
        self.assertAlmostEqual(phase(complex(-2.3, INF)), pi/2)
        self.assertAlmostEqual(phase(complex(-INF, INF)), 0.75*pi)
        self.assertAlmostEqual(phase(complex(-INF, 2.3)), pi)
        self.assertAlmostEqual(phase(complex(-INF, 0.0)), pi)

        # real or imaginary part NaN
        for z in complex_nans:
            self.assertTrue(math.isnan(phase(z)))
開發者ID:IronLanguages，項目名稱:ironpython2，代碼行數:42，代碼來源:test_cmath.py

示例4: test_abs

# 需要導入模塊: import cmath [as 別名]
# 或者: from cmath import isnan [as 別名]
def test_abs(self):
        # zeros
        for z in complex_zeros:
            self.assertEqual(abs(z), 0.0)

        # infinities
        for z in complex_infinities:
            self.assertEqual(abs(z), INF)

        # real or imaginary part NaN
        self.assertEqual(abs(complex(NAN, -INF)), INF)
        self.assertTrue(math.isnan(abs(complex(NAN, -2.3))))
        self.assertTrue(math.isnan(abs(complex(NAN, -0.0))))
        self.assertTrue(math.isnan(abs(complex(NAN, 0.0))))
        self.assertTrue(math.isnan(abs(complex(NAN, 2.3))))
        self.assertEqual(abs(complex(NAN, INF)), INF)
        self.assertEqual(abs(complex(-INF, NAN)), INF)
        self.assertTrue(math.isnan(abs(complex(-2.3, NAN))))
        self.assertTrue(math.isnan(abs(complex(-0.0, NAN))))
        self.assertTrue(math.isnan(abs(complex(0.0, NAN))))
        self.assertTrue(math.isnan(abs(complex(2.3, NAN))))
        self.assertEqual(abs(complex(INF, NAN)), INF)
        self.assertTrue(math.isnan(abs(complex(NAN, NAN))))

        # result overflows
        if float.__getformat__("double").startswith("IEEE"):
            self.assertRaises(OverflowError, abs, complex(1.4e308, 1.4e308))
開發者ID:IronLanguages，項目名稱:ironpython2，代碼行數:29，代碼來源:test_cmath.py

示例5: test_isnan

# 需要導入模塊: import cmath [as 別名]
# 或者: from cmath import isnan [as 別名]
def test_isnan(self):
        self.assertFalse(cmath.isnan(1))
        self.assertFalse(cmath.isnan(1j))
        self.assertFalse(cmath.isnan(INF))
        self.assertTrue(cmath.isnan(NAN))
        self.assertTrue(cmath.isnan(complex(NAN, 0)))
        self.assertTrue(cmath.isnan(complex(0, NAN)))
        self.assertTrue(cmath.isnan(complex(NAN, NAN)))
        self.assertTrue(cmath.isnan(complex(NAN, INF)))
        self.assertTrue(cmath.isnan(complex(INF, NAN)))
開發者ID:IronLanguages，項目名稱:ironpython2，代碼行數:12，代碼來源:test_cmath.py


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