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bpo-41974: Remove complex.__float__, complex.__floordiv__, etc (GH-22593)

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Remove complex special methods __int__, __float__, __floordiv__,
__mod__, __divmod__, __rfloordiv__, __rmod__ and __rdivmod__
which always raised a TypeError.
This commit is contained in:
Serhiy Storchaka 2020-10-09 14:14:37 +03:00 • committed by GitHub
parent 48f305fd12
commit e2ec0b27c0
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GPG key ID: 4AEE18F83AFDEB23
8 changed files with 81 additions and 66 deletions
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62
Lib/test/test_complex.py
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@ -11,6 +11,14 @@ INF = float("inf")
NAN = float("nan")
# These tests ensure that complex math does the right thing
ZERO_DIVISION = (
(1+1j, 0+0j),
(1+1j, 0.0),
(1+1j, 0),
(1.0, 0+0j),
(1, 0+0j),
)
class ComplexTest(unittest.TestCase):
def assertAlmostEqual(self, a, b):
@ -99,20 +107,34 @@ class ComplexTest(unittest.TestCase):
self.check_div(complex(random(), random()),
complex(random(), random()))
self.assertRaises(ZeroDivisionError, complex.__truediv__, 1+1j, 0+0j)
self.assertRaises(OverflowError, pow, 1e200+1j, 1e200+1j)
self.assertAlmostEqual(complex.__truediv__(2+0j, 1+1j), 1-1j)
self.assertRaises(ZeroDivisionError, complex.__truediv__, 1+1j, 0+0j)
for denom_real, denom_imag in [(0, NAN), (NAN, 0), (NAN, NAN)]:
z = complex(0, 0) / complex(denom_real, denom_imag)
self.assertTrue(isnan(z.real))
self.assertTrue(isnan(z.imag))
def test_truediv_zero_division(self):
for a, b in ZERO_DIVISION:
with self.assertRaises(ZeroDivisionError):
a / b
def test_floordiv(self):
self.assertRaises(TypeError, complex.__floordiv__, 3+0j, 1.5+0j)
self.assertRaises(TypeError, complex.__floordiv__, 3+0j, 0+0j)
with self.assertRaises(TypeError):
(1+1j) // (1+0j)
with self.assertRaises(TypeError):
(1+1j) // 1.0
with self.assertRaises(TypeError):
(1+1j) // 1
with self.assertRaises(TypeError):
1.0 // (1+0j)
with self.assertRaises(TypeError):
1 // (1+0j)
def test_floordiv_zero_division(self):
for a, b in ZERO_DIVISION:
with self.assertRaises(TypeError):
a // b
def test_richcompare(self):
self.assertIs(complex.__eq__(1+1j, 1<<10000), False)
@ -159,13 +181,32 @@ class ComplexTest(unittest.TestCase):
def test_mod(self):
# % is no longer supported on complex numbers
self.assertRaises(TypeError, (1+1j).__mod__, 0+0j)
self.assertRaises(TypeError, lambda: (3.33+4.43j) % 0)
self.assertRaises(TypeError, (1+1j).__mod__, 4.3j)
with self.assertRaises(TypeError):
(1+1j) % (1+0j)
with self.assertRaises(TypeError):
(1+1j) % 1.0
with self.assertRaises(TypeError):
(1+1j) % 1
with self.assertRaises(TypeError):
1.0 % (1+0j)
with self.assertRaises(TypeError):
1 % (1+0j)
def test_mod_zero_division(self):
for a, b in ZERO_DIVISION:
with self.assertRaises(TypeError):
a % b
def test_divmod(self):
self.assertRaises(TypeError, divmod, 1+1j, 1+0j)
self.assertRaises(TypeError, divmod, 1+1j, 0+0j)
self.assertRaises(TypeError, divmod, 1+1j, 1.0)
self.assertRaises(TypeError, divmod, 1+1j, 1)
self.assertRaises(TypeError, divmod, 1.0, 1+0j)
self.assertRaises(TypeError, divmod, 1, 1+0j)
def test_divmod_zero_division(self):
for a, b in ZERO_DIVISION:
self.assertRaises(TypeError, divmod, a, b)
def test_pow(self):
self.assertAlmostEqual(pow(1+1j, 0+0j), 1.0)
@ -174,6 +215,7 @@ class ComplexTest(unittest.TestCase):
self.assertAlmostEqual(pow(1j, -1), 1/1j)
self.assertAlmostEqual(pow(1j, 200), 1)
self.assertRaises(ValueError, pow, 1+1j, 1+1j, 1+1j)
self.assertRaises(OverflowError, pow, 1e200+1j, 1e200+1j)
a = 3.33+4.43j
self.assertEqual(a ** 0j, 1)