def test_ufunc_out(self):
from _numpypy import array, negative, zeros, sin
from math import sin as msin
a = array([[1, 2], [3, 4]])
c = zeros((2, 2, 2))
b = negative(a + a, out=c[1])
#test for view, and also test that forcing out also forces b
assert (c[:, :, 1] == [[0, 0], [-4, -8]]).all()
assert (b == [[-2, -4], [-6, -8]]).all()
#Test broadcast, type promotion
b = negative(3, out=a)
assert (a == -3).all()
c = zeros((2, 2), dtype=float)
b = negative(3, out=c)
assert b.dtype.kind == c.dtype.kind
assert b.shape == c.shape
a = array([1, 2])
b = sin(a, out=c)
assert (c == [[msin(1), msin(2)]] * 2).all()
b = sin(a, out=c + c)
assert (c == b).all()
#Test shape agreement
a = zeros((3, 4))
b = zeros((3, 5))
raises(ValueError, 'negative(a, out=b)')
b = zeros((1, 4))
raises(ValueError, 'negative(a, out=b)')
def test_ufunc_cast(self):
from _numpypy import array, negative, add, sum
a = array(16, dtype=int)
c = array(0, dtype=float)
b = negative(a, out=c)
assert b == c
b = add(a, a, out=c)
assert b == c
d = array([16, 16], dtype=int)
b = sum(d, out=c)
assert b == c
try:
from _numpypy import version
v = version.version.split('.')
except:
v = ['1', '6', '0'] # numpypy is api compatable to what version?
if v[0] < '2':
b = negative(c, out=a)
assert b == a
b = add(c, c, out=a)
assert b == a
b = sum(array([16, 16], dtype=float), out=a)
assert b == a
else:
cast_error = raises(TypeError, negative, c, a)
assert str(cast_error.value) == \
"Cannot cast ufunc negative output from dtype('float64') to dtype('int64') with casting rule 'same_kind'"
def test_ufunc_cast(self):
from _numpypy import array, negative, add, sum
a = array(16, dtype = int)
c = array(0, dtype = float)
b = negative(a, out=c)
assert b == c
b = add(a, a, out=c)
assert b == c
d = array([16, 16], dtype=int)
b = sum(d, out=c)
assert b == c
try:
from _numpypy import version
v = version.version.split('.')
except:
v = ['1', '6', '0'] # numpypy is api compatable to what version?
if v[0]<'2':
b = negative(c, out=a)
assert b == a
b = add(c, c, out=a)
assert b == a
b = sum(array([16, 16], dtype=float), out=a)
assert b == a
else:
cast_error = raises(TypeError, negative, c, a)
assert str(cast_error.value) == \
"Cannot cast ufunc negative output from dtype('float64') to dtype('int64') with casting rule 'same_kind'"
def test_ufunc_out(self):
from _numpypy import array, negative, zeros, sin
from math import sin as msin
a = array([[1, 2], [3, 4]])
c = zeros((2,2,2))
b = negative(a + a, out=c[1])
#test for view, and also test that forcing out also forces b
assert (c[:, :, 1] == [[0, 0], [-4, -8]]).all()
assert (b == [[-2, -4], [-6, -8]]).all()
#Test broadcast, type promotion
b = negative(3, out=a)
assert (a == -3).all()
c = zeros((2, 2), dtype=float)
b = negative(3, out=c)
assert b.dtype.kind == c.dtype.kind
assert b.shape == c.shape
a = array([1, 2])
b = sin(a, out=c)
assert(c == [[msin(1), msin(2)]] * 2).all()
b = sin(a, out=c+c)
assert (c == b).all()
#Test shape agreement
a = zeros((3,4))
b = zeros((3,5))
raises(ValueError, 'negative(a, out=b)')
b = zeros((1,4))
raises(ValueError, 'negative(a, out=b)')
def test_negative(self):
from _numpypy import array, negative
a = array([-5.0, 0.0, 1.0])
b = negative(a)
for i in range(3):
assert b[i] == -a[i]
a = array([-5.0, 1.0])
b = negative(a)
a[0] = 5.0
assert b[0] == 5.0
a = array(range(30))
assert negative(a + a)[3] == -6
def test_negative(self):
from _numpypy import array, negative
a = array([-5.0, 0.0, 1.0])
b = negative(a)
for i in range(3):
assert b[i] == -a[i]
a = array([-5.0, 1.0])
b = negative(a)
a[0] = 5.0
assert b[0] == 5.0
a = array(range(30))
assert negative(a + a)[3] == -6
def test_sequence(self):
from _numpypy import array, ndarray, negative, minimum
a = array(range(3))
b = [2.0, 1.0, 0.0]
c = 1.0
b_neg = negative(b)
assert isinstance(b_neg, ndarray)
for i in range(3):
assert b_neg[i] == -b[i]
min_a_b = minimum(a, b)
assert isinstance(min_a_b, ndarray)
for i in range(3):
assert min_a_b[i] == min(a[i], b[i])
min_b_a = minimum(b, a)
assert isinstance(min_b_a, ndarray)
for i in range(3):
assert min_b_a[i] == min(a[i], b[i])
min_a_c = minimum(a, c)
assert isinstance(min_a_c, ndarray)
for i in range(3):
assert min_a_c[i] == min(a[i], c)
min_c_a = minimum(c, a)
assert isinstance(min_c_a, ndarray)
for i in range(3):
assert min_c_a[i] == min(a[i], c)
min_b_c = minimum(b, c)
assert isinstance(min_b_c, ndarray)
for i in range(3):
assert min_b_c[i] == min(b[i], c)
min_c_b = minimum(c, b)
assert isinstance(min_c_b, ndarray)
for i in range(3):
assert min_c_b[i] == min(b[i], c)
def test_sequence(self):
from _numpypy import array, ndarray, negative, minimum
a = array(range(3))
b = [2.0, 1.0, 0.0]
c = 1.0
b_neg = negative(b)
assert isinstance(b_neg, ndarray)
for i in range(3):
assert b_neg[i] == -b[i]
min_a_b = minimum(a, b)
assert isinstance(min_a_b, ndarray)
for i in range(3):
assert min_a_b[i] == min(a[i], b[i])
min_b_a = minimum(b, a)
assert isinstance(min_b_a, ndarray)
for i in range(3):
assert min_b_a[i] == min(a[i], b[i])
min_a_c = minimum(a, c)
assert isinstance(min_a_c, ndarray)
for i in range(3):
assert min_a_c[i] == min(a[i], c)
min_c_a = minimum(c, a)
assert isinstance(min_c_a, ndarray)
for i in range(3):
assert min_c_a[i] == min(a[i], c)
min_b_c = minimum(b, c)
assert isinstance(min_b_c, ndarray)
for i in range(3):
assert min_b_c[i] == min(b[i], c)
min_c_b = minimum(c, b)
assert isinstance(min_c_b, ndarray)
for i in range(3):
assert min_c_b[i] == min(b[i], c)
def test_single_item(self):
from _numpypy import negative, sign, minimum
assert negative(5.0) == -5.0
assert sign(-0.0) == 0.0
assert minimum(2.0, 3.0) == 2.0
def test_single_item(self):
from _numpypy import negative, sign, minimum
assert negative(5.0) == -5.0
assert sign(-0.0) == 0.0
assert minimum(2.0, 3.0) == 2.0
def test_ufunc_negative(self):
from _numpypy import array, negative
a = array([[1, 2], [3, 4]])
b = negative(a + a)
assert (b == [[-2, -4], [-6, -8]]).all()
def test_ufunc_negative(self):
from _numpypy import array, negative
a = array([[1, 2], [3, 4]])
b = negative(a + a)
assert (b == [[-2, -4], [-6, -8]]).all()