start cleanup of the slowest tests (#16339)

This commit is contained in:
Christopher Milan
2026-05-22 15:39:36 -07:00
committed by GitHub
parent 26b3b3f6a2
commit 451f38155c
3 changed files with 198 additions and 193 deletions

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@@ -3349,6 +3349,7 @@ class TestOps(unittest.TestCase):
# fill_value must not alter output dtype
self.assertEqual(Tensor([1.0, 2.0]).masked_select(Tensor([True, False]), size=3, fill_value=-1).dtype, dtypes.default_float)
@slow_test
def test_nonzero(self):
helper_test_op([(32, 10)], lambda x: (x>0.5).nonzero().int(), lambda x: (x>0.5).nonzero(), forward_only=True)
helper_test_op([(20,)], lambda x: (x>0.5).nonzero().int(), lambda x: (x>0.5).nonzero(), forward_only=True)

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@@ -1,8 +1,7 @@
import unittest, math
from functools import partial
from tinygrad import nn, dtypes, Tensor, Device, TinyJit, Variable
from tinygrad.helpers import getenv, OSX
from tinygrad import dtypes, Tensor, Device
from tinygrad.helpers import getenv
from tinygrad.codegen import to_program
from tinygrad.uop.ops import Ops
@@ -10,6 +9,7 @@ from tinygrad.renderer.ptx import PTXRenderer
from tinygrad.renderer.nir import NIRRenderer
from tinygrad.renderer.isa.x86 import X86Renderer
from test.helpers import not_support_multi_device, needs_second_gpu, CI
from test.unit.test_randomness import equal_distribution, normal_test
import numpy as np
import torch
@@ -18,54 +18,6 @@ from hypothesis import given, settings, strategies as strat
settings.register_profile("my_profile", max_examples=200, deadline=None, derandomize=getenv("DERANDOMIZE_CI", False))
settings.load_profile("my_profile")
# https://gist.github.com/devries/11405101
def ksprob(a):
fac, total, termbf = 2.0, 0.0, 0.0
a2 = -2.0 * a * a
for j in range(1, 101):
term = fac * math.exp(a2 * j * j)
total += term
if math.fabs(term) <= 0.001 * termbf or math.fabs(term) <= 1e-8 * total:
return total
fac = -fac
termbf = math.fabs(term)
return 1.0
def kstest(l1, l2):
n1, n2 = len(l1), len(l2)
l1.sort()
l2.sort()
j1, j2, d, fn1, fn2 = 0, 0, 0.0, 0.0, 0.0
while j1 < n1 and j2 < n2:
d1, d2 = l1[j1], l2[j2]
if d1 <= d2:
fn1 = (float(j1) + 1.0) / float(n1)
j1 += 1
if d2 <= d1:
fn2 = (float(j2) + 1.0) / float(n2)
j2 += 1
dtemp = math.fabs(fn2 - fn1)
if dtemp > d:
d = dtemp
ne = float(n1 * n2) / float(n1 + n2)
nesq = math.sqrt(ne)
prob = ksprob((nesq + 0.12 + 0.11 / nesq) * d)
return prob
def equal_distribution(tiny_func, torch_func=None, numpy_func=None, shape=(40, 43), alpha=0.04):
Tensor.manual_seed(1337)
torch.manual_seed(1337)
np.random.seed(1337)
assert not (torch_func is None and numpy_func is None), "no function to compare with"
x1 = tiny_func(*shape).numpy().flatten()
x2 = tiny_func(shape).numpy().flatten()
if numpy_func is not None: y = numpy_func(shape).flatten()
if torch_func is not None: z = torch_func(shape).numpy().flatten()
return (numpy_func is None or (kstest(x1, y) >= alpha and kstest(x2, y) >= alpha)) and \
(torch_func is None or (kstest(x1, z) >= alpha and kstest(x2, z) >= alpha))
def normal_test(func, shape=(20, 45), alpha=0.05): return equal_distribution(func, numpy_func=lambda x: np.random.randn(*x), shape=shape, alpha=alpha)
class TestRandomness(unittest.TestCase):
def test_rand(self):
self.assertFalse(normal_test(Tensor.rand))
@@ -274,11 +226,6 @@ class TestRandomness(unittest.TestCase):
assert rand.dtype == dtypes.float16
assert rand.device == empty.device
def test_randn(self):
self.assertEqual(Tensor.randn(3,3,dtype=dtypes.half).dtype, dtypes.half)
self.assertTrue(normal_test(Tensor.randn))
self.assertTrue(equal_distribution(Tensor.randn, torch.randn, lambda x: np.random.randn(*x)))
def test_randn_device(self):
self.assertEqual(Tensor.randn(3,3,device="CPU").device, "CPU")
@@ -296,128 +243,6 @@ class TestRandomness(unittest.TestCase):
assert math.isfinite(mn), mn
dtypes.default_float = old_default_float
def test_randint(self):
self.assertFalse(normal_test(Tensor.randint))
self.assertTrue(equal_distribution(partial(Tensor.randint, low=-2, high=5),
numpy_func=lambda x: np.random.randint(low=-2, high=5, size=x)))
self.assertTrue(equal_distribution(partial(Tensor.randint, low=-2, high=5, dtype="int32"),
numpy_func=lambda x: np.random.randint(low=-2, high=5, size=x)))
self.assertTrue(Tensor.randint(1, device="CPU").device=="CPU")
# check types of args
with self.assertRaises(TypeError): Tensor.randint((3, 4), low=0.1, high=3)
with self.assertRaises(TypeError): Tensor.randint((3, 4), low=0, high=3.5)
with self.assertRaises(TypeError): Tensor.randint((3, 4), low=1, high=3, dtype="float")
with self.assertRaises(TypeError): Tensor.randint((3, 4), low=0, high=3, dtype=dtypes.float32)
# check low < high
with self.assertRaises(ValueError): Tensor.randint((3, 4), low=10, high=5)
with self.assertRaises(ValueError): Tensor.randint((3, 4), low=10, high=10)
np.testing.assert_array_equal(Tensor.randint(16, low=5, high=6).numpy(), 5)
def test_normal(self):
self.assertTrue(normal_test(Tensor.normal))
self.assertTrue(equal_distribution(Tensor.normal, lambda x: torch.nn.init.normal_(torch.empty(x), mean=0, std=1),
lambda x: np.random.normal(loc=0, scale=1, size=x)))
# check std >= 0
with self.assertRaises(ValueError): Tensor.normal((3, 4), mean=0, std=-1)
def test_uniform(self):
self.assertFalse(normal_test(Tensor.uniform))
self.assertTrue(equal_distribution(Tensor.uniform, lambda x: torch.nn.init.uniform_(torch.empty(x)), lambda x: np.random.uniform(size=x)))
self.assertTrue(equal_distribution(partial(Tensor.uniform, low=-100, high=100, dtype=dtypes.int32),
numpy_func=lambda x: np.random.randint(low=-100, high=100, size=x)))
# check low < high
with self.assertRaises(ValueError): Tensor.uniform((3, 4), low=5.0, high=3.0)
with self.assertRaises(ValueError): Tensor.uniform((3, 4), low=1.0, high=1.0)
def test_scaled_uniform(self):
self.assertFalse(normal_test(Tensor.scaled_uniform))
self.assertTrue(equal_distribution(Tensor.scaled_uniform, lambda x: torch.nn.init.uniform_(torch.empty(x), a=-1, b=1) / math.sqrt(math.prod(x)),
lambda x: np.random.uniform(-1, 1, size=x) / math.sqrt(math.prod(x))))
def test_glorot_uniform(self):
self.assertFalse(normal_test(Tensor.glorot_uniform))
self.assertTrue(equal_distribution(Tensor.glorot_uniform, lambda x: torch.nn.init.xavier_uniform_(torch.empty(x)),
lambda x: np.random.uniform(-1, 1, size=x) * math.sqrt(6 / (x[0] + math.prod(x[1:])))))
def test_kaiming_uniform(self):
for shape in [(32, 16, 3, 3), (20, 44), (5, 15, 35)]:
self.assertTrue(equal_distribution(Tensor.kaiming_uniform, lambda x: torch.nn.init.kaiming_uniform_(torch.empty(x)), shape=shape))
def test_kaiming_normal(self):
for shape in [(32, 16, 3, 3), (20, 44), (3, 15, 35)]:
self.assertTrue(equal_distribution(Tensor.kaiming_normal, lambda x: torch.nn.init.kaiming_normal_(torch.empty(x)), shape=shape))
def test_multinomial(self):
self.assertRaises(AssertionError, lambda: Tensor(2).multinomial(1, replacement=False))
self.assertRaises(AssertionError, lambda: Tensor([1, 9]).multinomial(0, replacement=False))
def _check_with_torch(w, num_samples, replacement):
tiny_res = Tensor(w).multinomial(num_samples, replacement=replacement)
torch_res = torch.tensor(w).multinomial(num_samples, replacement=replacement)
self.assertEqual(tiny_res.shape, torch_res.shape)
if torch_res.ndim == 1:
tiny_res = tiny_res.unsqueeze(0)
torch_res = torch_res.unsqueeze(0)
for i in range(torch_res.shape[0]):
self.assertTrue(equal_distribution(lambda *_: tiny_res[i], lambda _: torch_res[i]))
_check_with_torch(w=[0.231, 0., 1., 0.5], num_samples=300, replacement=True)
_check_with_torch(w=[[0.2, 0.8]], num_samples=300, replacement=True) # 2D but only 1 row
_check_with_torch(w=[[0.453, 0., 1., 0.81], [0.1, 0.8, 0., 0.1]], num_samples=300, replacement=True)
# no-replacement
w = [0.1, 0.9]
self.assertRaises(AssertionError, lambda: Tensor(w).multinomial(100, replacement=False))
@TinyJit
def sample_one(): return Tensor(w).multinomial(1, replacement=False).realize()
tiny_samples = [sample_one().item() for _ in range(400)]
torch_samples = [torch.tensor(w).multinomial(1, replacement=False).item() for _ in range(400)]
self.assertTrue(equal_distribution(lambda *_: Tensor(tiny_samples), lambda _: torch.tensor(torch_samples)))
w = list(range(32))
s1 = Tensor(w).multinomial(5, replacement=False).numpy()
self.assertEqual(len(set(s1.tolist())), 5)
s2 = Tensor(w).multinomial(5, replacement=False).numpy()
self.assertFalse(np.array_equal(s1, s2))
full = Tensor(w).multinomial(len(w), replacement=False).numpy()
self.assertEqual(sorted(full.tolist()), w)
w = [0.1, 0.2, 0.3, 0.4]
@TinyJit
def sample_three(): return Tensor(w).multinomial(3, replacement=False).realize()
tiny_draws = np.array([sample_three().numpy() for _ in range(400)])
torch_draws = np.array([torch.tensor(w).multinomial(3, replacement=False).numpy() for _ in range(400)])
for pos in range(3):
self.assertTrue(equal_distribution(lambda *_: Tensor(tiny_draws[:, pos]), lambda _: torch.tensor(torch_draws[:, pos])))
@unittest.skip("this test is flaky")
def test_multinomial_counterexample(self):
tiny_res = Tensor([0.3, 0.6, 0.1]).multinomial(4000, replacement=True)
torch_res = torch.tensor([0.3, 0.6, 0.1]).multinomial(4000, replacement=True)
self.assertTrue(equal_distribution(lambda *_: tiny_res, lambda _: torch_res))
torch_res = torch.tensor([0.2, 0.7, 0.1]).multinomial(4000, replacement=True)
self.assertFalse(equal_distribution(lambda *_: tiny_res, lambda _: torch_res))
def test_conv2d_init(self):
params = (128, 256, (3,3))
assert equal_distribution(lambda *_: nn.Conv2d(*params).weight, lambda _: torch.nn.Conv2d(*params).weight.detach())
assert equal_distribution(lambda *_: nn.Conv2d(*params).bias, lambda _: torch.nn.Conv2d(*params).bias.detach())
def test_linear_init(self):
params = (64, 256)
assert equal_distribution(lambda *_: nn.Linear(*params).weight, lambda _: torch.nn.Linear(*params).weight.detach())
assert equal_distribution(lambda *_: nn.Linear(*params).bias, lambda _: torch.nn.Linear(*params).bias.detach())
def test_bn_init(self):
params = (64,)
assert equal_distribution(lambda *_: nn.BatchNorm2d(*params).weight, lambda _: torch.nn.BatchNorm2d(*params).weight.detach())
assert equal_distribution(lambda *_: nn.BatchNorm2d(*params).bias, lambda _: torch.nn.BatchNorm2d(*params).bias.detach())
def test_rand_chain(self):
# NOTE: this fails if property propagates deeper than stack limit
for _ in range(833): Tensor.rand(1)
Tensor.rand(1).schedule_linear()
def test_random_counter_overflow(self):
device = Device.DEFAULT
Tensor.manual_seed(1337)
@@ -433,20 +258,5 @@ class TestRandomness(unittest.TestCase):
c = Tensor._device_rng_counters[device].numpy()
np.testing.assert_allclose(c, [14, 1])
# TODO: still fails with MAX_KERNEL_BUFFERS
@unittest.skipIf(Device.DEFAULT == "WEBGPU" and not OSX, "WEBGPU Vulkan can only run kernels with up to 10 buffers")
class TestSample(unittest.TestCase):
def test_sample(self):
X = Tensor.rand(1000, 50).realize()
BS = 16
idxs = np.random.randint(0, X.shape[0], size=(BS))
# this uncovered a bug with arg sort order
batch = [Variable(f'idx{i}', 0, X.shape[0]-1).bind(s) for i,s in enumerate(idxs.tolist())]
x = Tensor.cat(*[X.shrink(((batch[i], batch[i]+1), None)) for i in range(BS)])
print(idxs)
ret = x.numpy()
base = X.numpy()[idxs]
np.testing.assert_equal(ret, base)
if __name__ == "__main__":
unittest.main()

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@@ -0,0 +1,194 @@
import unittest, math, torch
import numpy as np
from functools import partial
from tinygrad import nn, dtypes, Tensor, Device, TinyJit, Variable
from tinygrad.helpers import OSX
# https://gist.github.com/devries/11405101
def ksprob(a):
fac, total, termbf = 2.0, 0.0, 0.0
a2 = -2.0 * a * a
for j in range(1, 101):
term = fac * math.exp(a2 * j * j)
total += term
if math.fabs(term) <= 0.001 * termbf or math.fabs(term) <= 1e-8 * total:
return total
fac = -fac
termbf = math.fabs(term)
return 1.0
def kstest(l1, l2):
n1, n2 = len(l1), len(l2)
l1.sort()
l2.sort()
j1, j2, d, fn1, fn2 = 0, 0, 0.0, 0.0, 0.0
while j1 < n1 and j2 < n2:
d1, d2 = l1[j1], l2[j2]
if d1 <= d2:
fn1 = (float(j1) + 1.0) / float(n1)
j1 += 1
if d2 <= d1:
fn2 = (float(j2) + 1.0) / float(n2)
j2 += 1
dtemp = math.fabs(fn2 - fn1)
if dtemp > d:
d = dtemp
ne = float(n1 * n2) / float(n1 + n2)
nesq = math.sqrt(ne)
prob = ksprob((nesq + 0.12 + 0.11 / nesq) * d)
return prob
def equal_distribution(tiny_func, torch_func=None, numpy_func=None, shape=(40, 43), alpha=0.04):
Tensor.manual_seed(1337)
torch.manual_seed(1337)
np.random.seed(1337)
assert not (torch_func is None and numpy_func is None), "no function to compare with"
x1 = tiny_func(*shape).numpy().flatten()
x2 = tiny_func(shape).numpy().flatten()
if numpy_func is not None: y = numpy_func(shape).flatten()
if torch_func is not None: z = torch_func(shape).numpy().flatten()
return (numpy_func is None or (kstest(x1, y) >= alpha and kstest(x2, y) >= alpha)) and \
(torch_func is None or (kstest(x1, z) >= alpha and kstest(x2, z) >= alpha))
def normal_test(func, shape=(20, 45), alpha=0.05): return equal_distribution(func, numpy_func=lambda x: np.random.randn(*x), shape=shape, alpha=alpha)
class TestRandomness(unittest.TestCase):
def test_randn(self):
self.assertEqual(Tensor.randn(3,3,dtype=dtypes.half).dtype, dtypes.half)
self.assertTrue(normal_test(Tensor.randn))
self.assertTrue(equal_distribution(Tensor.randn, torch.randn, lambda x: np.random.randn(*x)))
def test_randint(self):
self.assertFalse(normal_test(Tensor.randint))
self.assertTrue(equal_distribution(partial(Tensor.randint, low=-2, high=5),
numpy_func=lambda x: np.random.randint(low=-2, high=5, size=x)))
self.assertTrue(equal_distribution(partial(Tensor.randint, low=-2, high=5, dtype="int32"),
numpy_func=lambda x: np.random.randint(low=-2, high=5, size=x)))
self.assertTrue(Tensor.randint(1, device="CPU").device=="CPU")
# check types of args
with self.assertRaises(TypeError): Tensor.randint((3, 4), low=0.1, high=3)
with self.assertRaises(TypeError): Tensor.randint((3, 4), low=0, high=3.5)
with self.assertRaises(TypeError): Tensor.randint((3, 4), low=1, high=3, dtype="float")
with self.assertRaises(TypeError): Tensor.randint((3, 4), low=0, high=3, dtype=dtypes.float32)
# check low < high
with self.assertRaises(ValueError): Tensor.randint((3, 4), low=10, high=5)
with self.assertRaises(ValueError): Tensor.randint((3, 4), low=10, high=10)
np.testing.assert_array_equal(Tensor.randint(16, low=5, high=6).numpy(), 5)
def test_normal(self):
self.assertTrue(normal_test(Tensor.normal))
self.assertTrue(equal_distribution(Tensor.normal, lambda x: torch.nn.init.normal_(torch.empty(x), mean=0, std=1),
lambda x: np.random.normal(loc=0, scale=1, size=x)))
# check std >= 0
with self.assertRaises(ValueError): Tensor.normal((3, 4), mean=0, std=-1)
def test_uniform(self):
self.assertFalse(normal_test(Tensor.uniform))
self.assertTrue(equal_distribution(Tensor.uniform, lambda x: torch.nn.init.uniform_(torch.empty(x)), lambda x: np.random.uniform(size=x)))
self.assertTrue(equal_distribution(partial(Tensor.uniform, low=-100, high=100, dtype=dtypes.int32),
numpy_func=lambda x: np.random.randint(low=-100, high=100, size=x)))
# check low < high
with self.assertRaises(ValueError): Tensor.uniform((3, 4), low=5.0, high=3.0)
with self.assertRaises(ValueError): Tensor.uniform((3, 4), low=1.0, high=1.0)
def test_scaled_uniform(self):
self.assertFalse(normal_test(Tensor.scaled_uniform))
self.assertTrue(equal_distribution(Tensor.scaled_uniform, lambda x: torch.nn.init.uniform_(torch.empty(x), a=-1, b=1) / math.sqrt(math.prod(x)),
lambda x: np.random.uniform(-1, 1, size=x) / math.sqrt(math.prod(x))))
def test_glorot_uniform(self):
self.assertFalse(normal_test(Tensor.glorot_uniform))
self.assertTrue(equal_distribution(Tensor.glorot_uniform, lambda x: torch.nn.init.xavier_uniform_(torch.empty(x)),
lambda x: np.random.uniform(-1, 1, size=x) * math.sqrt(6 / (x[0] + math.prod(x[1:])))))
def test_kaiming_uniform(self):
for shape in [(32, 16, 3, 3), (20, 44), (5, 15, 35)]:
self.assertTrue(equal_distribution(Tensor.kaiming_uniform, lambda x: torch.nn.init.kaiming_uniform_(torch.empty(x)), shape=shape))
def test_kaiming_normal(self):
for shape in [(32, 16, 3, 3), (20, 44), (3, 15, 35)]:
self.assertTrue(equal_distribution(Tensor.kaiming_normal, lambda x: torch.nn.init.kaiming_normal_(torch.empty(x)), shape=shape))
def test_multinomial(self):
self.assertRaises(AssertionError, lambda: Tensor(2).multinomial(1, replacement=False))
self.assertRaises(AssertionError, lambda: Tensor([1, 9]).multinomial(0, replacement=False))
def _check_with_torch(w, num_samples, replacement):
tiny_res = Tensor(w).multinomial(num_samples, replacement=replacement)
torch_res = torch.tensor(w).multinomial(num_samples, replacement=replacement)
self.assertEqual(tiny_res.shape, torch_res.shape)
if torch_res.ndim == 1:
tiny_res = tiny_res.unsqueeze(0)
torch_res = torch_res.unsqueeze(0)
for i in range(torch_res.shape[0]):
self.assertTrue(equal_distribution(lambda *_: tiny_res[i], lambda _: torch_res[i]))
_check_with_torch(w=[0.231, 0., 1., 0.5], num_samples=300, replacement=True)
_check_with_torch(w=[[0.2, 0.8]], num_samples=300, replacement=True) # 2D but only 1 row
_check_with_torch(w=[[0.453, 0., 1., 0.81], [0.1, 0.8, 0., 0.1]], num_samples=300, replacement=True)
# no-replacement
w = [0.1, 0.9]
self.assertRaises(AssertionError, lambda: Tensor(w).multinomial(100, replacement=False))
@TinyJit
def sample_one(): return Tensor(w).multinomial(1, replacement=False).realize()
tiny_samples = [sample_one().item() for _ in range(400)]
torch_samples = [torch.tensor(w).multinomial(1, replacement=False).item() for _ in range(400)]
self.assertTrue(equal_distribution(lambda *_: Tensor(tiny_samples), lambda _: torch.tensor(torch_samples)))
w = list(range(32))
s1 = Tensor(w).multinomial(5, replacement=False).numpy()
self.assertEqual(len(set(s1.tolist())), 5)
s2 = Tensor(w).multinomial(5, replacement=False).numpy()
self.assertFalse(np.array_equal(s1, s2))
full = Tensor(w).multinomial(len(w), replacement=False).numpy()
self.assertEqual(sorted(full.tolist()), w)
w = [0.1, 0.2, 0.3, 0.4]
@TinyJit
def sample_three(): return Tensor(w).multinomial(3, replacement=False).realize()
tiny_draws = np.array([sample_three().numpy() for _ in range(400)])
torch_draws = np.array([torch.tensor(w).multinomial(3, replacement=False).numpy() for _ in range(400)])
for pos in range(3):
self.assertTrue(equal_distribution(lambda *_: Tensor(tiny_draws[:, pos]), lambda _: torch.tensor(torch_draws[:, pos])))
@unittest.skip("this test is flaky")
def test_multinomial_counterexample(self):
tiny_res = Tensor([0.3, 0.6, 0.1]).multinomial(4000, replacement=True)
torch_res = torch.tensor([0.3, 0.6, 0.1]).multinomial(4000, replacement=True)
self.assertTrue(equal_distribution(lambda *_: tiny_res, lambda _: torch_res))
torch_res = torch.tensor([0.2, 0.7, 0.1]).multinomial(4000, replacement=True)
self.assertFalse(equal_distribution(lambda *_: tiny_res, lambda _: torch_res))
def test_conv2d_init(self):
params = (128, 256, (3,3))
assert equal_distribution(lambda *_: nn.Conv2d(*params).weight, lambda _: torch.nn.Conv2d(*params).weight.detach())
assert equal_distribution(lambda *_: nn.Conv2d(*params).bias, lambda _: torch.nn.Conv2d(*params).bias.detach())
def test_linear_init(self):
params = (64, 256)
assert equal_distribution(lambda *_: nn.Linear(*params).weight, lambda _: torch.nn.Linear(*params).weight.detach())
assert equal_distribution(lambda *_: nn.Linear(*params).bias, lambda _: torch.nn.Linear(*params).bias.detach())
def test_bn_init(self):
params = (64,)
assert equal_distribution(lambda *_: nn.BatchNorm2d(*params).weight, lambda _: torch.nn.BatchNorm2d(*params).weight.detach())
assert equal_distribution(lambda *_: nn.BatchNorm2d(*params).bias, lambda _: torch.nn.BatchNorm2d(*params).bias.detach())
# TODO: still fails with MAX_KERNEL_BUFFERS
@unittest.skipIf(Device.DEFAULT == "WEBGPU" and not OSX, "WEBGPU Vulkan can only run kernels with up to 10 buffers")
class TestSample(unittest.TestCase):
def test_sample(self):
X = Tensor.rand(1000, 50).realize()
BS = 16
idxs = np.random.randint(0, X.shape[0], size=(BS))
# this uncovered a bug with arg sort order
batch = [Variable(f'idx{i}', 0, X.shape[0]-1).bind(s) for i,s in enumerate(idxs.tolist())]
x = Tensor.cat(*[X.shrink(((batch[i], batch[i]+1), None)) for i in range(BS)])
print(idxs)
ret = x.numpy()
base = X.numpy()[idxs]
np.testing.assert_equal(ret, base)
if __name__ == "__main__":
unittest.main()