def test_RandomStream():
srng = RandomStream(seed=123)
out = srng.normal() - srng.normal()
fn = function([], out, mode=jax_mode)
jax_res_1 = fn()
jax_res_2 = fn()
assert np.array_equal(jax_res_1, jax_res_2)
def test_tutorial(self):
srng = RandomStream(seed=234)
rv_u = srng.uniform(0, 1, size=(2, 2))
rv_n = srng.normal(0, 1, size=(2, 2))
f = function([], rv_u)
# Disabling `default_updates` means that we have to pass
# `srng.state_updates` to `function` manually, if we want the shared
# state to change
g = function([], rv_n, no_default_updates=True)
nearly_zeros = function([], rv_u + rv_u - 2 * rv_u)
assert np.all(f() != f())
assert np.all(g() == g())
assert np.all(abs(nearly_zeros()) < 1e-5)
def test_seed(self):
init_seed = 234
random = RandomStream(init_seed)
ref_state = np.random.RandomState(init_seed).get_state()
random_state = random.gen_seedgen.get_state()
assert random.default_instance_seed == init_seed
assert np.array_equal(random_state[1], ref_state[1])
assert random_state[0] == ref_state[0]
assert random_state[2:] == ref_state[2:]
new_seed = 43298
random.seed(new_seed)
ref_state = np.random.RandomState(new_seed).get_state()
random_state = random.gen_seedgen.get_state()
assert np.array_equal(random_state[1], ref_state[1])
assert random_state[0] == ref_state[0]
assert random_state[2:] == ref_state[2:]
random.seed()
ref_state = np.random.RandomState(init_seed).get_state()
random_state = random.gen_seedgen.get_state()
assert random.default_instance_seed == init_seed
assert np.array_equal(random_state[1], ref_state[1])
assert random_state[0] == ref_state[0]
assert random_state[2:] == ref_state[2:]
# Reset the seed
random.seed(new_seed)
# Check state updates
_ = random.normal()
# Now, change the seed when there are state updates
random.seed(new_seed)
rng = np.random.RandomState(new_seed)
update_seed = rng.randint(2**30)
ref_state = np.random.RandomState(update_seed).get_state()
random_state = random.state_updates[0][0].get_value(
borrow=True).get_state()
assert np.array_equal(random_state[1], ref_state[1])
assert random_state[0] == ref_state[0]
assert random_state[2:] == ref_state[2:]
def test_seed(self, rng_ctor):
init_seed = 234
random = RandomStream(init_seed, rng_ctor=rng_ctor)
assert random.default_instance_seed == init_seed
new_seed = 43298
random.seed(new_seed)
rng_seed = np.random.SeedSequence(new_seed)
assert random.gen_seedgen.entropy == rng_seed.entropy
random.seed()
rng_seed = np.random.SeedSequence(init_seed)
assert random.gen_seedgen.entropy == rng_seed.entropy
# Reset the seed
random.seed(new_seed)
# Check state updates
_ = random.normal()
# Now, change the seed when there are state updates
random.seed(new_seed)
update_seed = np.random.SeedSequence(new_seed)
(update_seed, ) = update_seed.spawn(1)
ref_rng = random.rng_ctor(update_seed)
state_rng = random.state_updates[0][0].get_value(borrow=True)
if hasattr(state_rng, "get_state"):
ref_state = ref_rng.get_state()
random_state = state_rng.get_state()
assert np.array_equal(random_state[1], ref_state[1])
assert random_state[0] == ref_state[0]
assert random_state[2:] == ref_state[2:]
else:
ref_state = ref_rng.__getstate__()
random_state = state_rng.__getstate__()
assert random_state["bit_generator"] == ref_state["bit_generator"]
assert random_state["state"] == ref_state["state"]
def test_normal0():
steps = 50
std = 2.0
if (config.mode in ("DEBUG_MODE", "DebugMode", "FAST_COMPILE")
or config.mode == "Mode" and config.linker in ["py"]):
sample_size = (25, 30)
default_rtol = 0.02
else:
sample_size = (999, 50)
default_rtol = 0.01
sample_size_odd = (sample_size[0], sample_size[1] - 1)
x = matrix()
test_cases = [
(sample_size, sample_size, [], [], -5.0, default_rtol, default_rtol),
(
x.shape,
sample_size,
[x],
[np.zeros(sample_size, dtype=config.floatX)],
-5.0,
default_rtol,
default_rtol,
),
# test odd value
(
x.shape,
sample_size_odd,
[x],
[np.zeros(sample_size_odd, dtype=config.floatX)],
-5.0,
default_rtol,
default_rtol,
),
(
sample_size,
sample_size,
[],
[],
np.arange(np.prod(sample_size),
dtype="float32").reshape(sample_size),
10.0 * std / np.sqrt(steps),
default_rtol,
),
# test empty size (scalar)
((), (), [], [], -5.0, default_rtol, 0.02),
# test with few samples at the same time
((1, ), (1, ), [], [], -5.0, default_rtol, 0.02),
((3, ), (3, ), [], [], -5.0, default_rtol, 0.02),
]
for size, const_size, var_input, input, avg, rtol, std_tol in test_cases:
R = MRG_RandomStream(234)
# Note: we specify `nstreams` to avoid a warning.
n = R.normal(
size=size,
avg=avg,
std=std,
nstreams=rng_mrg.guess_n_streams(size, warn=False),
)
f = function(var_input, n)
f(*input)
# Increase the number of steps if size implies only a few samples
if np.prod(const_size) < 10:
steps_ = steps * 50
else:
steps_ = steps
check_basics(
f,
steps_,
const_size,
target_avg=avg,
target_std=std,
prefix="mrg ",
allow_01=True,
inputs=input,
mean_rtol=rtol,
std_tol=std_tol,
)
sys.stdout.flush()
RR = RandomStream(235)
nn = RR.normal(avg, std, size=size)
ff = function(var_input, nn)
check_basics(
ff,
steps_,
const_size,
target_avg=avg,
target_std=std,
prefix="numpy ",
allow_01=True,
inputs=input,
mean_rtol=rtol,
)
