def test_nested_basic_sanity():
"""
Some trivially nested functions started
throwing name errors, this test ensures we
don't suffer from the same problems in the
future.
Just using single_pass(value=half) worked
fine, the value() function was correctly
replaced with the half() function, however
single_pass(value=quarter) didn't work,
it threw a NameError.
"""
data = np.array([1, 2, 3], dtype='float32')
py_result = [half(x) for x in data]
expected_half = [0.5, 1.0, 1.5]
assert py_result == expected_half
result_half = single_pass(data, value=half)
assert np.allclose(expected_half, result_half)
expected_quarter = [0.25, 0.5, 0.75]
py_quarter = [quarter(x) for x in data]
assert py_quarter == expected_quarter
result = single_pass(data, value=quarter)
assert np.allclose(expected_quarter, result)
def test_basic_sanity_local_nested_func():
"""
If this test fails but the one above
succeeds, then the insertion of func
objects into the function copy's
`globals` is broken.
"""
data = np.arange(10) * 2
assert data[0] == 0
assert data[1] == 2
assert data[-1] == 18
def square(x):
return x * x
assert square(2) == 4
result = single_pass(data, value=square)
assert result[0] == 0
assert result[1] == 4
assert result[-1] == 324
assert square(2) == 4
assert square(3) == 9
def test_softplus_with_nan_and_inf():
data = np.array([np.nan, -np.inf, np.inf], dtype='float32')
result = single_pass(data, value=softplus)
assert np.isnan(result[0])
assert result[1] == 0.
assert result[2] == np.inf
def test_math_tanh_function_supported():
data = np.arange(0.1, 1.0, 0.1, dtype='float32')
result = single_pass(data, value=math.tanh)
assert result[0] == approx(0.099668)
assert result[1] == approx(0.19737533)
assert result[2] == approx(0.29131263)
assert sum(result) == approx(3.9521739)
def test_basic_sanity():
data = np.arange(-2, 2, dtype='float32')
result = single_pass(data, value=logistic)
assert result[0] == approx(0.11920292)
assert result[1] == approx(0.26894143)
assert result[2] == approx(0.5)
assert result[3] == approx(0.7310586)
def test_math_sin_function_supported():
data = np.pi * np.array([0.25, 0.5, 0.75], dtype='float32')
result = single_pass(data, value=math.sin)
half_sqrt2 = math.sqrt(2) / 2
assert result[0] == approx(half_sqrt2)
assert result[1] == approx(1.0)
assert result[2] == approx(half_sqrt2)
assert sum(result) == approx(2 * half_sqrt2 + 1)
def test_relu_basic_sanity():
data = np.arange(-2, 3, dtype='float32')
result = single_pass(data, value=relu)
assert result[0] == 0.
assert result[1] == 0.
assert result[2] == 0.
assert result[3] == 1.
assert result[4] == 2.
def test_softplus_basic_sanity():
data = np.array([-2, -1, 0, 1, 2], dtype='float32')
result = single_pass(data, value=softplus)
assert result[0] == approx(0.12692805)
assert result[1] == approx(0.31326166)
assert result[2] == approx(0.69314718)
assert result[3] == approx(1.31326163)
assert result[4] == approx(2.12692809)
def test_basic_sanity():
data = np.arange(10)
assert data[0] == 0
assert data[1] == 1
assert data[-1] == 9
no_kwargs = single_pass(data)
assert no_kwargs[0] == 0
assert no_kwargs[1] == 1
assert no_kwargs[-1] == 9
result = single_pass(data, value=twice)
assert result[0] == 0
assert result[1] == 2
assert result[-1] == 18
assert result.sum() == 90
assert result.sum() == sum(twice(data))
def test_multi_column_support():
"""
This still needs work - sum(x)/len(x) fails
with a NameError, and the default return value
is the same shape as input - ie, no reduction
takes place.
"""
data = np.array(range(10), dtype='float').reshape((5, 2))
# Calculate mean with pure numpy calls...
def mean(x):
return np.sum(x) / x.size
assert mean(data[0]) == 0.5
assert mean(data[4]) == 8.5
result = single_pass(data, value=mean)
# TODO : update internals to be able to
# reduce dimensions for reductions such as
# mean
assert result[0][0] == approx(0.5)
assert result[1][0] == approx(2.5)
assert result[2][0] == approx(4.5)
assert result[3][0] == approx(6.5)
assert result[4][0] == approx(8.5)
# len(x) works fine...
def mean_npy(x):
return np.sum(x) / len(x)
assert mean_npy(data[0]) == approx(0.5)
assert mean_npy(data[1]) == approx(2.5)
assert mean_npy(data[4]) == approx(8.5)
result_npy = single_pass(data, value=mean_npy)
assert result_npy[0][0] == approx(0.5)
assert result_npy[4][0] == approx(8.5)
def test_transform_func_calls_second_func():
# Default iteration with no transforms
data = np.array([1, 2, 3])
py_unit = [unit(x) for x in data]
assert py_unit == data.tolist()
default = single_pass(data)
# The default behaviour should not
# change the values in the data array
expected = np.array([1, 2, 3])
assert np.allclose(expected, default)
py_twice = [twice(x) for x in data]
assert py_twice == (data * 2).tolist()
# Now perform an iteration but change
# the function for one that doubles.
result = single_pass(data, value=twice)
# Replacing the default function for one
# that doubles the values.
expected = np.array([2, 4, 6])
assert np.allclose(expected, result)
def test_multiple_transforms_top_level():
"""
This tests for the 'free vars' issue -
we had failures when the value= kwarg
was decorated with @fs, but if you remove
the decorator it's fine.
"""
data = np.array([1, 2, 3])
py_result = [multi(x) for x in data]
assert py_result == [1, 64, 729]
result = single_pass(data, value=multi)
expected = np.array([1, 64, 729])
assert np.allclose(expected, result)
def test_nested_math_function_supported():
data = np.arange(10, dtype='float32')
assert data[0] == approx(0.0)
assert data[1] == approx(1.0)
def calc(x):
return 2 * math.log(x)
assert calc(0.5) == approx(-1.38629436)
# Assert ValueError for calling `log()`
# on zero.
# with raises(ValueError):
# _ = single_pass(data, value=calc)
result = single_pass(data[1:], value=calc)
assert result[0] == approx(0.0)
assert result[1] == approx(1.38629436)
assert result[2] == approx(2.19722462)
assert result.sum() == approx(25.603655)