def test_log1mexp_deprecation_warnings():
with pytest.warns(
FutureWarning,
match="pymc.math.log1mexp_numpy will expect a negative input",
):
res_pos = log1mexp_numpy(2)
with pytest.warns(None) as record:
res_neg = log1mexp_numpy(-2, negative_input=True)
assert not record
with pytest.warns(
FutureWarning,
match="pymc.math.log1mexp will expect a negative input",
):
res_pos_at = log1mexp(2).eval()
with pytest.warns(None):
res_neg_at = log1mexp(-2, negative_input=True).eval()
assert np.isclose(res_pos, res_neg)
assert np.isclose(res_pos_at, res_neg)
assert np.isclose(res_neg_at, res_neg)
def test_log1mexp():
vals = np.array([-1, 0, 1e-20, 1e-4, 10, 100, 1e20])
vals_ = vals.copy()
# import mpmath
# mpmath.mp.dps = 1000
# [float(mpmath.log(1 - mpmath.exp(-x))) for x in vals]
expected = np.array([
np.nan,
-np.inf,
-46.051701859880914,
-9.210390371559516,
-4.540096037048921e-05,
-3.720075976020836e-44,
0.0,
])
actual = at.log1mexp(-vals).eval()
npt.assert_allclose(actual, expected)
actual_ = log1mexp_numpy(-vals, negative_input=True)
npt.assert_allclose(actual_, expected)
# Check that input was not changed in place
npt.assert_allclose(vals, vals_)
def test_log1mexp_numpy_integer_input():
assert np.isclose(log1mexp_numpy(-2, negative_input=True),
at.log1mexp(-2).eval())
def test_log1mexp_numpy_no_warning():
"""Assert RuntimeWarning is not raised for very small numbers"""
with pytest.warns(None) as record:
log1mexp_numpy(-1e-25, negative_input=True)
assert not record
