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test_distribution_defaults.py
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test_distribution_defaults.py
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# Copyright 2020 The PyMC Developers
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from ..model import Model
from ..distributions import DiscreteUniform, Continuous, Categorical
import numpy as np
import pytest
class DistTest(Continuous):
def __init__(self, a, b, *args, **kwargs):
super().__init__(*args, **kwargs)
self.a = a
self.b = b
def logp(self, v):
return 0
def test_default_nan_fail():
with Model(), pytest.raises(AttributeError):
DistTest('x', np.nan, 2, defaults=['a'])
def test_default_empty_fail():
with Model(), pytest.raises(AttributeError):
DistTest('x', 1, 2, defaults=[])
def test_default_testval():
with Model():
x = DistTest('x', 1, 2, testval=5, defaults=[])
assert x.tag.test_value == 5
def test_default_testval_nan():
with Model():
x = DistTest('x', 1, 2, testval=np.nan, defaults=['a'])
np.testing.assert_almost_equal(x.tag.test_value, np.nan)
def test_default_a():
with Model():
x = DistTest('x', 1, 2, defaults=['a'])
assert x.tag.test_value == 1
def test_default_b():
with Model():
x = DistTest('x', np.nan, 2, defaults=['a', 'b'])
assert x.tag.test_value == 2
def test_default_c():
with Model():
y = DistTest('y', 7, 8, testval=94)
x = DistTest('x', y, 2, defaults=['a', 'b'])
assert x.tag.test_value == 94
def test_default_discrete_uniform():
with Model():
x = DiscreteUniform('x', lower=1, upper=2)
assert x.init_value == 1
def test_discrete_uniform_negative():
model = Model()
with model:
x = DiscreteUniform('x', lower=-10, upper=0)
assert model.test_point['x'] == -5
def test_categorical_mode():
model = Model()
with model:
x = Categorical('x', p=np.eye(4), shape=4)
assert np.allclose(model.test_point['x'], np.arange(4))