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# -*- coding: utf-8 -*- |
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# emacs: -*- mode: python; py-indent-offset: 4; indent-tabs-mode: nil -*- |
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# vi: set ft=python sts=4 ts=4 sw=4 et: |
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import pytest |
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from collections import Iterable, Sized |
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from itertools import chain, product |
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from hansel.utils import remove_duplicates, ParameterGrid |
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@pytest.fixture(scope="module") |
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def values(request): |
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return list(range(3)) |
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def test_remove_duplicates(values): |
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assert remove_duplicates(values * 10) == sorted(values) |
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assert remove_duplicates(values) == sorted(values) |
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assert remove_duplicates(values) == sorted(remove_duplicates(values)) |
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def test_parameter_grid(): |
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# Taken from sklearn and converted to pytest |
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# Test basic properties of ParameterGrid. |
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def assert_grid_iter_equals_getitem(grid): |
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assert list(grid) == [grid[i] for i in range(len(grid))] |
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params1 = {"foo": [1, 2, 3]} |
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grid1 = ParameterGrid(params1) |
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assert isinstance(grid1, Iterable) |
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assert isinstance(grid1, Sized) |
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assert len(grid1) == 3 |
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assert_grid_iter_equals_getitem(grid1) |
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params2 = {"foo": [4, 2], |
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"bar": ["ham", "spam", "eggs"]} |
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grid2 = ParameterGrid(params2) |
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assert len(grid2) == 6 |
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# loop to assert we can iterate over the grid multiple times |
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for i in range(2): |
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# tuple + chain transforms {"a": 1, "b": 2} to ("a", 1, "b", 2) |
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points = set(tuple(chain(*(sorted(p.items())))) for p in grid2) |
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assert points == set(("bar", x, "foo", y) |
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for x, y in product(params2["bar"], params2["foo"])) |
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assert_grid_iter_equals_getitem(grid2) |
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# Special case: empty grid (useful to get default estimator settings) |
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empty = ParameterGrid({}) |
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assert len(empty) == 1 |
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assert list(empty) == [{}] |
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assert_grid_iter_equals_getitem(empty) |
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pytest.raises(IndexError, lambda: empty[1]) |
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has_empty = ParameterGrid([{'C': [1, 10]}, {}, {'C': [.5]}]) |
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assert len(has_empty) == 4 |
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assert list(has_empty) == [{'C': 1}, {'C': 10}, {}, {'C': .5}] |
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assert_grid_iter_equals_getitem(has_empty) |
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alexsavio /
hansel
