50 lines
1.1 KiB
Python
50 lines
1.1 KiB
Python
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"""
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Created on Wed Feb 29 10:34:00 2012
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Author: Josef Perktold
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"""
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from statsmodels.compat import lrange
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from itertools import combinations, zip_longest
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from numpy.testing import assert_
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def test_zip_longest():
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lili = [
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["a0", "b0", "c0", "d0"],
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["a1", "b1", "c1"],
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["a2", "b2", "c2", "d2"],
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["a3", "b3", "c3", "d3"],
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["a4", "b4"],
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]
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transposed = [
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("a0", "a1", "a2", "a3", "a4"),
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("b0", "b1", "b2", "b3", "b4"),
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("c0", "c1", "c2", "c3", None),
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("d0", None, "d2", "d3", None),
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]
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assert_(
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list(zip_longest(*lili)) == transposed,
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f"{zip_longest(*lili)!r} not equal {transposed!r}",
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)
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def test_combinations():
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actual = list(combinations("ABCD", 2))
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desired = [
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("A", "B"),
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("A", "C"),
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("A", "D"),
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("B", "C"),
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("B", "D"),
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("C", "D"),
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]
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assert_(actual == desired, f"{actual!r} not equal {desired!r}")
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actual = list(combinations(lrange(4), 3))
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desired = [(0, 1, 2), (0, 1, 3), (0, 2, 3), (1, 2, 3)]
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assert_(actual == desired, f"{actual!r} not equal {desired!r}")
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