def test_lsh_hash_nearby(scale):
k = 5
lsh = LSH(scale)
a = -2 * scale + torch.rand(k) * scale * 0.49
b = -1 * scale + torch.rand(k) * scale * 0.49
c = torch.rand(k) * scale * 0.49
d = scale + torch.rand(k) * scale * 0.49
e = 2 * scale + torch.rand(k) * scale * 0.49
f = 4 * scale + torch.rand(k) * scale * 0.49
assert_equal(lsh._hash(a), (-2,) * k)
assert_equal(lsh._hash(b), (-1,) * k)
assert_equal(lsh._hash(c), (0,) * k)
assert_equal(lsh._hash(d), (1,) * k)
assert_equal(lsh._hash(e), (2,) * k)
assert_equal(lsh._hash(f), (4,) * k)
lsh.add('a', a)
lsh.add('b', b)
lsh.add('c', c)
lsh.add('d', d)
lsh.add('e', e)
lsh.add('f', f)
assert lsh.nearby('a') == {'b'}
assert lsh.nearby('b') == {'a', 'c'}
assert lsh.nearby('c') == {'b', 'd'}
assert lsh.nearby('d') == {'c', 'e'}
assert lsh.nearby('e') == {'d'}
assert lsh.nearby('f') == set()
def test_lsh_hash_nearby(scale):
k = 5
lsh = LSH(scale)
a = -2 * scale + torch.rand(k) * scale * 0.49
b = -1 * scale + torch.rand(k) * scale * 0.49
c = torch.rand(k) * scale * 0.49
d = scale + torch.rand(k) * scale * 0.49
e = 2 * scale + torch.rand(k) * scale * 0.49
f = 4 * scale + torch.rand(k) * scale * 0.49
assert_equal(lsh._hash(a), (-2,) * k)
assert_equal(lsh._hash(b), (-1,) * k)
assert_equal(lsh._hash(c), (0,) * k)
assert_equal(lsh._hash(d), (1,) * k)
assert_equal(lsh._hash(e), (2,) * k)
assert_equal(lsh._hash(f), (4,) * k)
lsh.add("a", a)
lsh.add("b", b)
lsh.add("c", c)
lsh.add("d", d)
lsh.add("e", e)
lsh.add("f", f)
assert lsh.nearby("a") == {"b"}
assert lsh.nearby("b") == {"a", "c"}
assert lsh.nearby("c") == {"b", "d"}
assert lsh.nearby("d") == {"c", "e"}
assert lsh.nearby("e") == {"d"}
assert lsh.nearby("f") == set()
def test_lsh_remove():
lsh = LSH(1)
a = torch.zeros(2)
b = torch.ones(2)
lsh.add('a', a)
lsh.add('b', b)
assert lsh.nearby('a') == {'b'}
lsh.remove('b')
assert lsh.nearby('a') == set()
def test_lsh_remove():
lsh = LSH(1)
a = torch.zeros(2)
b = torch.ones(2)
lsh.add("a", a)
lsh.add("b", b)
assert lsh.nearby("a") == {"b"}
lsh.remove("b")
assert lsh.nearby("a") == set()
def test_lsh_overwrite():
lsh = LSH(1)
a = torch.zeros(2)
b = torch.ones(2)
lsh.add('a', a)
lsh.add('b', b)
assert lsh.nearby('a') == {'b'}
b = torch.ones(2) * 4
lsh.add('b', b)
assert lsh.nearby('a') == set()
def test_lsh_overwrite():
lsh = LSH(1)
a = torch.zeros(2)
b = torch.ones(2)
lsh.add("a", a)
lsh.add("b", b)
assert lsh.nearby("a") == {"b"}
b = torch.ones(2) * 4
lsh.add("b", b)
assert lsh.nearby("a") == set()