def test_feats_add():
bags = [np.random.normal(size=(np.random.randint(10, 100), 10))
for _ in xrange(20)]
labels = np.arange(20)
first_15 = Features(bags[:15], labels=labels[:15])
last_5 = Features(bags[15:], labels=labels[15:])
plus = first_15 + last_5
assert len(plus) == 20
assert plus[:15] == first_15
plus_list = first_15 + bags[15:]
assert len(plus_list) == 20
assert not plus_list.meta
assert np.all(plus_list[16] == bags[16])
plus_singlelist = first_15 + [bags[18]]
assert np.all(plus_singlelist[15] == bags[18])
rplus_list = bags[15:] + first_15
assert np.all(rplus_list[0] == bags[15])
rplus_singlelist = [bags[15]] + first_15
assert np.all(rplus_singlelist[0] == bags[15])
assert rplus_singlelist[1:] == first_15.bare()
wrong_type(lambda: first_15 + 12)
wrong_type(lambda: 12 + first_15)
assert_raises(ValueError, lambda: first_15 + np.asarray(bags))
def test_copy_constructor():
bags = [np.random.normal(size=(np.random.randint(10, 100), 10))
for _ in xrange(20)]
unstacked = Features(bags, label=np.arange(20))
oth_unstacked = Features(unstacked)
assert oth_unstacked.label is unstacked.label
assert oth_unstacked.features[0] is unstacked.features[0]
assert oth_unstacked == unstacked
oth_unstacked_bare = Features(unstacked, bare=True)
assert oth_unstacked_bare == bags
assert oth_unstacked_bare.bare() == oth_unstacked_bare
oth_unstacked = Features(unstacked, label=np.ones(20))
assert np.all(oth_unstacked.label == 1)
oth_unstacked2 = Features(unstacked, bare=True, label=np.arange(20))
assert oth_unstacked2 == unstacked
oth_unstacked_copy = Features(unstacked, copy=True)
assert oth_unstacked_copy == unstacked
assert not np.may_share_memory(oth_unstacked_copy.features[0],
unstacked.features[0])
stacked = unstacked.copy()
stacked.make_stacked()
oth_stacked = Features(stacked)
assert oth_stacked == stacked
def test_features_basic():
bags = [np.random.normal(size=(np.random.randint(10, 100), 10))
for _ in xrange(20)]
assert repr(Features([[[8, 9], [12, 12]]]))
feats = Features(bags, copy=False, stack=False, label=np.arange(20))
assert len(feats) == 20
assert feats.total_points == sum(bag.shape[0] for bag in bags)
assert np.all(feats[3] == bags[3])
assert np.all(feats.label == np.arange(20))
assert repr(feats)
assert feats.dtype == np.float64
assert feats != bags
assert feats.bare() == bags
sub = feats[[5, 2]]
assert np.all(sub.label == [5, 2])
assert np.all(sub[0] == feats[5])
assert np.all(sub[1] == feats[2])
assert repr(sub)
feats[4][0, 0] = 1000
assert bags[4][0, 0] == 1000
feats.make_stacked()
assert feats != bags
assert feats.bare() == bags
assert len(feats) == 20
assert feats.total_points == sum(bag.shape[0] for bag in bags)
assert np.all(feats[3] == bags[3])
assert np.all(feats.label == np.arange(20))
feats[0][0, 0] = -800
assert feats.features[0][0, 0] == -800
assert feats.stacked_features[0, 0] == -800
assert repr(feats)
wrong_type(lambda: feats['label'])
wrong_type(lambda: feats[['label']])
wrong_type(lambda: feats[[3, 'label']])
cop = feats.copy()
assert cop == feats
assert cop.stacked
cop.make_stacked()
assert cop == feats
cop[0][0, 0] = 12
assert cop != feats
assert repr(cop)
fs = lambda *a, **kw: partial(Features, *a, **kw)
bags = np.random.normal(size=(10, 5))
wrong_type(fs(bags))
wrong_type(fs(bags, [[4], [12]]))
wrong_type(fs(bags, []))
wrong_type(fs(bags, [-3, 13]))
wrong_type(fs(bags, [7.5, 2.5]))
wrong_type(fs(bags, [7, 2]))
wrong_type(fs(np.zeros((10, 0)), [7, 3]))
bags = [np.random.normal(size=(5, 8)), np.random.normal(size=(6, 8))]
wrong_type(fs(bags, [5, 6]))
assert np.all(
Features([[5, 6], [[7, 9], [0, 0]]])[0] == np.reshape([5, 6], (1, 2)))
wrong_type(fs([ [[[5]]] ]))
wrong_type(fs([["hello", "there"]]))
wrong_type(fs([[np.arange(10, dtype=int)], [np.arange(10, dtype=float)]]))
wrong_type(fs([np.random.randn(8, 7), np.random.randn(0, 7)]))
assert np.all(
Features([[[1, 2]], [[3, 4]]], stack=True).stacked_features
== [[1, 2], [3, 4]])
assert_raises(ValueError, fs(bags, labels=np.arange(3)))
with warnings.catch_warnings(record=True) as w:
Features(bags, total_points=[1, 2])
assert len(w) == 1