finalizare 1.0

backend/venv/Lib/site-packages/sklearn/svm/__init__.py

@@ -0,0 +1,25 @@
+"""
+The :mod:`sklearn.svm` module includes Support Vector Machine algorithms.
+"""
+
+# See http://scikit-learn.sourceforge.net/modules/svm.html for complete
+# documentation.
+
+# Author: Fabian Pedregosa <fabian.pedregosa@inria.fr> with help from
+#         the scikit-learn community. LibSVM and LibLinear are copyright
+#         of their respective owners.
+# License: BSD 3 clause (C) INRIA 2010
+
+from ._bounds import l1_min_c
+from ._classes import SVC, SVR, LinearSVC, LinearSVR, NuSVC, NuSVR, OneClassSVM
+
+__all__ = [
+    "LinearSVC",
+    "LinearSVR",
+    "NuSVC",
+    "NuSVR",
+    "OneClassSVM",
+    "SVC",
+    "SVR",
+    "l1_min_c",
+]

backend/venv/Lib/site-packages/sklearn/svm/_bounds.py

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+"""Determination of parameter bounds"""
+# Author: Paolo Losi
+# License: BSD 3 clause
+
+from numbers import Real
+
+import numpy as np
+
+from ..preprocessing import LabelBinarizer
+from ..utils._param_validation import Interval, StrOptions, validate_params
+from ..utils.extmath import safe_sparse_dot
+from ..utils.validation import check_array, check_consistent_length
+
+
+@validate_params(
+    {
+        "X": ["array-like", "sparse matrix"],
+        "y": ["array-like"],
+        "loss": [StrOptions({"squared_hinge", "log"})],
+        "fit_intercept": ["boolean"],
+        "intercept_scaling": [Interval(Real, 0, None, closed="neither")],
+    },
+    prefer_skip_nested_validation=True,
+)
+def l1_min_c(X, y, *, loss="squared_hinge", fit_intercept=True, intercept_scaling=1.0):
+    """Return the lowest bound for C.
+
+    The lower bound for C is computed such that for C in (l1_min_C, infinity)
+    the model is guaranteed not to be empty. This applies to l1 penalized
+    classifiers, such as LinearSVC with penalty='l1' and
+    linear_model.LogisticRegression with penalty='l1'.
+
+    This value is valid if class_weight parameter in fit() is not set.
+
+    Parameters
+    ----------
+    X : {array-like, sparse matrix} of shape (n_samples, n_features)
+        Training vector, where `n_samples` is the number of samples and
+        `n_features` is the number of features.
+
+    y : array-like of shape (n_samples,)
+        Target vector relative to X.
+
+    loss : {'squared_hinge', 'log'}, default='squared_hinge'
+        Specifies the loss function.
+        With 'squared_hinge' it is the squared hinge loss (a.k.a. L2 loss).
+        With 'log' it is the loss of logistic regression models.
+
+    fit_intercept : bool, default=True
+        Specifies if the intercept should be fitted by the model.
+        It must match the fit() method parameter.
+
+    intercept_scaling : float, default=1.0
+        When fit_intercept is True, instance vector x becomes
+        [x, intercept_scaling],
+        i.e. a "synthetic" feature with constant value equals to
+        intercept_scaling is appended to the instance vector.
+        It must match the fit() method parameter.
+
+    Returns
+    -------
+    l1_min_c : float
+        Minimum value for C.
+
+    Examples
+    --------
+    >>> from sklearn.svm import l1_min_c
+    >>> from sklearn.datasets import make_classification
+    >>> X, y = make_classification(n_samples=100, n_features=20, random_state=42)
+    >>> print(f"{l1_min_c(X, y, loss='squared_hinge', fit_intercept=True):.4f}")
+    0.0044
+    """
+
+    X = check_array(X, accept_sparse="csc")
+    check_consistent_length(X, y)
+
+    Y = LabelBinarizer(neg_label=-1).fit_transform(y).T
+    # maximum absolute value over classes and features
+    den = np.max(np.abs(safe_sparse_dot(Y, X)))
+    if fit_intercept:
+        bias = np.full(
+            (np.size(y), 1), intercept_scaling, dtype=np.array(intercept_scaling).dtype
+        )
+        den = max(den, abs(np.dot(Y, bias)).max())
+
+    if den == 0.0:
+        raise ValueError(
+            "Ill-posed l1_min_c calculation: l1 will always "
+            "select zero coefficients for this data"
+        )
+    if loss == "squared_hinge":
+        return 0.5 / den
+    else:  # loss == 'log':
+        return 2.0 / den

backend/venv/Lib/site-packages/sklearn/svm/tests/test_bounds.py

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+import numpy as np
+import pytest
+from scipy import stats
+
+from sklearn.linear_model import LogisticRegression
+from sklearn.svm import LinearSVC
+from sklearn.svm._bounds import l1_min_c
+from sklearn.svm._newrand import bounded_rand_int_wrap, set_seed_wrap
+from sklearn.utils.fixes import CSR_CONTAINERS
+
+dense_X = [[-1, 0], [0, 1], [1, 1], [1, 1]]
+
+Y1 = [0, 1, 1, 1]
+Y2 = [2, 1, 0, 0]
+
+
+@pytest.mark.parametrize("X_container", CSR_CONTAINERS + [np.array])
+@pytest.mark.parametrize("loss", ["squared_hinge", "log"])
+@pytest.mark.parametrize("Y_label", ["two-classes", "multi-class"])
+@pytest.mark.parametrize("intercept_label", ["no-intercept", "fit-intercept"])
+def test_l1_min_c(X_container, loss, Y_label, intercept_label):
+    Ys = {"two-classes": Y1, "multi-class": Y2}
+    intercepts = {
+        "no-intercept": {"fit_intercept": False},
+        "fit-intercept": {"fit_intercept": True, "intercept_scaling": 10},
+    }
+
+    X = X_container(dense_X)
+    Y = Ys[Y_label]
+    intercept_params = intercepts[intercept_label]
+    check_l1_min_c(X, Y, loss, **intercept_params)
+
+
+def check_l1_min_c(X, y, loss, fit_intercept=True, intercept_scaling=1.0):
+    min_c = l1_min_c(
+        X,
+        y,
+        loss=loss,
+        fit_intercept=fit_intercept,
+        intercept_scaling=intercept_scaling,
+    )
+
+    clf = {
+        "log": LogisticRegression(penalty="l1", solver="liblinear"),
+        "squared_hinge": LinearSVC(loss="squared_hinge", penalty="l1", dual=False),
+    }[loss]
+
+    clf.fit_intercept = fit_intercept
+    clf.intercept_scaling = intercept_scaling
+
+    clf.C = min_c
+    clf.fit(X, y)
+    assert (np.asarray(clf.coef_) == 0).all()
+    assert (np.asarray(clf.intercept_) == 0).all()
+
+    clf.C = min_c * 1.01
+    clf.fit(X, y)
+    assert (np.asarray(clf.coef_) != 0).any() or (np.asarray(clf.intercept_) != 0).any()
+
+
+def test_ill_posed_min_c():
+    X = [[0, 0], [0, 0]]
+    y = [0, 1]
+    with pytest.raises(ValueError):
+        l1_min_c(X, y)
+
+
+_MAX_UNSIGNED_INT = 4294967295
+
+
+def test_newrand_default():
+    """Test that bounded_rand_int_wrap without seeding respects the range
+
+    Note this test should pass either if executed alone, or in conjunctions
+    with other tests that call set_seed explicit in any order: it checks
+    invariants on the RNG instead of specific values.
+    """
+    generated = [bounded_rand_int_wrap(100) for _ in range(10)]
+    assert all(0 <= x < 100 for x in generated)
+    assert not all(x == generated[0] for x in generated)
+
+
+@pytest.mark.parametrize("seed, expected", [(0, 54), (_MAX_UNSIGNED_INT, 9)])
+def test_newrand_set_seed(seed, expected):
+    """Test that `set_seed` produces deterministic results"""
+    set_seed_wrap(seed)
+    generated = bounded_rand_int_wrap(100)
+    assert generated == expected
+
+
+@pytest.mark.parametrize("seed", [-1, _MAX_UNSIGNED_INT + 1])
+def test_newrand_set_seed_overflow(seed):
+    """Test that `set_seed_wrap` is defined for unsigned 32bits ints"""
+    with pytest.raises(OverflowError):
+        set_seed_wrap(seed)
+
+
+@pytest.mark.parametrize("range_, n_pts", [(_MAX_UNSIGNED_INT, 10000), (100, 25)])
+def test_newrand_bounded_rand_int(range_, n_pts):
+    """Test that `bounded_rand_int` follows a uniform distribution"""
+    # XXX: this test is very seed sensitive: either it is wrong (too strict?)
+    # or the wrapped RNG is not uniform enough, at least on some platforms.
+    set_seed_wrap(42)
+    n_iter = 100
+    ks_pvals = []
+    uniform_dist = stats.uniform(loc=0, scale=range_)
+    # perform multiple samplings to make chance of outlier sampling negligible
+    for _ in range(n_iter):
+        # Deterministic random sampling
+        sample = [bounded_rand_int_wrap(range_) for _ in range(n_pts)]
+        res = stats.kstest(sample, uniform_dist.cdf)
+        ks_pvals.append(res.pvalue)
+    # Null hypothesis = samples come from an uniform distribution.
+    # Under the null hypothesis, p-values should be uniformly distributed
+    # and not concentrated on low values
+    # (this may seem counter-intuitive but is backed by multiple refs)
+    # So we can do two checks:
+
+    # (1) check uniformity of p-values
+    uniform_p_vals_dist = stats.uniform(loc=0, scale=1)
+    res_pvals = stats.kstest(ks_pvals, uniform_p_vals_dist.cdf)
+    assert res_pvals.pvalue > 0.05, (
+        "Null hypothesis rejected: generated random numbers are not uniform."
+        " Details: the (meta) p-value of the test of uniform distribution"
+        f" of p-values is {res_pvals.pvalue} which is not > 0.05"
+    )
+
+    # (2) (safety belt) check that 90% of p-values are above 0.05
+    min_10pct_pval = np.percentile(ks_pvals, q=10)
+    # lower 10th quantile pvalue <= 0.05 means that the test rejects the
+    # null hypothesis that the sample came from the uniform distribution
+    assert min_10pct_pval > 0.05, (
+        "Null hypothesis rejected: generated random numbers are not uniform. "
+        f"Details: lower 10th quantile p-value of {min_10pct_pval} not > 0.05."
+    )
+
+
+@pytest.mark.parametrize("range_", [-1, _MAX_UNSIGNED_INT + 1])
+def test_newrand_bounded_rand_int_limits(range_):
+    """Test that `bounded_rand_int_wrap` is defined for unsigned 32bits ints"""
+    with pytest.raises(OverflowError):
+        bounded_rand_int_wrap(range_)

backend/venv/Lib/site-packages/sklearn/svm/tests/test_sparse.py

@@ -0,0 +1,493 @@
+import numpy as np
+import pytest
+from scipy import sparse
+
+from sklearn import base, datasets, linear_model, svm
+from sklearn.datasets import load_digits, make_blobs, make_classification
+from sklearn.exceptions import ConvergenceWarning
+from sklearn.svm.tests import test_svm
+from sklearn.utils._testing import (
+    assert_allclose,
+    assert_array_almost_equal,
+    assert_array_equal,
+    ignore_warnings,
+    skip_if_32bit,
+)
+from sklearn.utils.extmath import safe_sparse_dot
+from sklearn.utils.fixes import (
+    CSR_CONTAINERS,
+    DOK_CONTAINERS,
+    LIL_CONTAINERS,
+)
+
+# test sample 1
+X = np.array([[-2, -1], [-1, -1], [-1, -2], [1, 1], [1, 2], [2, 1]])
+Y = [1, 1, 1, 2, 2, 2]
+T = np.array([[-1, -1], [2, 2], [3, 2]])
+true_result = [1, 2, 2]
+
+# test sample 2
+X2 = np.array(
+    [
+        [0, 0, 0],
+        [1, 1, 1],
+        [2, 0, 0],
+        [0, 0, 2],
+        [3, 3, 3],
+    ]
+)
+Y2 = [1, 2, 2, 2, 3]
+T2 = np.array([[-1, -1, -1], [1, 1, 1], [2, 2, 2]])
+true_result2 = [1, 2, 3]
+
+iris = datasets.load_iris()
+rng = np.random.RandomState(0)
+perm = rng.permutation(iris.target.size)
+iris.data = iris.data[perm]
+iris.target = iris.target[perm]
+
+X_blobs, y_blobs = make_blobs(n_samples=100, centers=10, random_state=0)
+
+
+def check_svm_model_equal(dense_svm, X_train, y_train, X_test):
+    # Use the original svm model for dense fit and clone an exactly same
+    # svm model for sparse fit
+    sparse_svm = base.clone(dense_svm)
+
+    dense_svm.fit(X_train.toarray(), y_train)
+    if sparse.issparse(X_test):
+        X_test_dense = X_test.toarray()
+    else:
+        X_test_dense = X_test
+    sparse_svm.fit(X_train, y_train)
+    assert sparse.issparse(sparse_svm.support_vectors_)
+    assert sparse.issparse(sparse_svm.dual_coef_)
+    assert_allclose(dense_svm.support_vectors_, sparse_svm.support_vectors_.toarray())
+    assert_allclose(dense_svm.dual_coef_, sparse_svm.dual_coef_.toarray())
+    if dense_svm.kernel == "linear":
+        assert sparse.issparse(sparse_svm.coef_)
+        assert_array_almost_equal(dense_svm.coef_, sparse_svm.coef_.toarray())
+    assert_allclose(dense_svm.support_, sparse_svm.support_)
+    assert_allclose(dense_svm.predict(X_test_dense), sparse_svm.predict(X_test))
+
+    assert_array_almost_equal(
+        dense_svm.decision_function(X_test_dense), sparse_svm.decision_function(X_test)
+    )
+    assert_array_almost_equal(
+        dense_svm.decision_function(X_test_dense),
+        sparse_svm.decision_function(X_test_dense),
+    )
+    if isinstance(dense_svm, svm.OneClassSVM):
+        msg = "cannot use sparse input in 'OneClassSVM' trained on dense data"
+    else:
+        assert_array_almost_equal(
+            dense_svm.predict_proba(X_test_dense),
+            sparse_svm.predict_proba(X_test),
+            decimal=4,
+        )
+        msg = "cannot use sparse input in 'SVC' trained on dense data"
+    if sparse.issparse(X_test):
+        with pytest.raises(ValueError, match=msg):
+            dense_svm.predict(X_test)
+
+
+@skip_if_32bit
+@pytest.mark.parametrize(
+    "X_train, y_train, X_test",
+    [
+        [X, Y, T],
+        [X2, Y2, T2],
+        [X_blobs[:80], y_blobs[:80], X_blobs[80:]],
+        [iris.data, iris.target, iris.data],
+    ],
+)
+@pytest.mark.parametrize("kernel", ["linear", "poly", "rbf", "sigmoid"])
+@pytest.mark.parametrize("sparse_container", CSR_CONTAINERS + LIL_CONTAINERS)
+def test_svc(X_train, y_train, X_test, kernel, sparse_container):
+    """Check that sparse SVC gives the same result as SVC."""
+    X_train = sparse_container(X_train)
+
+    clf = svm.SVC(
+        gamma=1,
+        kernel=kernel,
+        probability=True,
+        random_state=0,
+        decision_function_shape="ovo",
+    )
+    check_svm_model_equal(clf, X_train, y_train, X_test)
+
+
+@pytest.mark.parametrize("csr_container", CSR_CONTAINERS)
+def test_unsorted_indices(csr_container):
+    # test that the result with sorted and unsorted indices in csr is the same
+    # we use a subset of digits as iris, blobs or make_classification didn't
+    # show the problem
+    X, y = load_digits(return_X_y=True)
+    X_test = csr_container(X[50:100])
+    X, y = X[:50], y[:50]
+
+    X_sparse = csr_container(X)
+    coef_dense = (
+        svm.SVC(kernel="linear", probability=True, random_state=0).fit(X, y).coef_
+    )
+    sparse_svc = svm.SVC(kernel="linear", probability=True, random_state=0).fit(
+        X_sparse, y
+    )
+    coef_sorted = sparse_svc.coef_
+    # make sure dense and sparse SVM give the same result
+    assert_allclose(coef_dense, coef_sorted.toarray())
+
+    # reverse each row's indices
+    def scramble_indices(X):
+        new_data = []
+        new_indices = []
+        for i in range(1, len(X.indptr)):
+            row_slice = slice(*X.indptr[i - 1 : i + 1])
+            new_data.extend(X.data[row_slice][::-1])
+            new_indices.extend(X.indices[row_slice][::-1])
+        return csr_container((new_data, new_indices, X.indptr), shape=X.shape)
+
+    X_sparse_unsorted = scramble_indices(X_sparse)
+    X_test_unsorted = scramble_indices(X_test)
+
+    assert not X_sparse_unsorted.has_sorted_indices
+    assert not X_test_unsorted.has_sorted_indices
+
+    unsorted_svc = svm.SVC(kernel="linear", probability=True, random_state=0).fit(
+        X_sparse_unsorted, y
+    )
+    coef_unsorted = unsorted_svc.coef_
+    # make sure unsorted indices give same result
+    assert_allclose(coef_unsorted.toarray(), coef_sorted.toarray())
+    assert_allclose(
+        sparse_svc.predict_proba(X_test_unsorted), sparse_svc.predict_proba(X_test)
+    )
+
+
+@pytest.mark.parametrize("lil_container", LIL_CONTAINERS)
+def test_svc_with_custom_kernel(lil_container):
+    def kfunc(x, y):
+        return safe_sparse_dot(x, y.T)
+
+    X_sp = lil_container(X)
+    clf_lin = svm.SVC(kernel="linear").fit(X_sp, Y)
+    clf_mylin = svm.SVC(kernel=kfunc).fit(X_sp, Y)
+    assert_array_equal(clf_lin.predict(X_sp), clf_mylin.predict(X_sp))
+
+
+@skip_if_32bit
+@pytest.mark.parametrize("csr_container", CSR_CONTAINERS)
+@pytest.mark.parametrize("kernel", ["linear", "poly", "rbf"])
+def test_svc_iris(csr_container, kernel):
+    # Test the sparse SVC with the iris dataset
+    iris_data_sp = csr_container(iris.data)
+
+    sp_clf = svm.SVC(kernel=kernel).fit(iris_data_sp, iris.target)
+    clf = svm.SVC(kernel=kernel).fit(iris.data, iris.target)
+
+    assert_allclose(clf.support_vectors_, sp_clf.support_vectors_.toarray())
+    assert_allclose(clf.dual_coef_, sp_clf.dual_coef_.toarray())
+    assert_allclose(clf.predict(iris.data), sp_clf.predict(iris_data_sp))
+    if kernel == "linear":
+        assert_allclose(clf.coef_, sp_clf.coef_.toarray())
+
+
+@pytest.mark.parametrize("csr_container", CSR_CONTAINERS)
+def test_sparse_decision_function(csr_container):
+    # Test decision_function
+
+    # Sanity check, test that decision_function implemented in python
+    # returns the same as the one in libsvm
+
+    # multi class:
+    iris_data_sp = csr_container(iris.data)
+    svc = svm.SVC(kernel="linear", C=0.1, decision_function_shape="ovo")
+    clf = svc.fit(iris_data_sp, iris.target)
+
+    dec = safe_sparse_dot(iris_data_sp, clf.coef_.T) + clf.intercept_
+
+    assert_allclose(dec, clf.decision_function(iris_data_sp))
+
+    # binary:
+    clf.fit(X, Y)
+    dec = np.dot(X, clf.coef_.T) + clf.intercept_
+    prediction = clf.predict(X)
+    assert_allclose(dec.ravel(), clf.decision_function(X))
+    assert_allclose(
+        prediction, clf.classes_[(clf.decision_function(X) > 0).astype(int).ravel()]
+    )
+    expected = np.array([-1.0, -0.66, -1.0, 0.66, 1.0, 1.0])
+    assert_array_almost_equal(clf.decision_function(X), expected, decimal=2)
+
+
+@pytest.mark.parametrize("lil_container", LIL_CONTAINERS)
+def test_error(lil_container):
+    # Test that it gives proper exception on deficient input
+    clf = svm.SVC()
+    X_sp = lil_container(X)
+
+    Y2 = Y[:-1]  # wrong dimensions for labels
+    with pytest.raises(ValueError):
+        clf.fit(X_sp, Y2)
+
+    clf.fit(X_sp, Y)
+    assert_array_equal(clf.predict(T), true_result)
+
+
+@pytest.mark.parametrize(
+    "lil_container, dok_container", zip(LIL_CONTAINERS, DOK_CONTAINERS)
+)
+def test_linearsvc(lil_container, dok_container):
+    # Similar to test_SVC
+    X_sp = lil_container(X)
+    X2_sp = dok_container(X2)
+
+    clf = svm.LinearSVC(dual="auto", random_state=0).fit(X, Y)
+    sp_clf = svm.LinearSVC(dual="auto", random_state=0).fit(X_sp, Y)
+
+    assert sp_clf.fit_intercept
+
+    assert_array_almost_equal(clf.coef_, sp_clf.coef_, decimal=4)
+    assert_array_almost_equal(clf.intercept_, sp_clf.intercept_, decimal=4)
+
+    assert_allclose(clf.predict(X), sp_clf.predict(X_sp))
+
+    clf.fit(X2, Y2)
+    sp_clf.fit(X2_sp, Y2)
+
+    assert_array_almost_equal(clf.coef_, sp_clf.coef_, decimal=4)
+    assert_array_almost_equal(clf.intercept_, sp_clf.intercept_, decimal=4)
+
+
+@pytest.mark.parametrize("csr_container", CSR_CONTAINERS)
+def test_linearsvc_iris(csr_container):
+    # Test the sparse LinearSVC with the iris dataset
+    iris_data_sp = csr_container(iris.data)
+
+    sp_clf = svm.LinearSVC(dual="auto", random_state=0).fit(iris_data_sp, iris.target)
+    clf = svm.LinearSVC(dual="auto", random_state=0).fit(iris.data, iris.target)
+
+    assert clf.fit_intercept == sp_clf.fit_intercept
+
+    assert_array_almost_equal(clf.coef_, sp_clf.coef_, decimal=1)
+    assert_array_almost_equal(clf.intercept_, sp_clf.intercept_, decimal=1)
+    assert_allclose(clf.predict(iris.data), sp_clf.predict(iris_data_sp))
+
+    # check decision_function
+    pred = np.argmax(sp_clf.decision_function(iris_data_sp), axis=1)
+    assert_allclose(pred, clf.predict(iris.data))
+
+    # sparsify the coefficients on both models and check that they still
+    # produce the same results
+    clf.sparsify()
+    assert_array_equal(pred, clf.predict(iris_data_sp))
+    sp_clf.sparsify()
+    assert_array_equal(pred, sp_clf.predict(iris_data_sp))
+
+
+@pytest.mark.parametrize("csr_container", CSR_CONTAINERS)
+def test_weight(csr_container):
+    # Test class weights
+    X_, y_ = make_classification(
+        n_samples=200, n_features=100, weights=[0.833, 0.167], random_state=0
+    )
+
+    X_ = csr_container(X_)
+    for clf in (
+        linear_model.LogisticRegression(),
+        svm.LinearSVC(dual="auto", random_state=0),
+        svm.SVC(),
+    ):
+        clf.set_params(class_weight={0: 5})
+        clf.fit(X_[:180], y_[:180])
+        y_pred = clf.predict(X_[180:])
+        assert np.sum(y_pred == y_[180:]) >= 11
+
+
+@pytest.mark.parametrize("lil_container", LIL_CONTAINERS)
+def test_sample_weights(lil_container):
+    # Test weights on individual samples
+    X_sp = lil_container(X)
+
+    clf = svm.SVC()
+    clf.fit(X_sp, Y)
+    assert_array_equal(clf.predict([X[2]]), [1.0])
+
+    sample_weight = [0.1] * 3 + [10] * 3
+    clf.fit(X_sp, Y, sample_weight=sample_weight)
+    assert_array_equal(clf.predict([X[2]]), [2.0])
+
+
+def test_sparse_liblinear_intercept_handling():
+    # Test that sparse liblinear honours intercept_scaling param
+    test_svm.test_dense_liblinear_intercept_handling(svm.LinearSVC)
+
+
+@pytest.mark.parametrize(
+    "X_train, y_train, X_test",
+    [
+        [X, None, T],
+        [X2, None, T2],
+        [X_blobs[:80], None, X_blobs[80:]],
+        [iris.data, None, iris.data],
+    ],
+)
+@pytest.mark.parametrize("kernel", ["linear", "poly", "rbf", "sigmoid"])
+@pytest.mark.parametrize("sparse_container", CSR_CONTAINERS + LIL_CONTAINERS)
+@skip_if_32bit
+def test_sparse_oneclasssvm(X_train, y_train, X_test, kernel, sparse_container):
+    # Check that sparse OneClassSVM gives the same result as dense OneClassSVM
+    X_train = sparse_container(X_train)
+
+    clf = svm.OneClassSVM(gamma=1, kernel=kernel)
+    check_svm_model_equal(clf, X_train, y_train, X_test)
+
+
+@pytest.mark.parametrize("csr_container", CSR_CONTAINERS)
+def test_sparse_realdata(csr_container):
+    # Test on a subset from the 20newsgroups dataset.
+    # This catches some bugs if input is not correctly converted into
+    # sparse format or weights are not correctly initialized.
+    data = np.array([0.03771744, 0.1003567, 0.01174647, 0.027069])
+
+    # SVC does not support large sparse, so we specify int32 indices
+    # In this case, `csr_matrix` automatically uses int32 regardless of the dtypes of
+    # `indices` and `indptr` but `csr_array` may or may not use the same dtype as
+    # `indices` and `indptr`, which would be int64 if not specified
+    indices = np.array([6, 5, 35, 31], dtype=np.int32)
+    indptr = np.array([0] * 8 + [1] * 32 + [2] * 38 + [4] * 3, dtype=np.int32)
+
+    X = csr_container((data, indices, indptr))
+    y = np.array(
+        [
+            1.0,
+            0.0,
+            2.0,
+            2.0,
+            1.0,
+            1.0,
+            1.0,
+            2.0,
+            2.0,
+            0.0,
+            1.0,
+            2.0,
+            2.0,
+            0.0,
+            2.0,
+            0.0,
+            3.0,
+            0.0,
+            3.0,
+            0.0,
+            1.0,
+            1.0,
+            3.0,
+            2.0,
+            3.0,
+            2.0,
+            0.0,
+            3.0,
+            1.0,
+            0.0,
+            2.0,
+            1.0,
+            2.0,
+            0.0,
+            1.0,
+            0.0,
+            2.0,
+            3.0,
+            1.0,
+            3.0,
+            0.0,
+            1.0,
+            0.0,
+            0.0,
+            2.0,
+            0.0,
+            1.0,
+            2.0,
+            2.0,
+            2.0,
+            3.0,
+            2.0,
+            0.0,
+            3.0,
+            2.0,
+            1.0,
+            2.0,
+            3.0,
+            2.0,
+            2.0,
+            0.0,
+            1.0,
+            0.0,
+            1.0,
+            2.0,
+            3.0,
+            0.0,
+            0.0,
+            2.0,
+            2.0,
+            1.0,
+            3.0,
+            1.0,
+            1.0,
+            0.0,
+            1.0,
+            2.0,
+            1.0,
+            1.0,
+            3.0,
+        ]
+    )
+
+    clf = svm.SVC(kernel="linear").fit(X.toarray(), y)
+    sp_clf = svm.SVC(kernel="linear").fit(X.tocoo(), y)
+
+    assert_array_equal(clf.support_vectors_, sp_clf.support_vectors_.toarray())
+    assert_array_equal(clf.dual_coef_, sp_clf.dual_coef_.toarray())
+
+
+@pytest.mark.parametrize("lil_container", LIL_CONTAINERS)
+def test_sparse_svc_clone_with_callable_kernel(lil_container):
+    # Test that the "dense_fit" is called even though we use sparse input
+    # meaning that everything works fine.
+    a = svm.SVC(C=1, kernel=lambda x, y: x @ y.T, probability=True, random_state=0)
+    b = base.clone(a)
+
+    X_sp = lil_container(X)
+    b.fit(X_sp, Y)
+    pred = b.predict(X_sp)
+    b.predict_proba(X_sp)
+
+    dense_svm = svm.SVC(
+        C=1, kernel=lambda x, y: np.dot(x, y.T), probability=True, random_state=0
+    )
+    pred_dense = dense_svm.fit(X, Y).predict(X)
+    assert_array_equal(pred_dense, pred)
+    # b.decision_function(X_sp)  # XXX : should be supported
+
+
+@pytest.mark.parametrize("lil_container", LIL_CONTAINERS)
+def test_timeout(lil_container):
+    sp = svm.SVC(
+        C=1, kernel=lambda x, y: x @ y.T, probability=True, random_state=0, max_iter=1
+    )
+    warning_msg = (
+        r"Solver terminated early \(max_iter=1\).  Consider pre-processing "
+        r"your data with StandardScaler or MinMaxScaler."
+    )
+    with pytest.warns(ConvergenceWarning, match=warning_msg):
+        sp.fit(lil_container(X), Y)
+
+
+def test_consistent_proba():
+    a = svm.SVC(probability=True, max_iter=1, random_state=0)
+    with ignore_warnings(category=ConvergenceWarning):
+        proba_1 = a.fit(X, Y).predict_proba(X)
+    a = svm.SVC(probability=True, max_iter=1, random_state=0)
+    with ignore_warnings(category=ConvergenceWarning):
+        proba_2 = a.fit(X, Y).predict_proba(X)
+    assert_allclose(proba_1, proba_2)