fix kliep + add test rtgp

Author: antoinedemathelin

adapt/instance_based/_kliep.py

@@ -221,7 +221,7 @@ def __init__(self,
                  max_centers=100,
                  cv=5,
                  algo="FW",
-                 lr=np.logspace(-3,1,5),
+                 lr=[0.001, 0.01, 0.1, 1.0, 10.0],
                  tol=1e-6,
                  max_iter=2000,
                  copy=True,

tests/test_regular.py

@@ -225,4 +225,17 @@ def test_regulargp_classif():
     tgt_model = RegularTransferGP(src_model, lambda_=1.)
     tgt_model.fit(Xt[:3], yt[:3])
     score2 = tgt_model.score(Xt, yt)
+    assert score1 < score2
+    
+
+def test_regulargp_multi_classif():
+    Xs, ys, Xt, yt = make_classification_da()
+    ys[:5] = 3
+    kernel = Matern() + WhiteKernel()
+    src_model = GaussianProcessClassifier(kernel)
+    src_model.fit(Xs, ys)
+    score1 = src_model.score(Xt, yt)
+    tgt_model = RegularTransferGP(src_model, lambda_=1.)
+    tgt_model.fit(Xt[:3], yt[:3])
+    score2 = tgt_model.score(Xt, yt)
     assert score1 < score2