Add workaround to make pylint pass until gp.predict is refactored

Author: michaelosthege

pymc3/gp/gp.py

@@ -555,6 +555,7 @@ def predict(self, Xnew, point=None, diag=False, pred_noise=False, given=None):
         mu, cov = self.predictt(Xnew, diag, pred_noise, given)
         # XXX: This needs to be refactored
         # return draw_values([mu, cov], point=point)
+        return None, None
 
     def predictt(self, Xnew, diag=False, pred_noise=False, given=None):
         R"""
@@ -1195,6 +1196,7 @@ def predict(self, Xnew, point=None, diag=False, pred_noise=False):
         mu, cov = self._build_conditional(Xnew, pred_noise, diag)
         # XXX: This needs to be refactored
         # return draw_values([mu, cov], point=point)
+        return None, None
 
     def predictt(self, Xnew, diag=False, pred_noise=False):
         R"""

pymc3/tests/test_gp.py

@@ -813,7 +813,7 @@ def testLatent2(self):
         npt.assert_allclose(latent_logp, self.logp, atol=5)
 
 
-@pytest.mark.xfail(reason="MvNormal was not yet refactored")
+@pytest.mark.xfail(reason="The `gp.predict` method was not yet refactored")
 class TestMarginalVsMarginalSparse:
     R"""
     Compare logp of models Marginal and MarginalSparse.
@@ -1114,7 +1114,7 @@ def testLatentKronRaisesSizes(self):
             gp.prior("f", Xs=[np.linspace(0, 1, 7)[:, None], np.linspace(0, 1, 5)[:, None]])
 
 
-@pytest.mark.xfail(reason="MvNormal was not yet refactored")
+@pytest.mark.xfail(reason="The `gp.predict` method was not yet refactored")
 class TestMarginalKron:
     """
     Compare gp.MarginalKron to gp.Marginal.