test_SparseGPRegression_rbf_white_kern_1d test failure on powerpc64le arch

[Apteryks]

Hello,

Found by GNU Guix CI (https://ci.guix.gnu.org/build/2921270/)

[...]
test_SparseGPRegression_rbf_white_kern_1d (GPy.testing.model_tests.GradientTests)
Testing the sparse GP regression with rbf kernel with white kernel on 1d data ... initializing Y
initializing inference method
adding kernel and likelihood as parameters
Adding Z as parameter
FAIL
[...]

======================================================================
FAIL: test_SparseGPRegression_rbf_white_kern_1d (GPy.testing.model_tests.GradientTests)
Testing the sparse GP regression with rbf kernel with white kernel on 1d data
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/guix-build-python-gpy-1.10.0.drv-0/GPy-1.10.0/GPy/testing/model_tests.py", line 788, in test_SparseGPRegression_rbf_white_kern_1d
    self.check_model(rbf, model_type='SparseGPRegression', dimension=1)
  File "/tmp/guix-build-python-gpy-1.10.0.drv-0/GPy-1.10.0/GPy/testing/model_tests.py", line 682, in check_model
    self.assertTrue(m.checkgrad())
AssertionError: False is not true

----------------------------------------------------------------------
Ran 274 tests in 466.921s

FAILED (failures=1, skipped=3)

Thanks!

[MartinBubel]

Hi @Apteryks
could you please retry using GPy==1.13.1? Tests have been migrated from nose to pytest and some things have changed.

[Apteryks]

Hi! I just tried updating GPy to version 1.13.1, and I'm getting a syntax error in the mpi_test__.py file which seemingly uses Python 2 syntax:

testing/mpi_test__.py'...
***   File "/gnu/store/7gyd40a2zchj2j1s796v5393laxpvr9l-python-gpy-1.13.1/lib/python3.10/site-packages/GPy/testing/mpi_test__.py", line 16
    print float(m.objective_function())
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print(...)?

Any tip?

[MartinBubel]

Clearly, this is a something I overlooked when modernizing the tests.
I am a little confused why CI testing did not run into this 🤔 but anyways, thanks for reporting! I'll open up a branch on this one.

[MartinBubel]

@Apteryks I am not sure how you are running the tests. Is there any way you can test if branch 1054-test_sparsegpregression_rbf_white_kern_1d-test-failure-on-powerpc64le-arch fixes this?