[SciPy-Dev] ANN: SciPy 0.9.0 beta 1

Benjamin Root ben.root@ou....
Tue Dec 14 16:07:58 CST 2010


On Tue, Dec 14, 2010 at 2:09 PM, Charles R Harris <charlesr.harris@gmail.com
> wrote:

>
>
> On Tue, Dec 14, 2010 at 10:52 AM, Bruce Southey <bsouthey@gmail.com>wrote:
>
>> On Tue, Dec 14, 2010 at 10:13 AM, Ralf Gommers
>> <ralf.gommers@googlemail.com> wrote:
>> >
>> >
>> > On Wed, Dec 15, 2010 at 12:01 AM, Benjamin Root <ben.root@ou.edu>
>> wrote:
>> >>
>> >>
>> >> On Tue, Dec 14, 2010 at 6:38 AM, Ralf Gommers
>> >> <ralf.gommers@googlemail.com> wrote:
>> >>>
>> >>>
>> >>> On Tue, Dec 14, 2010 at 12:43 AM, Benjamin Root <ben.root@ou.edu>
>> wrote:
>> >>>
>> >>> Hi Ben,
>> >>>>
>> >>>> Just did a clean rebuild (after a clean rebuild of numpy) and had two
>> >>>> errors in the tests:
>> >>>
>> >>> What platform are you on?
>> >>
>> >> I reran the tests on just this scipy.misc module, here is the output:
>> >>
>> >> >>> scipy.misc.test()
>> >> Running unit tests for scipy.misc
>> >> NumPy version 2.0.0.dev-799179d
>> >> NumPy is installed in /home/bvr/Programs/numpy/numpy
>> >> SciPy version 0.10.0.dev
>> >> SciPy is installed in /home/bvr/Programs/scipy/scipy
>> >> Python version 2.6.4 (r264:75706, Jun  4 2010, 18:20:16) [GCC 4.4.4
>> >> 20100503 (Red Hat 4.4.4-2)]
>> >> nose version 0.11.3
>> >> ...........F.....
>> >> ======================================================================
>> >> FAIL: test_imresize (test_pilutil.TestPILUtil)
>> >> ----------------------------------------------------------------------
>> >> Traceback (most recent call last):
>> >>   File "/home/bvr/Programs/numpy/numpy/testing/decorators.py", line
>> 146,
>> >> in skipper_func
>> >>     return f(*args, **kwargs)
>> >>   File "/home/bvr/Programs/scipy/scipy/misc/tests/test_pilutil.py",
>> line
>> >> 28, in test_imresize
>> >>     assert_equal(im1.shape,(11,22))
>> >>   File "/home/bvr/Programs/numpy/numpy/testing/utils.py", line 251, in
>> >> assert_equal
>> >>     assert_equal(actual[k], desired[k], 'item=%r\n%s' % (k,err_msg),
>> >> verbose)
>> >>   File "/home/bvr/Programs/numpy/numpy/testing/utils.py", line 313, in
>> >> assert_equal
>> >>     raise AssertionError(msg)
>> >> AssertionError:
>> >> Items are not equal:
>> >> item=0
>> >>
>> >>  ACTUAL: 10
>> >>  DESIRED: 11
>> >>
>> >> ----------------------------------------------------------------------
>> >> Ran 17 tests in 0.089s
>> >>
>> >> FAILED (failures=1)
>> >> <nose.result.TextTestResult run=17 errors=0 failures=1>
>> >>
>> >> Note, that I am still getting this error with the suggested addition of
>> >> "np.random.seed(12345678)" to scipy/misc/tests/test_pilutil.py.  I
>> tried it
>> >> both at line 20 (before the call to class TestPILUtil) and at line 24
>> >> (before the call to np.random.random() in test_imresize.  I do not see
>> how
>> >> setting the seed value for these tests would make any difference since
>> they
>> >> are merely testing the resulting shape of the image after a resize, not
>> the
>> >> values of the resized image itself.
>> >
>> > The seeding may not matter (I haven't actually looked in detail yet),
>> but I
>> > thought I had seen this error pop up before, but not reproducibly. The
>> > imresize function does some interpolation, so the numerical values could
>> > matter. In that case seeding would help.
>> >>
>> >>
>> >>>>
>> >>>>
>> ======================================================================
>> >>>> FAIL: test_imresize (test_pilutil.TestPILUtil)
>> >>>>
>> ----------------------------------------------------------------------
>> >>>> Traceback (most recent call last):
>> >>>>   File "/home/bvr/Programs/numpy/numpy/testing/decorators.py", line
>> 146,
>> >>>> in skipper_func
>> >>>>     return f(*args, **kwargs)
>> >>>>   File "/home/bvr/Programs/scipy/scipy/misc/tests/test_pilutil.py",
>> line
>> >>>> 25, in test_imresize
>> >>>>     assert_equal(im1.shape,(11,22))
>> >>>>   File "/home/bvr/Programs/numpy/numpy/testing/utils.py", line 251,
>> in
>> >>>> assert_equal
>> >>>>     assert_equal(actual[k], desired[k], 'item=%r\n%s' % (k,err_msg),
>> >>>> verbose)
>> >>>>   File "/home/bvr/Programs/numpy/numpy/testing/utils.py", line 313,
>> in
>> >>>> assert_equal
>> >>>>     raise AssertionError(msg)
>> >>>> AssertionError:
>> >>>> Items are not equal:
>> >>>> item=0
>> >>>>
>> >>>>  ACTUAL: 10
>> >>>>  DESIRED: 11
>> >>>
>> >>> This test should be changed to use a fixed seed (add as a first line
>> of
>> >>> the test "np.random.seed(12345678)"). Can you provide one that fails?
>> >>>
>> >>
>> >> Also, I am not sure what you mean by "Can you provide one that fails?".
>> >
>> > I meant a seed value that fails. This one does, that's all we need.
>>
>> On my 64-bit linux system with Python 2.7, the error appears comes
>> from float16 dtype rather than the actual seed
>> >>> np.random.seed(12345678)
>> >>> for T in np.sctypes['float'] + [float]:
>> ...     im1 = pilutil.imresize(im,T(1.1))
>> ...     print T, im.shape, im1.shape
>> ...
>> <type 'numpy.float16'> (10, 20) (10, 21)
>> <type 'numpy.float32'> (10, 20) (11, 22)
>> <type 'numpy.float64'> (10, 20) (11, 22)
>> <type 'numpy.float128'> (10, 20) (11, 22)
>> <type 'float'> (10, 20) (11, 22)
>>
>> Here only the float16 has different shape from the rest.
>>
>>
> Ah, you compiled against numpy master instead of numpy 1.5.1, float16 is
> only in the development branch. I think the test should be fixed to use an
> explicit list of types supported by pilutil.
>
> Chuck
>
>
>
Good eye, Chuck!  That is also the case for me.  I will give the 1.5.1 build
a spin to see if the other error was also dependent on the numpy versions.

Ben Root
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