[SciPy-Dev] Schur decomposition test failure under Python 2.5

[Bruce Southey]

On Sat, Nov 5, 2011 at 1:40 PM, Ralf Gommers
<ralf.gommers at googlemail.com> wrote:
> Hi,
>
> There's a problem with schur(.., sort='lhp') under Python 2.5 that seems to
> be related to the Lapack function gees:
> http://projects.scipy.org/scipy/ticket/1555
>
> It would be great if someone could have a look at this for the 0.10.0
> release, but if not I'll mark it as a knownfailure because it's not a
> regression.
>
> Ralf
>
>
> _______________________________________________
> SciPy-Dev mailing list
> SciPy-Dev at scipy.org
> http://mail.scipy.org/mailman/listinfo/scipy-dev
>
>
I have only tested the RC on my 32-bit Windows install using the
provided binary.
I get the test_decomp.TestSchur and syntax error in test_distributions.py.

But buried in the test output (when run within command line Python but
not under IDLE) is this:
"capi_return is NULL
Call-back cb_dselect_in_dgees__user__routines failed."

This also appears with the current dev version under Linux.

Bruce

$ python2.5 test_decomp.py
................................................................................................................................................capi_return
is NULL
Call-back cb_dselect_in_dgees__user__routines failed.
E.....................................................................................................................................E
======================================================================
ERROR: test_sort (test_decomp.TestSchur)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/bsouthey/python/scipystuff/git/scipy/scipy/linalg/tests/test_decomp.py",
line 1498, in test_sort
    s,u,sdim = schur(a,sort='lhp')
  File "/usr/local/lib/python2.5/site-packages/scipy/linalg/decomp_schur.py",
line 118, in schur
    sort_t=sort_t)
  File "/usr/local/lib/python2.5/site-packages/scipy/linalg/decomp_schur.py",
line 106, in <lambda>
    sfunction = lambda x: (x.real < 0.0)
AttributeError: 'float' object has no attribute 'real'

======================================================================
ERROR: test_decomp.test_lapack_misaligned
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/local/lib/python2.5/site-packages/nose/case.py", line
186, in runTest
    self.test(*self.arg)
  File "/usr/local/lib/python2.5/site-packages/numpy/testing/decorators.py",
line 213, in knownfailer
    raise KnownFailureTest, msg
KnownFailureTest: Ticket #1152, triggers a segfault in rare cases.

----------------------------------------------------------------------

Windows errors:
======================================================================
ERROR: test_sort (test_decomp.TestSchur)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Python25\Lib\site-packages\scipy\linalg\tests\test_decomp.py",
line 1230, in test_sort
    s,u,sdim = schur(a,sort='lhp')
  File "C:\Python25\Lib\site-packages\scipy\linalg\decomp_schur.py",
line 118, in schur
    sort_t=sort_t)
  File "C:\Python25\Lib\site-packages\scipy\linalg\decomp_schur.py",
line 106, in <lambda>
    sfunction = lambda x: (x.real < 0.0)
AttributeError: 'float' object has no attribute 'real'

======================================================================
ERROR: Failure: SyntaxError (invalid syntax (test_distributions.py, line 739))
----------------------------------------------------------------------
Traceback (most recent call last):
  File "c:\python25\lib\site-packages\nose-1.1.2-py2.5.egg\nose\loader.py",
line 390, in loadTestsFromName
    addr.filename, addr.module)
  File "c:\python25\lib\site-packages\nose-1.1.2-py2.5.egg\nose\importer.py",
line 39, in importFromPath
    return self.importFromDir(dir_path, fqname)
  File "c:\python25\lib\site-packages\nose-1.1.2-py2.5.egg\nose\importer.py",
line 86, in importFromDir
    mod = load_module(part_fqname, fh, filename, desc)
  File "C:\Python25\lib\site-packages\scipy\stats\tests\test_distributions.py",
line 739
    x = stats.lognorm.rvs(*true, size=100)
                                    ^
SyntaxError: invalid syntax

----------------------------------------------------------------------