[SciPy-Dev] scipy.test() failures '0.9.0.dev6635'

[Warren Weckesser]

Warren Weckesser wrote:
> Nils Wagner wrote:
>   
>> ======================================================================
>> FAIL: test_mio.test_mat4_3d(<type 
>> 'exceptions.DeprecationWarning'>, <functools.partial 
>> object at 0x3081680
>>   
>>     
>>> , <StringIO.StringIO instance at 0x5096bd8>, {'a': array([[[ 0,  1,  2,  3],
>>>     
>>>       
>> ----------------------------------------------------------------------
>> Traceback (most recent call last):
>>    File 
>> "/home/nwagner/local/lib64/python2.6/site-packages/nose-0.11.2.dev-py2.6.egg/nose/case.py", 
>> line 18
>> 3, in runTest
>>      self.test(*self.arg)
>>    File 
>> "/home/nwagner/local/lib64/python2.6/site-packages/numpy/testing/utils.py", 
>> line 982, in assert_rai
>> ses
>>      return nose.tools.assert_raises(*args,**kwargs)
>> AssertionError: DeprecationWarning not raised
>>      if hasattr(excClass,'__name__'): 'DeprecationWarning' 
>> = excClass.'unittest'
>>      else: 'DeprecationWarning' = str(excClass)
>>   
>>     
>>>>  raise self.failureException, "%s not raised" % 'DeprecationWarning'
>>>>       
>>>>         
>> ======================================================================
>> FAIL: test_00_deprecation_warning 
>> (test_basic.TestSolveHBanded)
>> ----------------------------------------------------------------------
>> Traceback (most recent call last):
>>    File 
>> "/home/nwagner/local/lib64/python2.6/site-packages/scipy/linalg/tests/test_basic.py", 
>> line 262, in
>> test_00_deprecation_warning
>>      assert_raises(DeprecationWarning, solveh_banded, ab, 
>> b)
>>    File 
>> "/home/nwagner/local/lib64/python2.6/site-packages/numpy/testing/utils.py", 
>> line 982, in assert_rai
>> ses
>>      return nose.tools.assert_raises(*args,**kwargs)
>> AssertionError: DeprecationWarning not raised
>>      if hasattr(excClass,'__name__'): 'DeprecationWarning' 
>> = excClass.'unittest'
>>      else: 'DeprecationWarning' = str(excClass)
>>   
>>     
>>>>  raise self.failureException, "%s not raised" % 'DeprecationWarning'
>>>>       
>>>>         
>>   
>>     
>
> These two errors are failures to raise a deprecation warning.
> Does anyone else get these?
>
> I wrote the test test_00_deprecation_warning in test_basic.py,
> one of the linalg test modules.  In SciPy 0.8 and currently
> in the trunk, the function solveh_banded is supposed to
> raise a deprecation warning, because in the final release
> of 0.9, its return value will be changed.
>
> The tests for solveh_banded work for me, but they might
> be taking advantage of behavior of nose that is not
> reliable.  In effect, test_00_deprecation_warning assumes
> that will execute the first call of solveh_banded, so
> the deprecation warning will occur.  All the other test
> functions include the line
>     warnings.simplefilter('ignore', category=DeprecationWarning)
> so they ignore the warning, even if it occurs.
>
> Is there a way to reset whatever internal flag the
> warnings module has that indicates that a warning has
> already been issued once?
>   

Partially answering my own question:  in the test
where I want the warning to occur, I could use a
simplefilter to always issue deprecation warnings:

  warnings.simplefilter('always', category=DeprecationWarning)


Warren


> I see that the documentation for the warnings module
> describes a 'catch_warnings' context manager, but
> we need to be compatible with Python 2.4.  The 'with'
> statement appears in 2.5.
>
> Warren
>
>
> P.S. It looks like handling of DeprecationWarnings will
> require a little more work with Python 2.7, where they
> are ignored by default.
>
> _______________________________________________
> SciPy-Dev mailing list
> SciPy-Dev@scipy.org
> http://mail.scipy.org/mailman/listinfo/scipy-dev
>