test_boxplot catche DeprecationWarning on jessie with python 3.4

[yarikoptic]

======================================================================
FAIL: test_boxplot (pandas.tests.test_graphics.TestDataFramePlots)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/buildd/pandas-0.15.0/debian/tmp/usr/lib/python3/dist-packages/pandas/tests/test_graphics.py", line 1821, in test_boxplot
    subplots=True, logy=True)
  File "/usr/lib/python3.4/contextlib.py", line 66, in __exit__
    next(self.gen)
  File "/tmp/buildd/pandas-0.15.0/debian/tmp/usr/lib/python3/dist-packages/pandas/util/testing.py", line 1627, in assert_produces_warning
    % extra_warnings)
AssertionError: Caused unexpected warning(s): ['DeprecationWarning'].

python3.4 ci/print_versions.py; \
    cd build/; xvfb-run -a -s "-screen 0 1280x1024x24 -noreset" \
      python3.4 /usr/bin/nosetests -s -v -A 'not network and not disabled' --exclude test_bar_log  pandas;

INSTALLED VERSIONS
------------------
commit: None
python: 3.4.2.final.0
python-bits: 64
OS: Linux
OS-release: 3.2.0-4-amd64
machine: x86_64
processor: 
byteorder: little
LC_ALL: C
LANG: C

pandas: 0.15.0
nose: 1.3.4
Cython: 0.20.1post0
numpy: 1.8.2
scipy: 0.14.0
statsmodels: None
IPython: None
sphinx: 1.2.3
patsy: None
dateutil: 2.0
pytz: 2012c
bottleneck: None
tables: None
numexpr: None
matplotlib: 1.3.1
openpyxl: None
xlrd: None
xlwt: None
xlsxwriter: None
lxml: None
bs4: 4.3.2
html5lib: None
httplib2: None
apiclient: None
rpy2: None
sqlalchemy: None
pymysql: None
psycopg2: None

[jreback]

@TomAugspurger can you repro this?

[TomAugspurger]

Wasn't able to reproduce. Let me set up an env with mpl 1.3, but I'm not sure why that would matter.

Oh, actually it might matter if matplotlib is the one producing the DeprecationWarning.

[TomAugspurger]

OK... able to reproduce kind of. The test fails with an uncaught DeprecationWarning, but when I step through in the interpreter I don't get a DeprecationWarning. I'll keep digging.

[yarikoptic]

how well digging ended up @TomAugspurger ? ;-)

[tacaswell]

I can't reproduce this with pandas master + mpl 1.4.2 from conda.

I looked at the code briefly and grew confused by the wall of indirection and objects, can you point me to where it is raising from?

[yarikoptic]

(Pdb) print([(w_.category, w_.filename, w_.lineno, w_.line, w_.message) for w_ in w if w_.category.__name__ == 'DeprecationWarning'])
[(<class 'DeprecationWarning'>, '/usr/lib/python3/dist-packages/matplotlib/backends/backend_agg.py', 517, None, DeprecationWarning('npy_PyFile_Dup is deprecated, use npy_PyFile_Dup2',))]

you are welcome

[tacaswell]

Ah, sorry, I was confused before. This only shows up on 1.3.1, but not 1.4.2 or master?

@sandrotosi was trying to get 1.4.2 into jessie, at it is someplace along the pipeline https://buildd.debian.org/status/package.php?p=matplotlib

[yarikoptic]

Now that jessie is frozen there is no guarantee that 1.4.2 would get into jessie :-/

[yarikoptic]

and yes -- that was a jessie-only problem iirc

[sandrotosi]

I submitted an unblock for mpl before the freeze, hopefully it will make it (finger crossed)

[yarikoptic]

just an update that issue persists and unfortunately mpl 1.4 didn't make it to jessie (yet at least)

[jreback]

This build is now in master: https://travis-ci.org/jreback/pandas/jobs/42937609

it will run the slow tests on 3.4 (this does not show up on 2.7)

@TomAugspurger have a look?

[jreback]

skipped here: 80a730c