TST: Skip scipy NaN test on 0.17 for now

Working around #12240 which
we'll leave open until I (or someone more knowledgeable) can properly
fix these.    This skips the following tests when on scipy 0.17    -
test_nansem  - test_nanskew  - test_nankurk

Author: Tom Augspurger <[email protected]>

Closes #12243 from TomAugspurger/scipy0.17 and squashes the following commits:

af7039a [Tom Augspurger] TST: Skip scipy NaN test on 0.17 for now

Author: TomAugspurger

pandas/tests/test_nanops.py

@@ -380,6 +380,7 @@ def test_nanstd(self):
 
     def test_nansem(self):
         tm.skip_if_no_package('scipy.stats')
+        tm._skip_if_scipy_0_17()
         from scipy.stats import sem
         self.check_funs_ddof(nanops.nansem, sem, allow_complex=False,
                              allow_str=False, allow_date=False,
@@ -439,13 +440,15 @@ def _skew_kurt_wrap(self, values, axis=None, func=None):
 
     def test_nanskew(self):
         tm.skip_if_no_package('scipy.stats')
+        tm._skip_if_scipy_0_17()
         from scipy.stats import skew
         func = partial(self._skew_kurt_wrap, func=skew)
         self.check_funs(nanops.nanskew, func, allow_complex=False,
                         allow_str=False, allow_date=False, allow_tdelta=False)
 
     def test_nankurt(self):
         tm.skip_if_no_package('scipy.stats')
+        tm._skip_if_scipy_0_17()
         from scipy.stats import kurtosis
         func1 = partial(kurtosis, fisher=True)
         func = partial(self._skew_kurt_wrap, func=func1)

pandas/util/testing.py

@@ -217,6 +217,12 @@ def _skip_if_no_scipy():
         import nose
         raise nose.SkipTest('scipy.interpolate missing')
 
+def _skip_if_scipy_0_17():
+    import scipy
+    v = scipy.__version__
+    if v >= LooseVersion("0.17.0"):
+        import nose
+        raise nose.SkipTest("scipy 0.17")
 
 def _skip_if_no_pytz():
     try: