Add check for scipy version >= 0.12

theano/tensor/tests/test_basic.py

@@ -16,6 +16,7 @@ from nose.plugins.attrib import attr
 import numpy
 from numpy.testing import dec, assert_array_equal, assert_allclose
 from numpy.testing.noseclasses import KnownFailureTest
+from distutils.version import LooseVersion
 
 import theano
 from theano.compat import PY3, exc_message, operator_div
@@ -56,6 +57,7 @@ mode_no_scipy = get_default_mode()
 try:
     import scipy.special
     import scipy.stats
+    from scipy import __version__ as scipy_version
     imported_scipy_special = True
 except ImportError:
     if config.mode == "FAST_COMPILE":
@@ -1642,7 +1644,6 @@ ArctanhInplaceTester = makeBroadcastTester(
 if imported_scipy_special:
     expected_erf = scipy.special.erf
     expected_erfc = scipy.special.erfc
-    expected_erfcx = scipy.special.erfcx
     expected_erfinv = scipy.special.erfinv
     expected_erfcinv = scipy.special.erfcinv
     expected_gamma = scipy.special.gamma
@@ -1650,6 +1651,12 @@ if imported_scipy_special:
     expected_psi = scipy.special.psi
     expected_chi2sf = lambda x, df: scipy.stats.chi2.sf(x, df).astype(x.dtype)
     skip_scipy = False
+    if LooseVersion(scipy_version) >= LooseVersion("0.12.0"):
+        expected_erfcx = scipy.special.erfcx
+        skip_scipy12 = False
+    else:
+        expected_erfcx = []
+        skip_scipy12 = "the erfcx op requires scipy version >= 0.12, installed version is " + scipy_version
 else:
     expected_erf = []
     expected_erfc = []
@@ -1661,6 +1668,7 @@ else:
     expected_psi = []
     expected_chi2sf = []
     skip_scipy = "scipy is not present"
+    skip_scipy12 = "scipy is not present"
 
 ErfTester = makeBroadcastTester(
     op=tensor.erf,
@@ -1705,7 +1713,7 @@ ErfcxTester = makeBroadcastTester(
     grad=_grad_broadcast_unary_normal,
     eps=2e-10,
     mode=mode_no_scipy,
-    skip=skip_scipy)
+    skip=skip_scipy12)
 ErfcxInplaceTester = makeBroadcastTester(
     op=inplace.erfcx_inplace,
     expected=expected_erfcx,
@@ -1714,7 +1722,7 @@ ErfcxInplaceTester = makeBroadcastTester(
     eps=2e-10,
     mode=mode_no_scipy,
     inplace=True,
-    skip=skip_scipy)
+    skip=skip_scipy12)
 
 ErfinvTester = makeBroadcastTester(
     op=tensor.erfinv,