flake8 and skip test if no scipy

theano/scalar/basic_scipy.py

@@ -27,6 +27,7 @@ except (ImportError, ValueError):
 
 class Erf(UnaryScalarOp):
     nfunc_spec = ('scipy.special.erf', 1, 1)
+
     def impl(self, x):
         if imported_scipy_special:
             return scipy.special.erf(x)
@@ -146,6 +147,7 @@ class Erfinv(UnaryScalarOp):
     (TODO) Find a C implementation of erfinv for CPU.
     """
     nfunc_spec = ('scipy.special.erfinv', 1, 1)
+
     def impl(self, x):
         if imported_scipy_special:
             return scipy.special.erfinv(x)

theano/tensor/tests/test_basic.py

@@ -2017,7 +2017,8 @@ def test_verify_jv_grad():
     # Verify Jv gradient.
     # Implemented separately due to need to fix first input for which grad is
     # not defined.
-
+    if skip_scipy:
+        raise SkipTest("SciPy needed")
     v_val, x_val = _grad_broadcast_binary_bessel['normal']
 
     def fixed_first_input_jv(x):
@@ -2084,6 +2085,8 @@ def test_verify_iv_grad():
     # Verify Iv gradient.
     # Implemented separately due to need to fix first input for which grad is
     # not defined.
+    if skip_scipy:
+        raise SkipTest("SciPy needed")
 
     v_val, x_val = _grad_broadcast_binary_bessel['normal']