Fix flake8

theano/gpuarray/tests/test_elemwise.py

@@ -63,7 +63,7 @@ def test_composite_elemwise_float16():
          tensor.cast(w, 'float16') -
          tensor.constant(numpy.float16(1.0)))
 
-    f = theano.function([w, x, y], o, mode=mode_with_gpu)
+    theano.function([w, x, y], o, mode=mode_with_gpu)
 
     v = theano.tensor.vector(dtype='uint8')
     w = theano.tensor.vector(dtype='float16')
@@ -72,7 +72,7 @@ def test_composite_elemwise_float16():
     z = theano.tensor.vector(dtype='float16')
 
     o = tensor.switch(v, tensor.mul(w, x, y), z)
-    f = theano.function([v, w, x, y, z], o, mode=mode_with_gpu)
+    theano.function([v, w, x, y, z], o, mode=mode_with_gpu)
 
 
 class test_GpuDimShuffle(test_elemwise.test_DimShuffle):

theano/scalar/tests/test_basic.py

@@ -93,12 +93,8 @@ class test_composite(unittest.TestCase):
         y = float16()
         z = float16()
 
-        o = switch(v, mul(w, x, y), z)
-        cz = Composite([x, y], [tanh(x + cast(y, 'float16'))])
-        c = Composite([w, x, y], [cz(x, y) - cz(x, y)**2 +
-                                  cast(x, 'int16') + cast(x, 'float32') +
-                                  cast(w, 'float16') -
-                                  constant(np.float16(1.0))])
+        c = switch(v, mul(w, x, y), z)
+
         assert has_f16(c)
         nc = c.clone_float32()
         assert not has_f16(nc)