flake8

theano/compile/tests/test_mode.py

 from __future__ import absolute_import, print_function, division
+
+from nose.plugins.skip import SkipTest
+
 import theano
 from theano.compile.mode import Mode, AddFeatureOptimizer
 from theano.gof.toolbox import NoOutputFromInplace

theano/scalar/tests/test_basic_sympy.py

@@ -11,7 +11,6 @@ try:
     xs = sympy.Symbol('x')
     ys = sympy.Symbol('y')
 except ImportError:
-    from nose.plugins.skip import SkipTest
     raise SkipTest('optional package sympy disabled')
 
 xt, yt = floats('xy')