PEP8/readability.

theano/tensor/basic.py

@@ -5339,19 +5339,18 @@ class TensorDotGrad(Op):
     def perform(self, node, inp, out):
         x, y, gz = inp
         gx, gy = out
-
         sum_over_y = range(y.ndim)
         [sum_over_y.remove(q) for q in self.axes[1]]
         sum_over_x = range(x.ndim)
         [sum_over_x.remove(q) for q in self.axes[0]]
-
-        _gx = numpy.tensordot(gz, y, [range(x.ndim-len(self.axes[0]),gz.ndim), sum_over_y])
+        tdot_axes = [range(x.ndim - len(self.axes[0]), gz.ndim), sum_over_y]
+        _gx = numpy.tensordot(gz, y, tdot_axes)
         idx = numpy.hstack((sum_over_x, self.axes[0]))
         newshapex = numpy.zeros(x.ndim)
         newshapex[[newpos for newpos in idx]] = [i for i in xrange(x.ndim)]
         gx[0] = numpy.transpose(_gx, newshapex)
-
-        _gy = numpy.tensordot(x, gz, [sum_over_x, range(x.ndim-len(self.axes[0]))])
+        tdot_axes = [sum_over_x, range(x.ndim - len(self.axes[0]))]
+        _gy = numpy.tensordot(x, gz, tdot_axes)
         idy = numpy.hstack((self.axes[1], sum_over_y))
         newshapey = numpy.zeros(y.ndim)
         newshapey[[newpos for newpos in idy]] = [i for i in xrange(y.ndim)]