additional imports to implement jacobian/hessian

theano/tensor/tensor_grad.py

@@ -15,8 +15,8 @@ import numpy  # for numeric_grad
 
 import theano
 from theano.tensor import TensorType, TensorVariable, ones_like, \
-                zeros_like, as_tensor_variable, cast
-from theano import gradient
+                zeros_like, as_tensor_variable, cast, arange
+from theano import gradient, scan
 from theano import gof, shared
 from theano import compile