import argsort function into theano.tensor

theano/tensor/__init__.py

@@ -54,6 +54,6 @@ import nnet  # used for softmax, sigmoid, etc.
 from theano.gradient import Rop, Lop, grad, numeric_grad, verify_grad, \
     jacobian, hessian
 
-from theano.tensor.sort import sort
+from theano.tensor.sort import sort, argsort
 from extra_ops import (DiffOp, bincount, squeeze,
                        repeat, bartlett, fill_diagonal)