Fixed small error in code.

theano/tensor/extra_ops.py

@@ -4,6 +4,7 @@ import numpy
 import theano
 
 from theano.tensor import basic
+from theano.tensor import nlinalg
 
 from theano import gof, scalar
 tensor = basic

theano/tensor/nlinalg.py

@@ -703,7 +703,7 @@ def test_matrix_inverse_solve():
     assert isinstance(out.owner.op, Solve)
 
 
-class lstsq(theano.Op):
+class lstsq(Op):
     def __eq__(self, other):
         return type(self) == type(other)
 

theano/tensor/var.py

@@ -9,6 +9,7 @@ from theano.gof import Constant, Variable
 from theano.gof.utils import hashtype
 from theano.tensor.utils import hash_from_ndarray
 from theano.tensor.type import TensorType
+from theano.tensor import nlinalg
 
 
 class AsTensorError(TypeError):