mixed changes

theano/gpuarray/sort.py

@@ -50,10 +50,8 @@ class GpuTopKOp(GpuKernelBase, TopKOp):
     def c_header_dirs(self):
         return [os.path.dirname(__file__), pygpu.get_include()]
 
-    '''
     def c_code_cache_version(self):
         return (1,)
-    '''
 
     def gpu_kernels(self, node, nodename):
         # load kernel source

theano/tensor/sort.py

@@ -313,6 +313,10 @@ class TopKOp(theano.Op):
 
         If ``True``, one output of the Op will return the indices on the given axis.
 
+    idx_dtype: string
+        Specify output dtype, defaults to ``int64``, must be integer type.
+
+
     Notes
     -----
     - ``return_values`` and ``return_indices`` cannot be both ``False``