testcode for doc/library/compile/io.txt

doc/library/compile/io.txt

@@ -80,6 +80,9 @@ A non-None `value` argument makes an In() instance an optional parameter
 of the compiled function.  For example, in the following code we are
 defining an arity-2 function ``inc``.
 
+>>> import theano.tensor as T
+>>> from theano import function
+>>> from theano.compile.io import In
 >>> u, x, s = T.scalars('u', 'x', 's')
 >>> inc = function([u, In(x, value=3), In(s, update=(s+x*u), value=10.0)], [])
 
@@ -179,7 +182,7 @@ method to access values by indexing a Function directly by typing
 
 To show some examples of these access methods...
 
-.. code-block:: python
+.. testcode::
 
     a, b, c = T.scalars('xys') # set the internal names of graph nodes
     # Note that the name of c is 's', not 'c'!
@@ -221,7 +224,7 @@ Every element of the inputs list will be upgraded to an In instance if necessary
 
 Example:
 
-.. code-block:: python
+.. testcode::
 
     import theano
     from theano import tensor as T
@@ -282,7 +285,7 @@ If a single ``Variable`` or ``Out`` instance is given as argument, then the comp
 
 If a list of ``Variable`` or ``Out`` instances is given as argument, then the compiled function will return a list of their values.
 
-.. code-block:: python
+.. testcode::
 
     x, y, s = T.matrices('xys')