Factor scan_nodes_from_fct() out of T_Scan

theano/scan_module/tests/test_scan.py

@@ -203,17 +203,18 @@ def grab_scan_node(output):
         return rval
 
 
+def scan_nodes_from_fct(fct):
+    nodes = fct.maker.fgraph.toposort()
+    scan_nodes = [n for n in nodes if isinstance(n.op, Scan)]
+    return scan_nodes
+
+
 class T_Scan(unittest.TestCase):
 
     def setUp(self):
         utt.seed_rng()
         super(T_Scan, self).setUp()
 
-    def scan_nodes_from_fct(self, fct):
-        nodes = fct.maker.fgraph.toposort()
-        scan_nodes = [n for n in nodes if isinstance(n.op, Scan)]
-        return scan_nodes
-
     # generator network, only one output , type scalar ; no sequence or
     # non sequence arguments
     @dec.knownfailureif(
@@ -4261,7 +4262,7 @@ class T_Scan(unittest.TestCase):
             f = theano.function([W, v], out, mode=mode_with_opt)
             f(numpy.zeros((3, 3), dtype=theano.config.floatX), [1, 2])
 
-            scan_nodes = self.scan_nodes_from_fct(f)
+            scan_nodes = scan_nodes_from_fct(f)
             assert len(scan_nodes) == 1
             scan_node = scan_nodes[0]
 
@@ -4305,7 +4306,7 @@ class T_Scan(unittest.TestCase):
               [1, 2],
               numpy.zeros((3, 3), theano.config.floatX))
 
-            scan_nodes = self.scan_nodes_from_fct(f)
+            scan_nodes = scan_nodes_from_fct(f)
             assert len(scan_nodes) == 1
             scan_node = scan_nodes[0]