fixed grad tests

_test_gradient.py

@@ -16,7 +16,7 @@ class _test_grad_sources_inputs(unittest.TestCase):
             def __init__(self, arg):
                 self.inputs = [gof.result.ResultBase()]
                 self.outputs = [gof.result.ResultBase()]
-            def grad(self, x, gz):
+            def grad(self, (x, ), (gz, )):
                 pass
         a = retNone(5)
         try:
@@ -31,7 +31,7 @@ class _test_grad_sources_inputs(unittest.TestCase):
             def __init__(self, arg):
                 self.inputs = arg
                 self.outputs = [gof.result.ResultBase()]
-            def grad(self, x, gz):
+            def grad(self, (x, ), (gz, )):
                 return [None]
         i = gof.result.ResultBase()
         a = retNone([i])
@@ -44,7 +44,7 @@ class _test_grad_sources_inputs(unittest.TestCase):
             def __init__(self, arg):
                 self.inputs = arg
                 self.outputs = [gof.result.ResultBase()]
-            def grad(self, inputs, gz):
+            def grad(self, inputs, (gz, )):
                 return [None]
 
         i = gof.result.ResultBase()
@@ -67,7 +67,7 @@ class _test_grad_sources_inputs(unittest.TestCase):
                 self.inputs = arg
                 self.outputs = [gof.result.ResultBase()]
                 self.tst = tst
-            def grad(self, inputs, gz):
+            def grad(self, inputs, (gz, )):
                 self.tst.fail()
 
         i = gof.result.ResultBase()
@@ -81,8 +81,8 @@ class _test_grad_sources_inputs(unittest.TestCase):
             def __init__(self):
                 self.inputs = [gof.result.ResultBase()]
                 self.outputs = [gof.result.ResultBase()]
-            def grad(self, x, gz):
-                return gval
+            def grad(self, (x, ), (gz, )):
+                return gval,
         a1 = O()
         g = grad_sources_inputs([(a1.outputs[0], 1)], None)
         self.failUnless(g[a1.inputs[0]] is gval)
@@ -94,8 +94,8 @@ class _test_grad_sources_inputs(unittest.TestCase):
             def __init__(self):
                 self.inputs = [gof.result.ResultBase()]
                 self.outputs = [gof.result.ResultBase(),gof.result.ResultBase()]
-            def grad(self, x, (gz1, gz2)):
-                return gval
+            def grad(self, (x, ), (gz1, gz2)):
+                return gval,
         a1 = O()
         g = grad_sources_inputs([(a1.outputs[0], 1)], None)
         self.failUnless(g[a1.inputs[0]] is gval)
@@ -107,7 +107,7 @@ class _test_grad_sources_inputs(unittest.TestCase):
             def __init__(self):
                 self.inputs = [gof.result.ResultBase(),gof.result.ResultBase()]
                 self.outputs = [gof.result.ResultBase()]
-            def grad(self, (x0,x1), gz):
+            def grad(self, (x0,x1), (gz, )):
                 return (gval0, gval1)
         a1 = O()
         g = grad_sources_inputs([(a1.outputs[0], 1)], None)