fix errors

python/paddle/v2/fluid/layers/nn.py

@@ -386,7 +386,8 @@ def square_error_cost(input, label, **kwargs):
 
     square_out = helper.create_tmp_variable(dtype=input.dtype)
     helper.append_op(
-        type='square', inputs={'X': [minus_out]}, outputs={'Y': [square_out]})
+        type='square', inputs={'X': [minus_out]},
+        outputs={'Out': [square_out]})
     return square_out
 
 

python/paddle/v2/fluid/tests/test_net.py

@@ -7,7 +7,7 @@ def fc(X, W, Y):
     ret_v = core.Net.create()
 
     ret_v.append_op(Operator("mul", X="X", Y="W", Out="pre_activation"))
-    ret_v.append_op(Operator("sigmoid", X="pre_activation", Y=Y))
+    ret_v.append_op(Operator("sigmoid", X="pre_activation", Out=Y))
     ret_v.complete_add_op(True)
     return ret_v
 
@@ -30,7 +30,7 @@ Op(plain_net), inputs:{all[W, X, Y]}, outputs:{all[Out, fc.out, pre_activation]}
     Op(plain_net), inputs:{all[W, X]}, outputs:{all[fc.out, pre_activation]}.
         Op(plain_net), inputs:{all[W, X]}, outputs:{all[fc.out, pre_activation]}.
             Op(mul), inputs:{X[X], Y[W]}, outputs:{Out[pre_activation]}.
-            Op(sigmoid), inputs:{X[pre_activation]}, outputs:{Y[fc.out]}.
+            Op(sigmoid), inputs:{X[pre_activation]}, outputs:{Out[fc.out]}.
 '''
         self.assertEqual(expected, "\n" + str(net))