diff --git a/x2paddle/core/fluid_code.py b/x2paddle/core/fluid_code.py
index 5424abbd3ac4c8fad0f5d8487c7b640551df4d82..0d428f823d418ae64889cde9eb36f5d334a242f8 100644
--- a/x2paddle/core/fluid_code.py
+++ b/x2paddle/core/fluid_code.py
@@ -17,18 +17,46 @@ class Layer(object):
     def __init__(self):
         self.op = None
         self.param_attr = dict()
-        self.input = None
+        self.inputs = dict()
         self.output = None
-        self.str_code = None
 
     def get_code(self):
-        if self.str_code is not None:
-            return self.str_code
+        layer_code = ""
+        if self.output is not None:
+            layer_code = self.output + " = "
+        
+        layer_code = layer_code + "fluid.layers." + self.op + "("
+
+        for key, tensor in self.inputs.items():
+            layer_code = layer_code + key + "=" + tensor + ", "
+
+        for key, value in self.param_attr.items():
+            layer_code = layer_code + key + "=" + value + ", "
+        layer_code = layer_code.strip(", ")
 
+        return layer_code += ")"
 
 class FluidCode(object):
     def __init__(self):
-        self.codes = list()
+        self.layers = list()
 
-    def add_layer(self, op, input, output, param_attr=None):
-        
+    def add_layer(self, op, inputs, output, param_attr=None):
+        layer = Layer()
+        layer.op = op
+        layer.inputs = inputs
+        layer.output = output
+        if param_attr is not None:
+            layer.param_attr = param_attr
+        self.layers.append(layer)
+
+    def add_note(self, note):
+        # note should be string
+        self.layers.append(note)
+
+    def gen_codes(self):
+        codes = list()
+        for layer in self.layers:
+            if isinstance(layer, Layer):
+                codes.append(layer.get_code())
+            elif isinstance(layer, str):
+                codes.append(layer)
diff --git a/x2paddle/core/graph.py b/x2paddle/core/graph.py
index 3f28e90dd5124935f781dcfba7f20fa4fc4a8d66..21b9bef83e96f270951d9dd3f13315abd681b1b3 100644
--- a/x2paddle/core/graph.py
+++ b/x2paddle/core/graph.py
@@ -62,14 +62,16 @@ class Graph(object):
             num_inputs[name] = len(node.inputs)
 
         self.topo_sort = self.input_nodes[:]
-        for idx in range(len(self.topo_sort)):
+        while idx < len(self.topo_sort):
             current_node = self.node_map[self.topo_sort[idx]]
             for node in current_node.outputs:
                 num_inputs[node.layer_name] -= 1
                 if num_inputs[node.layer_name] == 0:
                     self.topo_sort.append(node.layer_name)
+            idx += 1
+
         for i, tmp in enumerate(self.topo_sort):
-            print(tmp)
+            print(tmp, self.node_map[tmp].layer_type, self.node_map[tmp].inputs)
 
     def get_node(self, name):
         if name not in self.node_map:
diff --git a/x2paddle/emitter/tf_emitter.py b/x2paddle/emitter/tf_emitter.py
index 3968cd112489ad584f07fd624aec8f38d7e6a2ef..0e343aed57b9ec412675ed4dc7fc8b000a03fc13 100644
--- a/x2paddle/emitter/tf_emitter.py
+++ b/x2paddle/emitter/tf_emitter.py
@@ -12,6 +12,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from x2paddle.parser import TFGraph
-
+from x2paddle.parser.tf_parser import TFGraph
+from x2paddle.core.emitter import Emitter
 
+class TFEmitter(Emitter):
+    def __init__(self):
+        super(TFEmitter, self
diff --git a/x2paddle/optimizer/tf_optimizer.py b/x2paddle/optimizer/tf_optimizer.py
index 0d45a6200dede038fc9d76d411a8e24ce7c73237..9d2775ce239e8d6516410409f2cc5a15e0a6fec9 100644
--- a/x2paddle/optimizer/tf_optimizer.py
+++ b/x2paddle/optimizer/tf_optimizer.py
@@ -13,6 +13,18 @@
 # limitations under the License.
 
 # TODO useless node remove
+from x2paddle.parser.tf_parser import TFGraph
+
+
+class TFGraphOptimizer(object):
+    def __init__(self):
+        print("Not Implement")
+        self.useless_op = [
+                'NoOp']
+
+    def remove_useless_node(self, graph):
+        for name, node in graph.node_map.items():
+            if node.layer_type in self.useless_op:
 
 # TODO identity node remove