Merge pull request #2 from PaddlePaddle/develop

add onnx

README.md

@@ -12,7 +12,7 @@ paddlepaddle >= 1.5.0
 **以下依赖只需对应安装自己需要的即可**  
 转换tensorflow模型 ： tensorflow == 1.14.0  
 转换caffe模型 ： caffe == 1.0.0  
-
+转换onnx模型 ： onnx == 1.5.0  pytorch == 1.1.0
 ## 安装
 ```
 pip install x2paddle
@@ -32,8 +32,9 @@ x2paddle --framework=tensorflow --model=tf_model.pb --save_dir=pd_model
 x2paddle --framework=caffe --prototxt=deploy.proto --weight=deploy.caffemodel --save_dir=pd_model
 ```
 ### ONNX
-即将release，目前仍可使用[onnx2fluid](https://github.com/PaddlePaddle/X2Paddle/tree/release-0.3/onnx2fluid)
-
+```
+x2paddle --framework=onnx --model=onnx_model.onnx --save_dir=pd_model
+```
 ### 参数选项
 | 参数 | |
 |----------|--------------|
@@ -42,7 +43,7 @@ x2paddle --framework=caffe --prototxt=deploy.proto --weight=deploy.caffemodel --
 |--weight | 当framework为caffe时，该参数指定caffe模型的参数文件路径 |
 |--save_dir | 指定转换后的模型保存目录路径 |
 |--model | 当framework为tensorflow时，该参数指定tensorflow的pb模型文件路径 |
-|--caffe_proto | [可选]由caffe.proto编译成caffe_pb2.py文件的存放路径，当没有安装caffe或者使用自定义Layer时使用，默认为None |
+|--caffe_proto | [可选]由caffe.proto编译成caffe_pb2.py文件的存放路径，当存在自定义Layer时使用，默认为None |
 
 ## 使用转换后的模型
 转换后的模型包括`model_with_code`和`inference_model`两个目录。  

x2paddle/convert.py

@@ -15,7 +15,6 @@
 from six import text_type as _text_type
 import argparse
 import sys
-import x2paddle
 
 
 def arg_parser():
@@ -104,9 +103,32 @@ def caffe2paddle(proto, weight, save_dir, caffe_proto):
     mapper.save_inference_model(save_dir)
 
 
+def onnx2paddle(model_path, save_dir):
+    # check onnx installation and version
+    try:
+        import onnx
+        version = onnx.version.version
+        if version != '1.5.0':
+            print("onnx==1.5.0 is required")
+            return
+    except:
+        print("onnx is not installed, use \"pip install onnx==1.5.0\".")
+        return
+
+    from x2paddle.decoder.onnx_decoder import ONNXDecoder
+    from x2paddle.op_mapper.onnx_op_mapper import ONNXOpMapper
+    from x2paddle.optimizer.onnx_optimizer import ONNXOptimizer
+    print("Now translating model from onnx to paddle.")
+    model = ONNXDecoder(model_path)
+    mapper = ONNXOpMapper(model)
+    optimizer = ONNXOptimizer(mapper)
+    optimizer.delete_redundance_code()
+    mapper.save_inference_model(save_dir)
+
+
 def main():
     if len(sys.argv) < 2:
-        print("Use \"x2paddle -h\" to print the help information\n")
+        print("Use \"x2paddle -h\" to print the help information")
         return
 
     parser = arg_parser()
@@ -124,7 +146,6 @@ def main():
             return
     except:
         print("paddlepaddle not installed, use \"pip install paddlepaddle\"")
-
     assert args.framework is not None, "--from is not defined(tensorflow/caffe)"
     assert args.save_dir is not None, "--save_dir is not defined"
 
@@ -136,9 +157,11 @@ def main():
         assert args.prototxt is not None and args.weight is not None, "--prototxt and --weight should be defined while translating caffe model"
         caffe2paddle(args.prototxt, args.weight, args.save_dir,
                      args.caffe_proto)
-
+    elif args.framework == "onnx":
+        assert args.model is not None, "--model should be defined while translating onnx model"
+        onnx2paddle(args.model, args.save_dir)
     else:
-        raise Exception("--framework only support tensorflow/caffe now")
+        raise Exception("--framework only support tensorflow/caffe/onnx now")
 
 
 if __name__ == "__main__":

x2paddle/decoder/onnx_decoder.py

+#   Copyright (c) 2019  PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from x2paddle.core.graph import GraphNode, Graph
+from x2paddle.core.fluid_code import FluidCode
+from onnx.checker import ValidationError
+from onnx.checker import check_model
+from onnx.utils import polish_model
+from onnx.version_converter import convert_version
+from onnx import helper
+from onnx.helper import get_attribute_value, make_attribute
+from onnx.shape_inference import infer_shapes
+from onnx.mapping import TENSOR_TYPE_TO_NP_TYPE
+from onnx.numpy_helper import to_array
+from collections import OrderedDict as Dict
+import onnx
+import numpy as np
+from copy import deepcopy
+import logging as _logging
+
+default_op_domain = 'ai.onnx'
+_logger = _logging.getLogger(__name__)
+
+
+class ONNXGraphNode(GraphNode):
+    def __init__(self, layer, layer_name=None):
+        if layer_name is None:
+            super(ONNXGraphNode, self).__init__(layer, layer.name)
+        else:
+            super(ONNXGraphNode, self).__init__(layer, layer_name)
+        self.layer_type = layer.op_type
+        self.fluid_code = FluidCode()
+        self.attr_map = self.get_attr_map()
+        self.dtype_map = {1: "float32", 3: "int32", 9: "int64"}
+        self.weight_inputs = list()
+        self.out_shapes = None
+        self.dtype = None
+
+    def get_attr_map(self):
+        """
+        convert ONNX node attributes to dict
+        """
+        return {
+            attr.name: self.get_attribute_value2(attr)
+            for attr in self.layer.attribute
+        }
+
+    @property
+    def value(self):
+        assert 'Constant' in self.layer_type, "Only Constant node has value."
+
+        attr = self.layer.attr['value']
+        if 'value' in self.attr_map:
+            return default
+        return self.attr_map[name]
+
+    def get_attribute_value2(self, attr):
+        """
+        get_attribute_value enhanced
+        """
+        if attr.type == onnx.AttributeProto.TENSOR:
+            dtype = np.dtype(TENSOR_TYPE_TO_NP_TYPE[attr.t.data_type])
+            data = attr.t.raw_data
+            value = np.frombuffer(data,
+                                  dtype=dtype,
+                                  count=(len(data) // dtype.itemsize))
+        elif attr.type == onnx.AttributeProto.STRING:
+            value = attr.s
+            value = value.decode() if isinstance(value, bytes) else value
+        else:
+            value = get_attribute_value(attr)
+        return value
+
+    def get_attr(self, name, default=None):
+        """
+        get_attribute_value from attr_map
+        """
+        if name not in self.attr_map:
+            return default
+        return self.attr_map[name]
+
+
+class ONNXGraphDataNode(GraphNode):
+    def __init__(self, layer, layer_name=None, is_global_input=False):
+        if layer_name is None:
+            super(ONNXGraphDataNode, self).__init__(layer, layer.name)
+        else:
+            super(ONNXGraphDataNode, self).__init__(layer, layer_name)
+        if is_global_input:
+            self.layer_type = 'place_holder'
+        else:
+            self.layer_type = 'create_parameter'
+        self.layer_name = layer_name
+        self.fluid_code = FluidCode()
+        self.weight = None
+        self.embeded_as = None
+
+    @property
+    def out_shapes(self):
+        values = self.layer.type.tensor_type.shape.dim
+        out_shapes = list()
+        out_shapes = [dim.dim_value for dim in values]
+        return out_shapes
+
+    @property
+    def dtype(self):
+        dtype = self.layer.type.tensor_type.elem_type
+
+        return TENSOR_TYPE_TO_NP_TYPE[dtype]
+
+
+class ONNXGraph(Graph):
+    def __init__(self, model):
+        super(ONNXGraph, self).__init__(model)
+        self.initializer = {}
+        self.place_holder_nodes = list()
+        self.get_place_holder_nodes()
+
+    def get_inner_nodes(self):
+        """
+        generate inner node of ONNX model
+        """
+        inner_nodes = []
+        if not isinstance(self.model, onnx.GraphProto):
+            logger.error('graph is not a GraphProto instance')
+            return
+        for initializer in self.model.initializer:
+            name = initializer.name
+            inner_nodes.append(name)
+        return inner_nodes
+
+    def get_place_holder_nodes(self):
+        """
+        generate place_holder node of ONNX model
+        """
+        inner_nodes = self.get_inner_nodes()
+        input_nodes = [value.name for value in self.model.input]
+        for ipt_data in input_nodes:
+            if ipt_data not in inner_nodes:
+                self.place_holder_nodes.append(ipt_data)
+
+    def is_place_holder_nodes(self, layer):
+        """
+        return layer is or not place_holder node
+        """
+        if layer in self.place_holder_nodes:
+            return True
+        return False
+
+    def build(self):
+        """
+        build topo_sort of ONNX model
+        """
+        for layer in self.model.node:
+            self.node_map[layer.name] = ONNXGraphNode(layer)
+
+        #set op node's dtype and out_shapes
+        for item in self.model.value_info:
+            if item.name in self.node_map:
+                self.node_map[item.name].dtype = TENSOR_TYPE_TO_NP_TYPE[
+                    item.type.tensor_type.elem_type]
+                self.node_map[item.name].out_shapes = [
+                    dim.dim_value for dim in item.type.tensor_type.shape.dim
+                ]
+
+        for layer in self.model.input:
+            if layer.name not in self.node_map:
+                is_place_holder = self.is_place_holder_nodes(layer.name)
+                self.node_map[layer.name] = ONNXGraphDataNode(
+                    layer,
+                    layer_name=layer.name,
+                    is_global_input=is_place_holder)
+        #set data node's weight
+        for name, weight in self.graph_weights(self.model):
+            if name in self.node_map:
+                if isinstance(self.node_map[name], ONNXGraphDataNode):
+                    self.node_map[name].weight = weight
+                    self.node_map[name].embeded_as = []
+
+        #generate connection between nodes for topo
+        for layer_name, node in self.node_map.items():
+            if isinstance(node, ONNXGraphNode):
+                for idx, in_node in enumerate(node.layer.input):
+                    if in_node not in self.node_map:
+                        raise Exception(
+                            'input[{}] of node[{}] does not exist in node_map'.
+                            format(in_node, layer_name))
+                    else:
+                        self.connect(in_node, layer_name)
+
+        #generate topo
+        super(ONNXGraph, self).build()
+
+        self.input_nodes = self.place_holder_nodes
+
+    def get_nodes(self, names, copy=False):
+        """
+        get nodes by more than one name
+        """
+        nodes = []
+        for name in names:
+            nodes.add(self.get_node(name, copy=copy))
+
+    def graph_weights(self, graph):
+        """
+        generator for weights
+        """
+
+        if not isinstance(graph, onnx.GraphProto):
+            logger.error('graph is not a GraphProto instance')
+            return
+
+        for initializer in graph.initializer:
+            name = initializer.name
+            weight = to_array(initializer)
+            yield name, weight
+
+
+class ONNXDecoder(object):
+    def __init__(self, onnx_model):
+        model = onnx.load(onnx_model)
+        print('model ir_version: {}, op version: {}'.format(
+            model.ir_version, model.opset_import[0].version))
+
+        if model.opset_import[0].version < 9:
+            _logger.warning(
+                'Now, onnx2paddle main support convert onnx model opset_verison == 9,'
+                'opset_verison of your onnx model is %d < 9,'
+                'some operator may cannot convert.',
+                model.opset_import[0].version)
+        check_model(model)
+
+        model = polish_model(model)
+
+        model = self.optimize_model_skip_op_for_inference(model)
+        model = self.optimize_model_strip_initializer(model)
+        self.standardize_variable_name(model.graph)
+
+        self.model = model
+        graph_def = model.graph
+
+        self.onnx_graph = ONNXGraph(graph_def)
+        self.onnx_graph.build()
+
+    def build_value_refs(self, nodes):
+        """
+        build op reference of inputs and outputs
+        """
+        input_refs = Dict()
+        output_refs = Dict()
+        for idx, node in enumerate(nodes):
+            for val_name in node.input:
+                input_refs.setdefault(val_name, set()).add(idx)
+            for val_name in node.output:
+                output_refs.setdefault(val_name, set()).add(idx)
+        return input_refs, output_refs
+
+    def skip_node_forward(self, nodes, src_output_name, dst_input_name,
+                          input_refs):
+        """
+        skip nodes between src_output_name -> dst_input_name and connect this pair
+        """
+        processed = 0
+        for next_idx in input_refs[src_output_name]:
+            next_node = nodes[next_idx]
+            for val_idx, next_input_name in enumerate(next_node.input):
+                if next_input_name == src_output_name:
+                    next_node.input[val_idx] = dst_input_name
+                    processed += 1
+        return processed
+
+    def skip_node_backward(self, nodes, src_input_name, dst_output_name,
+                           output_refs):
+        """
+        skip nodes between dst_output_name -> src_input_name and connect this pair
+        """
+        processed = 0
+        for prev_idx in output_refs[src_input_name]:
+            prev_node = nodes[prev_idx]
+            for val_idx, prev_output_name in enumerate(prev_node.output):
+                if prev_output_name == src_input_name:
+                    prev_node.output[val_idx] = dst_output_name
+                    processed += 1
+        return processed
+
+    def optimize_model_skip_op_for_inference(self, model, op_list=None):
+        """
+        skip ops can be bypassed for inference
+        """
+        if op_list is None:
+            op_list = ['Dropout']
+
+        nodes = model.graph.node
+        input_refs, output_refs = self.build_value_refs(nodes)
+        ret = type(model)()
+        ret.CopyFrom(model)
+        ret_nodes = ret.graph.node
+        nodes_to_remove = []
+        for node_idx, node in enumerate(nodes):
+            if not (node.domain == default_op_domain or node.domain == ''):
+                continue
+            op_type = node.op_type
+            if not (op_type in op_list):
+                continue
+            if op_type in ['Dropout']:
+                input_name = node.input[0]
+                output_name = node.output[0]
+            elif not (len(node.input) == 1 and len(node.output) == 1):
+                print(
+                    'currently only 1-input-1-output op supported, skip required %d: %s',
+                    node_idx, node.op_type)
+                continue
+            else:
+                input_name = node.input[0]
+                output_name = node.output[0]
+
+            if output_name in input_refs:
+                processed = self.skip_node_forward(ret_nodes, output_name,
+                                                   input_name, input_refs)
+            elif input_name in output_refs:
+                processed = self.skip_node_backward(ret_nodes, input_name,
+                                                    output_name, output_refs)
+            else:
+                processed = -1
+
+            if processed > 0:
+                nodes_to_remove.append(node_idx)
+                print('skip op {}: {} -> {} -> {}'.format(
+                    node_idx, input_name, node.op_type, output_name))
+            elif processed == 0:
+                print('weird, no node processed')
+            else:
+                print('standalone op {}: {} -> {} -> {} not skipped'.format(
+                    node_idx, input_name, node.op_type, output_name))
+
+        nodes_to_remove.sort(reverse=True)
+        for node_idx in nodes_to_remove:
+            ret_nodes.pop(node_idx)
+        return ret
+
+    def optimize_model_strip_initializer(self, model, keep_input_only=True):
+        """
+        strip weights for inference
+        """
+        nodes = model.graph.node
+        input_refs, output_refs = self.build_value_refs(nodes)
+        out_names = [val.name for val in model.graph.output]
+
+        ret = type(model)()
+        ret.CopyFrom(model)
+        # strip initializers
+        ret.graph.ClearField('initializer')
+        ret_initializers = ret.graph.initializer
+        for initializer in model.graph.initializer:
+            name = initializer.name
+            if name in input_refs:
+                ret_initializers.add().CopyFrom(initializer)
+            elif not keep_input_only and name in output_refs:
+                ret_initializers.add().CopyFrom(initializer)
+            else:
+                dtype = TENSOR_TYPE_TO_NP_TYPE[initializer.data_type]
+
+        # strip inputs
+        ret.graph.ClearField('input')
+        ret_inputs = ret.graph.input
+        for item in model.graph.input:
+            name = item.name
+            if name in input_refs or name in out_names:
+                ret_inputs.add().CopyFrom(item)
+        return ret
+
+    def make_variable_name(self, name):
+        """
+        make a valid code name for ParamAttr
+        """
+
+        if name == '':
+            raise ValueError('name should not be empty')
+        for s in ' .*?\\/-:':  #
+            name = name.replace(s, '_')
+        return '_' + name
+
+    def standardize_variable_name(self, graph):
+        """
+        standardize variable name for paddle's code
+        """
+
+        for initializer in graph.initializer:
+            initializer.name = self.make_variable_name(initializer.name)
+        for ipt in graph.input:
+            ipt.name = self.make_variable_name(ipt.name)
+        for output in graph.output:
+            output.name = self.make_variable_name(output.name)
+        for item in graph.value_info:
+            item.name = self.make_variable_name(item.name)
+        for node in graph.node:
+            if node.name == '':
+                node.name = node.output[0]
+            node.name = self.make_variable_name(node.name)
+            for i in range(len(node.input)):
+                node.input[i] = self.make_variable_name(node.input[i])
+            for i in range(len(node.output)):
+                node.output[i] = self.make_variable_name(node.output[i])
+
+    def split_model(self, model, outputs=None):
+        """
+        Takes a model and changes its outputs.
+        """
+        if outputs is None:
+            raise RuntimeError("outputs is None")
+        if outputs == model.graph.output[0].name:
+            return model
+        nodes = model.graph.node
+        keep_nodes = []
+
+        # all the nodes we need to keep.
+        for node in nodes:
+            if outputs in node.output:
+                keep_nodes.append(node)
+                break
+            keep_nodes.append(node)
+
+        infer_shapes = onnx.shape_inference.infer_shapes(model)
+
+        var_out = []
+        for value_info in infer_shapes.graph.value_info:
+            if value_info.name == outputs:
+                var_out.append(value_info)
+                break
+
+        graph = helper.make_graph(keep_nodes, model.graph.name,
+                                  model.graph.input, var_out,
+                                  model.graph.initializer)
+
+        onnx_model = helper.make_model(graph)
+        onnx_model.ir_version = model.ir_version
+        onnx_model.producer_name = model.producer_name
+        onnx_model.producer_version = model.producer_version
+        onnx_model.domain = model.domain
+        onnx_model.model_version = model.model_version
+        onnx_model.doc_string = model.doc_string
+
+        if len(onnx_model.graph.input) != len(model.graph.input):
+            raise RuntimeError("Input mismatch {} != {}".format(
+                len(onnx_model.input), len(model.input)))
+        return onnx_model
+
+    def get_dynamic_shape_from_caffe2(self, layer, input_shapes):
+        """
+        get dynamic shape from caffe2.backend
+        """
+        try:
+            import torch
+            version = torch.__version__
+            if '1.1.0' not in version:
+                print("your model have dynamic graph, torch==1.1.0 is required")
+                return
+        except:
+            print(
+                "your model have dynamic graph, we use caff2 to inference graph, please use \"pip install torch==1.1.0\"."
+            )
+            return
+        from caffe2.python.onnx.backend import prepare
+        shape = input_shapes[0]
+        np_images = np.random.rand(shape[0], shape[1], shape[2],
+                                   shape[3]).astype('float32')
+        num_onnx = self.split_model(self.model, layer)
+        prepared_backend = prepare(num_onnx, device='CPU')
+        output = prepared_backend.run(inputs=np_images)
+        return output[0].tolist()
+
+    def get_dynamic_shape_from_onnx(self, layer, input_shapes):
+        """
+        get dynamic shape from onnxruntime
+        """
+        import onnxruntime as rt
+        from onnxruntime.backend import prepare
+        import numpy as np
+        num_onnx = self.split_model(self.model, layer)
+        sess = prepare(num_onnx)
+        shape = input_shapes[0]
+        print(shape)
+        np_images = np.random.rand(shape[0], shape[1], shape[2],
+                                   shape[3]).astype('float32')
+        output = sess.run(model=sess, inputs=np_images)
+        return output[0].tolist()

x2paddle/op_mapper/onnx_directly_map.py

+#   Copyright (c) 2019  PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from collections import OrderedDict as _dict
+import numpy as _np
+
+default_op_mapping_field_values = _dict()
+default_op_mapping_field_values['FLUID_OP'] = ''
+default_op_mapping_field_values['FLUID_INPUT_ARGS'] = None
+default_op_mapping_field_values['FLUID_OUTPUT_ARGS'] = None
+default_op_mapping_field_values['ATTR_MAPPING'] = dict()
+default_op_mapping_field_values['DEFAULTS'] = dict()
+default_op_mapping_field_values['INPUT_PERM'] = None
+default_op_mapping_field_values['OUTPUT_PERM'] = None
+default_op_mapping_field_values['FILL_NAME_FIELD'] = True
+default_op_mapping = {
+    'Gather': ['gather', ['X'], ['Out'],
+               dict(axis='')],
+    'Shape': ['shape', ['X'], ['Out']],
+    'Mul': ['elementwise_mul', ['X', 'Y'], ['Out'],
+            dict(),
+            dict(axis=-1)],
+    'Clip': [
+        'clip', ['X'], ['Out'],
+        dict(),
+        dict(
+            min=(_np.asarray([255, 255, 127, 255],
+                             dtype=_np.uint8).view(_np.float32)),
+            max=(_np.asarray([255, 255, 127, 127],
+                             dtype=_np.uint8).view(_np.float32)),
+        )
+    ],
+    'ReduceMean': [
+        'reduce_mean', ['X'], ['Out'],
+        dict(axes='dim', keepdims='keep_dim'),
+        dict(keep_dim=1)
+    ]
+}
+
+default_ioa_constraint = {
+    'Gather':
+    [(lambda i, o, a: a.get('axis', 0) == 0, 'only axis = 0 is supported')],
+}

x2paddle/op_mapper/onnx_op_mapper.py

+#   Copyright (c) 2019  PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from x2paddle.core.graph import GraphNode
+from x2paddle.core.op_mapper import OpMapper
+from x2paddle.core.util import *
+from x2paddle.core.fluid_code import Layer
+from x2paddle.core.fluid_code import FluidCode
+from x2paddle.decoder.onnx_decoder import ONNXGraph, ONNXGraphNode, ONNXGraphDataNode
+from x2paddle.op_mapper.onnx_directly_map import default_op_mapping_field_values
+from x2paddle.op_mapper.onnx_directly_map import default_op_mapping
+from x2paddle.op_mapper.onnx_directly_map import default_ioa_constraint
+import numpy as np
+import logging as _logging
+from collections import OrderedDict as _dict
+
+_logger = _logging.getLogger(__name__)
+
+
+def _const_weight_or_none(node):
+    if 'Constant' in node.layer_name:
+        return val.value
+    if isinstance(node, ONNXGraphDataNode):
+        return node.weight
+    return None
+
+
+class ONNXOpMapper(OpMapper):
+    def __init__(self, decoder):
+        super(ONNXOpMapper, self).__init__()
+        self.decoder = decoder
+        self.graph = decoder.onnx_graph
+        self.input_shapes = []
+        self.weights = dict()
+        self.omit_nodes = list()
+
+        if not self.op_checker():
+            raise Exception("Model are not supported yet.")
+
+        #mapping op
+
+        print("Total nodes: {}".format(
+            sum([
+                isinstance(node, ONNXGraphNode)
+                for name, node in self.graph.node_map.items()
+            ])))
+        for node_name in self.graph.topo_sort:
+            node = self.graph.get_node(node_name)
+            op = node.layer_type
+            if hasattr(self, op):
+                func = getattr(self, op)
+                func(node)
+            elif op in default_op_mapping:
+                self.directly_map(node)
+
+    def op_checker(self):
+        unsupported_ops = set()
+        for node_name in self.graph.topo_sort:
+            node = self.graph.get_node(node_name)
+            op = node.layer_type
+            if not hasattr(self, op) and op not in default_op_mapping:
+                unsupported_ops.add(op)
+        if len(unsupported_ops) == 0:
+            return True
+        else:
+            print("There are {} ops not supported yet, list as below".format(
+                len(unsupported_ops)))
+            for op in unsupported_ops:
+                print(op)
+            return False
+
+    def directly_map(self, node, *args, name='', **kwargs):
+        inputs = node.layer.input
+        outputs = node.layer.output
+        op_type = node.layer_type
+        attrs = node.attr_map
+
+        info = default_op_mapping[op_type]
+        info.extend(list(default_op_mapping_field_values.values())[len(info):])
+        (
+            fluid_op,
+            fluid_input_args,
+            fluid_output_args,
+            attr_mapping,
+            default_attrs,
+            input_perm,
+            output_perm,
+            fill_name_field,
+        ) = info
+
+        if fluid_op in default_ioa_constraint:
+            for predicate, message in default_ioa_constraint[fluid_op]:
+                assert predicate(inputs, outputs, attrs), message
+
+        mapped_attrs = {
+            attr_mapping.get(key, key): value
+            for key, value in attrs.items()
+        }
+        if '' in mapped_attrs:
+            mapped_attrs.pop('')
+        if '_' in mapped_attrs:
+            mapped_attrs.pop('_')
+        fluid_attrs = default_attrs.copy()
+        fluid_attrs.update(mapped_attrs)
+        val_inps = inputs if input_perm is None else list(
+            map(lambda i: inputs[i], input_perm))
+        val_outs = outputs if output_perm is None else list(
+            map(lambda i: outputs[i], output_perm))
+        attr = fluid_attrs
+        if fluid_op not in ['shape', 'gather']:
+            attr['name'] = string(node.layer_name)
+        node.fluid_code.add_layer(fluid_op,
+                                  inputs=', '.join(val_inps),
+                                  output=val_outs[0],
+                                  param_attr=attr)
+
+    def place_holder(self, node):
+        self.input_shapes.append(node.out_shapes)
+        attr = {
+            "dtype": string(node.dtype),
+            "shape": node.out_shapes,
+            "name": string(node.layer_name),
+            "append_batch_size": 'False'
+        }
+
+        node.fluid_code.add_layer("data",
+                                  inputs=None,
+                                  output=node,
+                                  param_attr=attr)
+
+    def create_parameter(self, node, parameter=None):
+        if parameter is not None:
+            node = parameter
+        dtype = node.dtype
+        shape = node.out_shapes
+
+        self.weights[node.layer_name] = node.weight
+        attr = {
+            'dtype': string(dtype),
+            'shape': shape,
+            'name': string(node.layer_name),
+            'attr': string(node.layer_name),
+            'default_initializer': 'Constant(0.0)'
+        }
+        node.fluid_code.add_layer("create_parameter",
+                                  inputs=None,
+                                  output=node,
+                                  param_attr=attr)
+
+    def _pad_if_asymmetric(self, node, pads, val_name):  # pads: SSEE
+        assert len(pads) & 1 == 0
+        symmetric = True
+        ndims = len(pads) // 2
+        for idx_dim in range(ndims):
+            if pads[idx_dim] != pads[ndims + idx_dim]:
+                symmetric = False
+                break
+        if symmetric:
+            return pads[:ndims], val_name
+        val_padded = self.Pad(node, op_independent=False)
+        return [0] * ndims, val_padded
+
+    def Pad(self, node, op_independent=True):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        pads = node.get_attr('pads')
+        mode = node.get_attr('mode', 'constant')
+        value = node.get_attr('value', 0.)
+        data_shape = val_x.out_shapes
+        output_shape = node.out_shapes
+        assume_pad2d = False
+        attr = {}
+        if len(pads) == 4:
+            assume_pad2d |= mode != 'constant'
+            if data_shape:
+                assume_pad2d |= data_shape and len(data_shape) == 4  # NCHW
+            if output_shape:
+                assume_pad2d |= output_shape and len(output_shape) == 4  # NCHW
+        if assume_pad2d:
+            fluid_op = 'pad2d'
+            attr['data_format'] = string('NCHW')
+            attr['mode'] = string(mode)
+        else:
+            attr = {'pad_value': value}
+            assert mode == 'constant', 'mode {} is supported only in pad2d'.format(
+                mode)
+            fluid_op = 'pad'
+        if len(pads) == 4:
+            paddings = np.array(pads).reshape(
+                (-1, 2)).transpose().flatten().tolist()  # SSEE -> SESE
+        elif len(pads) == 8:
+            paddings = np.array(pads).reshape(
+                (-1, 4)).transpose().flatten().tolist()  # SSEE -> SESE
+        attr['paddings'] = paddings
+        if op_independent:
+            attr['name'] = string(node.layer_name)
+            node.fluid_code.add_layer(fluid_op,
+                                      inputs=val_x,
+                                      output=node,
+                                      param_attr=attr)
+        else:
+            attr['name'] = string(node.layer_name + '_paded')
+            node.fluid_code.add_layer(fluid_op,
+                                      inputs=val_x,
+                                      output=node.layer_name + '_paded',
+                                      param_attr=attr)
+            return node.layer_name + '_paded'
+
+    def Unsqueeze(self, node):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        axes = node.get_attr('axes')
+        attr = {'axes': axes, 'name': string(node.layer_name)}
+        node.fluid_code.add_layer('unsqueeze',
+                                  inputs=val_x,
+                                  output=node,
+                                  param_attr=attr)
+
+    def Constant(self, node):
+        val_output = self.graph.get_node(node.layer.output[0], copy=True)
+
+        value = node.get_attr('value')
+        dtype = np.dtype(value.dtype)
+        output_dtype = val_output.dtype
+        if output_dtype:
+            assert dtype == output_dtype, 'tensor dtype unmatches storage dtype'
+
+        shape = node.get_attr('shape', None)
+        if shape is None:
+            shape = val_output.out_shapes
+        if shape is None:
+            shape = list(value.shape)
+            _logger.warning(
+                'in (Constant -> %s): '
+                'attribute "shape" of %s not inferred, '
+                'using value as 1-D tensor may lead to fails',
+                val_output.layer_name, val_output.layer_name)
+
+        value = value.tolist()
+        if len(value) == 1:  # scalar
+            shape = [1]
+            value = value[0]
+            if dtype.name == 'int64':
+                dtype = 'int32'
+            attr = {'shape': shape, 'dtype': string(dtype), 'value': value}
+            node.fluid_code.add_layer('fill_constant',
+                                      inputs=None,
+                                      output=node,
+                                      param_attr=attr)
+
+    def Resize(self, node):
+        # I/O
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        val_scales = self.graph.get_node(node.layer.input[1], copy=True)
+        val_y, = self.graph.get_node(node.layer.output[0], copy=True)
+
+        out_shape_ = val_y.out_shapes
+        if out_shape_ is not None:
+            assert len(out_shape_) == 4, 'only 4-D Tensor as X and Y supported'
+            out_shape_ = out_shape_[2:]
+        scales = _const_weight_or_none(val_scales)
+        if scales is not None:
+            assert len(scales) == 4, 'only 4-D Tensor as X and Y supported'
+            assert scales[0] == 1 and scales[
+                1] == 1, 'only scale on (NC)HW supported'
+            assert scales[2] == scales[
+                3], 'only aspect-ratio-invariant scale supported'
+        scale = scales[2] if scales else None
+        if scale is None:
+            assert out_shape_, 'neither scales nor output shape is available'
+            out_shape = out_shape_
+        else:
+            out_shape = None
+            if out_shape_ is None:
+                in_shape = val_x.out_shapes
+                assert in_shape is not None, 'out_shape required but not inferrable'
+                assert len(
+                    in_shape) == 4, 'only 4-D Tensor as X and Y supported'
+                out_shape_ = [in_shape[2] * scale, in_shape[3] * scale]
+
+        mode = node.get_attr('mode', 'nearest')
+        fluid_op = 'resize_{}'.format(mode)
+        name_attr = ', name={}'.format(repr(name)) if name else ''
+
+        attr = {
+            'scale': scale,
+            'out_shape': out_shape,
+            'name': string(node.layer_name)
+        }
+        node.fluid_code.add_layer(fluid_op,
+                                  inputs=val_x,
+                                  output=node,
+                                  param_attr=attr)
+
+    def ConstantOfShape(self, node):
+        val_shape = self.graph.get_node(node.layer.input[0], copy=True)
+
+        shape = _const_weight_or_none(val_shape)
+
+        if shape is None:
+            shape = node.out_shapes
+
+        assert shape is not None, (
+            'given shape is neither const value nor deductible from output, '
+            'this is not supported')
+
+        value = node.get_attr('value')
+        dtype = value.dtype
+        value = value.tolist()
+        if len(value) == 1:
+            shape = [1]
+            value = value[0]
+            if dtype.name == 'int64':
+                dtype = 'int32'
+            attr = {'shape': shape, 'dtype': string(dtype), 'value': value}
+            node.fluid_code.add_layer('fill_constant',
+                                      inputs=None,
+                                      output=node,
+                                      param_attr=attr)
+
+    def Split(self, node):
+        val_input = self.graph.get_node(node.layer.input[0], copy=True)
+        var_outs = [val for val in node.layer.input]
+
+        fluid_op = 'split'
+        split = node.get_attr['split']
+        axis = node.get_attr('axis', 0)
+        attr = {'split': split, 'axis': axis, 'name': string(node.layer_name)}
+        # generation
+        node.fluid_code.add_layer('split',
+                                  inputs=val_input,
+                                  output=var_outs,
+                                  param_attr=attr)
+
+    def Reshape(self, node):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        val_shape = self.graph.get_node(node.layer.input[1], copy=True)
+        val_reshaped = self.graph.get_node(node.layer.output[0], copy=True)
+        shape = None
+        if isinstance(val_shape, ONNXGraphDataNode):
+            self.omit_nodes.append(val_shape.layer_name)
+
+        # catch dynamic graph shape
+        if isinstance(val_shape, ONNXGraphNode):
+            shape = self.decoder.get_dynamic_shape_from_caffe2(
+                val_shape.layer_name, self.input_shapes)
+        if shape is None:
+            shape = val_reshaped.out_shapes
+
+        shape_dtype = val_shape.dtype
+
+        if shape_dtype is None:
+            _logger.warning(
+                'in op %s(%s -> Reshape -> %s): '
+                'dtype of input "shape" not inferred, int32 assumed',
+                node.layer_name, val_x.layer_name, val_reshaped.layer_name)
+            shape_dtype = _np.dtype('int32')
+        if shape is None:
+            shape = [1, -1]
+            _logger.warning(
+                'in %s(%s -> Reshape -> %s): '
+                'input "shape" not inferred, use [1, -1] as dummy value, '
+                'the behavior of Paddle fluid maybe undefined', node.layer_name,
+                val_x.layer_name, val_reshaped.layer_name)
+        attr = {'shape': shape, 'name': string(node.layer_name)}
+
+        node.fluid_code.add_layer('reshape',
+                                  inputs=val_x,
+                                  output=node,
+                                  param_attr=attr)
+
+    def Cast(self, node):
+        val_input = self.graph.get_node(node.layer.input[0], copy=True)
+        val_output = self.graph.get_node(node.layer.output[0], copy=True)
+
+        dtype = node.get_attr('to')
+        if not isinstance(dtype, np.dtype):
+            dtype = TENSOR_TYPE_TO_NP_TYPE[dtype]
+
+        output_dtype = val_output.dtype
+        if output_dtype:
+            assert dtype == output_dtype, 'dtype of to unmatches output'
+        attr = {'dtype': string(dtype)}
+        node.fluid_code.add_layer('cast',
+                                  inputs=val_input,
+                                  output=node,
+                                  param_attr=attr)
+
+    def AveragePool(self, node):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        assert node.get_attr(
+            'auto_pad',
+            'NOTSET') == 'NOTSET', 'only auto_pad = NOTSET is supported'
+        kernel_shape = node.get_attr("kernel_shape")
+        poolnd = len(kernel_shape)
+        strides = node.get_attr("strides")
+        pad_mode = node.get_attr("pads")
+        ceil_mode = bool(node.get_attr('ceil_mode', 0))
+        pads = node.get_attr('pads', [0] * (poolnd * 2))
+        fluid_op = 'pool{}d'.format(poolnd)
+        assert 2 <= poolnd <= 3, 'only pool2d and pool3d is supported'
+
+        paddings, val_x = self._pad_if_asymmetric(node, pads, val_x)
+        attr = {
+            "pool_size": kernel_shape,
+            "pool_type": string('avg'),
+            "pool_stride": strides,
+            "pool_padding": paddings,
+            "ceil_mode": ceil_mode,
+            "exclusive": 'True',
+            "name": string(node.layer_name)
+        }
+
+        node.fluid_code.add_layer(fluid_op,
+                                  inputs=val_x,
+                                  output=node,
+                                  param_attr=attr)
+
+    def Concat(self, node):
+        inputs = []
+        for i in range(len(node.layer.input)):
+            ipt = self.graph.get_node(node.layer.input[i], copy=True)
+            if isinstance(ipt, str):
+                inputs.append(ipt)
+            else:
+                inputs.append(ipt.layer_name)
+        axis = node.get_attr('axis')
+        attr = {'axis': axis}
+        node.fluid_code.add_layer('concat',
+                                  inputs='[' + ', '.join(inputs) + ']',
+                                  output=node,
+                                  param_attr=attr)
+
+    def Flatten(self, node):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        axis = node.get_attr('axis', 1)
+        attr = {"axis": str(axis), "name": string(node.layer_name)}
+        node.fluid_code.add_layer('flatten',
+                                  inputs=val_x,
+                                  output=node,
+                                  param_attr=attr)
+
+    def Gemm(self, node):
+        val_a = self.graph.get_node(node.layer.input[0], copy=True)
+        val_b = self.graph.get_node(node.layer.input[1], copy=True)
+        val_c = self.graph.get_node(node.layer.input[2], copy=True)
+
+        alpha = node.get_attr('alpha', 1.)  # optional
+        beta = node.get_attr('beta', 1.)  # optional
+        trans_a = bool(node.get_attr('transA', 0))  # optional
+        trans_b = bool(node.get_attr('transB', 0))  # optional
+        val_mm = node.layer_name + '_mm'
+        matmul_inputs = {"x": val_a, "y": val_b}
+        attr_matmul = {
+            "transpose_x": trans_a,
+            "transpose_y": trans_b,
+            "alpha": alpha,
+            "name": string(val_mm)
+        }
+        node.fluid_code.add_layer('matmul',
+                                  inputs=matmul_inputs,
+                                  output=val_mm,
+                                  param_attr=attr_matmul)
+
+        if beta != 0:
+            if beta == 1.:
+                add_inputs = {"x": val_mm, "y": val_c}
+                attr = {"name": string(node.layer_name)}
+                node.fluid_code.add_layer("elementwise_add",
+                                          inputs=add_inputs,
+                                          output=node,
+                                          param_attr=attr)
+            else:
+                var_beta = node.layer_name + '_beta'
+                matmul_beta_inputs = {"x": val_c, "y": var_beta}
+                node.fluid_code.add_layer("Constant",
+                                          inputs=matmul_beta_inputs,
+                                          output=var_beta,
+                                          param_attr={'value': beta})
+
+                add_inputs = {"x": val_mm, "y": var_beta}
+                attr = {"name": string(node.layer_name)}
+                node.fluid_code.add_layer("elementwise_add",
+                                          inputs=add_inputs,
+                                          output=node,
+                                          param_attr=attr)
+
+    def Add(self, node):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        val_y = self.graph.get_node(node.layer.input[1], copy=True)
+        inputs = {
+            "x": val_x,
+            "y": val_y,
+        }
+        attr = {"name": string(node.layer_name)}
+        node.fluid_code.add_layer("elementwise_add",
+                                  inputs=inputs,
+                                  output=node,
+                                  param_attr=attr)
+
+    def Sum(self, node):
+        var_inps = [val for val in node.layer.input]
+        node.fluid_code.add_layer("sum",
+                                  inputs='[' + ', '.join(var_inps) + ']',
+                                  output=node)
+
+    def MatMul(self, node):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        val_y = self.graph.get_node(node.layer.input[1], copy=True)
+        inputs = {"x": val_x, "y": val_y}
+        attr = {"name": string(node.layer_name)}
+        node.fluid_code.add_layer("matmul",
+                                  inputs=inputs,
+                                  output=node,
+                                  param_attr=attr)
+
+    def BatchNormalization(self, node):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        val_scale = self.graph.get_node(node.layer.input[1], copy=True)
+        val_b = self.graph.get_node(node.layer.input[2], copy=True)
+        val_mean = self.graph.get_node(node.layer.input[3], copy=True)
+        val_var = self.graph.get_node(node.layer.input[4], copy=True)
+
+        self.omit_nodes.append(val_scale.layer_name)
+        self.omit_nodes.append(val_b.layer_name)
+        self.omit_nodes.append(val_mean.layer_name)
+        self.omit_nodes.append(val_var.layer_name)
+
+        momentum = node.get_attr('momentum', .9)
+        epsilon = node.get_attr('epsilon', 1e-5)
+
+        # Attribute: spatial is used in BatchNormalization-1,6,7
+        spatial = bool(node.get_attr('spatial'))
+        attr = {
+            "momentum": momentum,
+            "epsilon": epsilon,
+            "data_layout": string('NCHW'),
+            "is_test": True,
+            "param_attr": string(val_scale.layer_name),
+            "bias_attr": string(val_b.layer_name),
+            "moving_mean_name": string(val_mean.layer_name),
+            "moving_variance_name": string(val_var.layer_name),
+            "use_global_stats": spatial,
+            "name": string(node.layer_name)
+        }
+        node.fluid_code.add_layer("batch_norm",
+                                  inputs=val_x,
+                                  output=node,
+                                  param_attr=attr)
+
+    def Softmax(self, node):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        attr = {"name": string(node.layer_name)}
+        node.fluid_code.add_layer("softmax",
+                                  inputs=val_x,
+                                  output=node,
+                                  param_attr=attr)
+
+    def Transpose(self, node):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        perm = node.get_attr('perm')
+        attr = {'perm': perm, "name": string(node.layer_name)}
+        node.fluid_code.add_layer("transpose",
+                                  inputs=val_x,
+                                  output=node,
+                                  param_attr=attr)
+
+    def Div(self, node):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        val_y = self.graph.get_node(node.layer.input[1], copy=True)
+        inputs = {'x': val_x, 'y': val_y}
+        attr = {"name": string(node.layer_name)}
+        node.fluid_code.add_layer("elementwise_div",
+                                  inputs=inputs,
+                                  output=node,
+                                  param_attr=attr)
+
+    def Relu(self, node):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        attr = {"name": string(node.layer_name)}
+        node.fluid_code.add_layer("relu",
+                                  inputs=val_x,
+                                  output=node,
+                                  param_attr=attr)
+
+    def PRelu(self, node):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        val_slope = self.graph.get_node(node.layer.input[1], copy=True)
+        attr = {"name": string(node.layer_name), "mode": string('channel')}
+
+        if isinstance(val_slope, str):
+            attr["param_attr"] = string(val_slope.layer_name)
+        else:
+            attr["param_attr"] = string(val_slope.layer_name)
+        node.fluid_code.add_layer("prelu",
+                                  inputs=val_x,
+                                  output=node,
+                                  param_attr=attr)
+
+    def Squeeze(self, node):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        squeeze_dims = node.get_attr('squeeze_dims')
+        attr = {'axes': squeeze_dims, "name": string(node.layer_name)}
+        node.fluid_code.add_layer("squeeze",
+                                  inputs=val_x,
+                                  output=node,
+                                  param_attr=attr)
+
+    def Identity(self, node):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        node.fluid_code.add_layer("assign", inputs=val_x, output=node)
+
+    def MaxPool(self, node):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        assert node.get_attr(
+            'auto_pad', 'NOTSET'
+        ) == 'NOTSET', 'only auto_pad = NOTSET is supported'  # optional
+
+        assert node.get_attr(
+            "dilations") is None, 'only dilations = 0 is supported'  # optional
+
+        kernel_shape = node.get_attr("kernel_shape")
+        poolnd = len(kernel_shape)
+        strides = node.get_attr("strides")
+        pad_mode = node.get_attr("pads")
+        ceil_mode = bool(node.get_attr('ceil_mode', 0))  # optional
+        pads = node.get_attr('pads', [0] * (poolnd * 2))  # optional
+        fluid_op = 'pool{}d'.format(poolnd)
+        assert 2 <= poolnd <= 3, 'only pool2d and pool3d is supported'
+        paddings, val_x = self._pad_if_asymmetric(node, pads, val_x)
+        attr = {
+            "pool_size": kernel_shape,
+            "pool_type": string("max"),
+            "pool_stride": strides,
+            "pool_padding": paddings,
+            "ceil_mode": ceil_mode,
+            "name": string(node.layer_name),
+            "exclusive": False
+        }
+        node.fluid_code.add_layer(fluid_op,
+                                  inputs=val_x,
+                                  output=node,
+                                  param_attr=attr)
+
+    def GlobalAveragePool(self, node):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        val_y = self.graph.get_node(node.layer.output[0], copy=True)
+        input_shape = val_x.out_shapes
+        output_shape = val_y.out_shapes
+        assert input_shape is not None or output_shape is not None, 'poolnd not inferred'  # N
+        if input_shape:
+            poolnd = len(input_shape) - 2  # NC...
+        elif output_shape:
+            poolnd = len(output_shape) - 2  # NC...
+        assert 2 <= poolnd <= 3, 'only pool2d and pool3d is supported'
+        fluid_op = 'pool{}d'.format(poolnd)
+        attr = {
+            "pool_type": string("avg"),
+            "global_pooling": True,
+            "name": string(node.layer_name)
+        }
+        node.fluid_code.add_layer(fluid_op,
+                                  inputs=val_x,
+                                  output=node,
+                                  param_attr=attr)
+
+    def Conv(self, node):
+        val_x = self.graph.get_node(node.layer.input[0], copy=True)
+        val_w = self.graph.get_node(node.layer.input[1], copy=True)
+        val_y = self.graph.get_node(node.layer.output[0], copy=True)
+
+        self.omit_nodes.append(val_w.layer_name)
+        input_shape = val_x.out_shapes
+
+        has_bias = len(node.layer.input) == 3
+        if has_bias:
+            val_b = self.graph.get_node(node.layer.input[2], copy=True)
+            self.omit_nodes.append(val_b.layer_name)
+        auto_pad = node.get_attr('auto_pad', 'NOTSET')
+
+        kernel_shape = val_w.out_shapes[2:]  # OI...
+        assert kernel_shape == node.get_attr(
+            'kernel_shape'), 'kernel_shape in attr unmatches value_info'  # HW
+        convnd = len(kernel_shape)
+        assert 2 <= convnd <= 3, 'only conv2d and conv3d is supported'
+        num_out_channels = val_w.out_shapes[0]  # OI...
+        fluid_op = 'conv{}d'.format(convnd)
+
+        num_groups = node.get_attr('group', 1)
+        strides = node.get_attr('strides', [1] * convnd)  # optional
+        dilations = node.get_attr('dilations', [1] * convnd)  # optional
+        pads = node.get_attr('pads', [0] * (convnd * 2))  # optional
+
+        paddings, val_x = self._pad_if_asymmetric(node, pads, val_x)
+
+        if auto_pad == "SAME_UPPER" or auto_pad == "SAME_UPPER":
+            pad_h = get_same_padding(input_shape[2], kernel_shape[0],
+                                     strides[0])
+            pad_w = get_same_padding(input_shape[3], kernel_shape[1],
+                                     strides[1])
+            attr = {"paddings": pad_h + pad_w, "pad_value": 0.0}
+
+        attr = {
+            "num_filters": num_out_channels,
+            "filter_size": kernel_shape,
+            "stride": strides,
+            "padding": paddings,
+            "dilation": dilations,
+            "groups": num_groups,
+            'param_attr': string(val_w.layer_name),
+            "name": string(node.layer_name)
+        }
+        if has_bias:
+            attr["bias_attr"] = string(val_b.layer_name)
+        else:
+            attr["bias_attr"] = False
+        node.fluid_code.add_layer(fluid_op,
+                                  inputs=val_x,
+                                  output=node,
+                                  param_attr=attr)

x2paddle/optimizer/onnx_optimizer.py

+#   Copyright (c) 2019  PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# TODO useless node remove
+from x2paddle.op_mapper.onnx_op_mapper import ONNXOpMapper
+from x2paddle.core.util import *
+
+
+class ONNXOptimizer(object):
+    def __init__(self, op_mapper):
+        self.op_mapper = op_mapper
+        self.graph = op_mapper.graph
+
+    def delete_redundance_code(self):
+        for node_name in self.graph.topo_sort:
+            if node_name in self.op_mapper.omit_nodes:
+                node = self.graph.get_node(node_name)
+                omit_freq = self.op_mapper.omit_nodes.count(node_name)
+                if len(node.outputs) <= omit_freq:
+                    node.fluid_code.clear()

x2paddle_model_zoo.md

@@ -26,3 +26,33 @@
 | ShuffleNet | [code](https://github.com/miaow1988/ShuffleNet_V2_pytorch_caffe/releases/tag/v0.1.0) |
 | mNASNet | [code](https://github.com/LiJianfei06/MnasNet-caffe) |
 | MTCNN | [code](https://github.com/kpzhang93/MTCNN_face_detection_alignment/tree/master/code/codes/MTCNNv1/model) |
+
+# ONNX
+
+| 模型 | 来源 | operator version|
+|-------|--------|---------|
+| Resnet18 | [torchvison.model.resnet18](https://github.com/pytorch/vision/blob/master/torchvision/models/resnet.py) |9|
+| Resnet34 | [torchvison.model.resnet34](https://github.com/pytorch/vision/blob/master/torchvision/models/resnet.py) |9|
+| Resnet50 | [torchvison.model.resnet50](https://github.com/pytorch/vision/blob/master/torchvision/models/resnet.py) |9|
+| Resnet101 | [torchvison.model.resnet101](https://github.com/pytorch/vision/blob/master/torchvision/models/resnet.py) |9|
+| Vgg11 | [torchvison.model.vgg11](https://github.com/pytorch/vision/blob/master/torchvision/models/vgg.py) |9|
+| Vgg11_bn | [torchvison.model.vgg11_bn](https://github.com/pytorch/vision/blob/master/torchvision/models/vgg.py) |9|
+| Vgg19| [torchvison.model.vgg19](https://github.com/pytorch/vision/blob/master/torchvision/models/vgg.py) |9|
+| Densenet121 | [torchvison.model.densenet121](https://github.com/pytorch/vision/blob/master/torchvision/models/densenet.py) |9|
+| Alexnet | [torchvison.model.alexnet](https://github.com/pytorch/vision/blob/master/torchvision/models/alexnet.py) |9|
+| Shufflenet | [onnx official](https://github.com/onnx/models/tree/master/vision/classification/shufflenet) |9|
+| Inception_v2 | [onnx official](https://github.com/onnx/models/tree/master/vision/classification/inception_and_googlenet/inception_v2) |9|
+
+目前onnx2paddle主要支持onnx operator version 9，关于如何使用torchvison的model:
+```
+import torch
+import torchvision
+
+#根据不同模型调整输入的shape
+dummy_input = torch.randn(1, 3, 224, 224)
+resnet18 = torchvision.models.resnet18(pretrained=True)
+
+#"resnet18.onnx"为onnx model的存储路径
+torch.onnx.export(resnet18, dummy_input, "resnet18.onnx",verbose=True)
+
+```