diff --git a/onnx2fluid/examples/convert_data_npz.py b/onnx2fluid/examples/convert_data_npz.py
index 82486de51001e355add8e43b43d312adf18b19e8..80c921a2e77eda5b2cc7d0a082560c4a39c7a8f9 100644
--- a/onnx2fluid/examples/convert_data_npz.py
+++ b/onnx2fluid/examples/convert_data_npz.py
@@ -14,14 +14,14 @@ from collections import OrderedDict as Dict
 
 def make_var_name(name):
     """
-	make a valid variable name in Python code
-	"""
+    make a valid variable name in Python code
+    """
 
     if name == '':
         return '_'
     if name[0].isdigit():
         return 'var_' + name
-    for s in ' \\|/:':  #
+    for s in ' \\|/:-':  #
         name = name.replace(s, '_')
     if name.startswith('_'):
         name = 'var' + name
diff --git a/onnx2fluid/examples/convert_data_pb.py b/onnx2fluid/examples/convert_data_pb.py
index 16484a8cb27f3a20e42666e967c07ad58ba87fc0..f07b73c0b5d205b909a6315a0fb1c7e0213d4ad9 100644
--- a/onnx2fluid/examples/convert_data_pb.py
+++ b/onnx2fluid/examples/convert_data_pb.py
@@ -17,14 +17,14 @@ from glob import glob
 
 def make_var_name(name):
     """
-	make a valid variable name in Python code
-	"""
+    make a valid variable name in Python code
+    """
 
     if name == '':
         return '_'
     if name[0].isdigit():
         return 'var_' + name
-    for s in ' \\|/:':  #
+    for s in ' \\|/:-':  #
         name = name.replace(s, '_')
     if name.startswith('_'):
         name = 'var' + name
diff --git a/onnx2fluid/examples/onnx_model_zoo.sh b/onnx2fluid/examples/onnx_model_zoo.sh
index b544b6e479f03199f2abbce0caee88b9079c8413..ca7fa9bf2c648d93f95c7cc5461fa677dc1c6a0e 100755
--- a/onnx2fluid/examples/onnx_model_zoo.sh
+++ b/onnx2fluid/examples/onnx_model_zoo.sh
@@ -311,7 +311,7 @@ resnet100_arcface()
 	echo "extracting ..."
 	tar xf "$fn_tar"
 
-	python -m onnx2fluid -o /tmp/export/ "$fn_model" -y
+	python -m onnx2fluid $convert_flags "$fn_model" -y
 	for pb_dir in "$bn_tar"/*/
 	do
 		echo "converting $pb_dir ..."
diff --git a/onnx2fluid/onnx2fluid/__main__.py b/onnx2fluid/onnx2fluid/__main__.py
index 17d5b4307a787a025c35b6b56683aba2fd8679bb..f09f63e331c83a5e6719f2e6396640cb33dba015 100644
--- a/onnx2fluid/onnx2fluid/__main__.py
+++ b/onnx2fluid/onnx2fluid/__main__.py
@@ -95,6 +95,14 @@ parser.add_argument(
     default=1e-2,
     help='assertion relative tolerance for validation',
 )
+parser.add_argument(
+    '--infer_inputs',
+    '-i',
+    nargs='?',
+    default=None,
+    const='',
+    help='perform type-shape inference with given input names and re-save model',
+)
 args = parser.parse_args()
 
 logging_format = '[%(levelname)8s]%(name)s::%(funcName)s:%(lineno)04d: %(message)s'
diff --git a/onnx2fluid/onnx2fluid/cmdline.py b/onnx2fluid/onnx2fluid/cmdline.py
index 801388a45db3d3586cb9c029d099319e1ff2c092..ba8b22bcf5293e70fa642a3076523a4e016c2037 100644
--- a/onnx2fluid/onnx2fluid/cmdline.py
+++ b/onnx2fluid/onnx2fluid/cmdline.py
@@ -60,19 +60,28 @@ def main(**kwargs):
     # validate
     passed = True
     golden_data_filename = kwargs.pop('test_data', '')
-    if golden_data_filename:
+    infer_inputs = kwargs.pop('infer_inputs', None)
+    if golden_data_filename or infer_inputs:
         from .validation import validate
 
+        save_inference_model = infer_inputs is not None
+        inference_input_names = infer_inputs.split(
+            ',') if infer_inputs else None
+
         logger.info('starting validation on desc ...')
         passed &= validate(shutil.os.path.join(save_dir, '__model__'),
-                           golden_data_filename, **kwargs)
+                           golden_data_filename=golden_data_filename,
+                           save_inference_model=save_inference_model,
+                           inference_input_names=inference_input_names,
+                           **kwargs)
 
         logger.info('starting validation on code ...')
         # this re-generate desc proto with Python code when debug on
         passed &= validate(shutil.os.path.join(save_dir, model_basename),
-                           golden_data_filename,
+                           golden_data_filename=golden_data_filename,
                            model_func_name=model_func_name,
-                           save_inference_model=debug,
+                           save_inference_model=save_inference_model,
+                           inference_input_names=inference_input_names,
                            **kwargs)
 
     if not passed:
diff --git a/onnx2fluid/onnx2fluid/conversion.py b/onnx2fluid/onnx2fluid/conversion.py
index 33957a6b0543c401d55539d84c96f77f26a2e449..0c440a3955020a6524a61c9a3e6ed75efd6534bf 100644
--- a/onnx2fluid/onnx2fluid/conversion.py
+++ b/onnx2fluid/onnx2fluid/conversion.py
@@ -27,8 +27,8 @@ def convert(onnx_model_filename,
             debug=False,
             **kwargs):
     """
-	convert an ONNX model to Paddle fluid Python code and desc pb
-	"""
+    convert an ONNX model to Paddle fluid Python code and desc pb
+    """
 
     import onnx
 
@@ -141,23 +141,22 @@ def convert(onnx_model_filename,
     logger.info('%d ops in, %d ops out', len(onnx_graph.node),
                 len(fluid_program.op_descs))
 
-    # shape-inference
+    # type-shape inference
     for name, value_info in graph_value_infos.items():
         var_name = make_var_name(name)
-        fluid_program.VarTypeInfo(var_name, value_info,
-                                  remove_batch=False)  # shape-infer only
+        fluid_program.VarTypeShapeInfo(var_name, value_info,
+                                       remove_batch=False)  # shape-infer only
     bad_var_names = []
     for var_name, var_desc in fluid_program.var_descs.items():
         if not var_desc.type.lod_tensor.HasField('tensor'):
             bad_var_names.append(var_name)
     if len(bad_var_names) > 0:
-        logger.warning('type info not infered for var %s ...',
+        logger.warning('type-shape not infered for var %s ...',
                        ', '.join(bad_var_names[:5]))
         logger.warning('this causes little problem for PaddlePaddle, '
                        'but Paddle Mobile may not infer correctly')
-        logger.warning(
-            'please consider adding option -d to invoke PaddlePaddle shape-inference'
-        )
+        logger.warning('please consider running onnx2fluid.validation with -i '
+                       'to invoke PaddlePaddle type-shape inference')
 
     # weight writer
     for name, weight in graph_weights(onnx_graph):
@@ -233,13 +232,9 @@ def convert(onnx_model_filename,
     logger.info('conversion finished')
 
 
-if __name__ == '__main__':
-    del convert
-
+def main():
     import argparse
 
-    from onnx2fluid.conversion import convert
-
     parser = argparse.ArgumentParser(
         description='onnx2fluid.convert',
         formatter_class=argparse.ArgumentDefaultsHelpFormatter,
@@ -310,3 +305,11 @@ if __name__ == '__main__':
             onnx_opset_pedantic=pedantic,
             onnx_skip_version_conversion=skip_version_conversion,
             debug=debug)
+
+
+if __name__ == '__main__':
+    del convert
+
+    from onnx2fluid.conversion import convert
+
+    main()
diff --git a/onnx2fluid/onnx2fluid/onnx_utils.py b/onnx2fluid/onnx2fluid/onnx_utils.py
index 67d9fe854ca5b192a4917b7a8b218e63e119eb0c..19e0c73dfbbb4b2188e84edd963131f620613498 100644
--- a/onnx2fluid/onnx2fluid/onnx_utils.py
+++ b/onnx2fluid/onnx2fluid/onnx_utils.py
@@ -44,8 +44,8 @@ DEFAULT_OP_DOMAIN = 'ai.onnx'
 
 def print_pb_structure(message, loop_iterative=False, depth=0):
     """
-	print pb fields in its structure
-	"""
+    print pb fields in its structure
+    """
 
     if hasattr(message, 'DESCRIPTOR') and hasattr(message.DESCRIPTOR, 'fields'):
         for field in message.DESCRIPTOR.fields:
@@ -65,8 +65,8 @@ def print_pb_structure(message, loop_iterative=False, depth=0):
 
 def build_value_refs(nodes):
     """
-	build op reference of inputs and outputs
-	"""
+    build op reference of inputs and outputs
+    """
 
     input_refs = Dict()
     output_refs = Dict()
@@ -80,8 +80,8 @@ def build_value_refs(nodes):
 
 def get_attribute_value2(attr):
     """
-	get_attribute_value enhanced
-	"""
+    get_attribute_value enhanced
+    """
 
     if attr.type == onnx.AttributeProto.TENSOR:
         dtype = np.dtype(TENSOR_TYPE_TO_NP_TYPE[attr.t.data_type])
@@ -99,24 +99,24 @@ def get_attribute_value2(attr):
 
 def tensor_dtype(tensor):
     """
-	get ONNX tensor in np.dtype
-	"""
+    get ONNX tensor in np.dtype
+    """
 
     return TENSOR_TYPE_TO_NP_TYPE[tensor.type.tensor_type.elem_type]
 
 
 def tensor_shape(tensor):
     """
-	get ONNX tensor shape
-	"""
+    get ONNX tensor shape
+    """
 
     return [dim.dim_value for dim in tensor.type.tensor_type.shape.dim]
 
 
 def node_attrs(node):
     """
-	convert ONNX node attributes to dict
-	"""
+    convert ONNX node attributes to dict
+    """
 
     return {attr.name: get_attribute_value2(attr)
             for attr in node.attribute}  # dict
@@ -124,8 +124,8 @@ def node_attrs(node):
 
 def node_topo(nodes, topo='default'):
     """
-	build indices with given topology to an ONNX node graph
-	"""
+    build indices with given topology to an ONNX node graph
+    """
 
     if topo == 'default':
         return list(range(len(nodes)))
@@ -192,8 +192,8 @@ def node_topo(nodes, topo='default'):
 
 def node_iter(nodes, indices=None):
     """
-	generator for ONNX node graph with given indices
-	"""
+    generator for ONNX node graph with given indices
+    """
 
     if indices is None:
         indices = range(len(nodes))
@@ -210,7 +210,7 @@ def node_iter(nodes, indices=None):
         if name == '':
             name = 'op_' + str(index)
         else:  # make_op_name
-            for s in ' \\|/:':  #
+            for s in ' \\|/:-':  #
                 name = name.replace(s, '_')
         if domain == '':
             domain = DEFAULT_OP_DOMAIN
@@ -220,8 +220,8 @@ def node_iter(nodes, indices=None):
 
 def graph_ops(graph, topo='default'):
     """
-	generator for ONNX node graph with given topology
-	"""
+    generator for ONNX node graph with given topology
+    """
 
     if not isinstance(graph, onnx.GraphProto):
         logger.error('graph is not a GraphProto instance')
@@ -232,8 +232,8 @@ def graph_ops(graph, topo='default'):
 
 def graph_weights(graph):
     """
-	generator for weights of an ONNX model
-	"""
+    generator for weights of an ONNX model
+    """
 
     if not isinstance(graph, onnx.GraphProto):
         logger.error('graph is not a GraphProto instance')
@@ -247,8 +247,8 @@ def graph_weights(graph):
 
 def inferred_model_value_info(model):
     """
-	collect value/type info for an ONNX model
-	"""
+    collect value/type info for an ONNX model
+    """
 
     model = infer_shapes(model)
     graph = model.graph
@@ -278,8 +278,8 @@ def inferred_model_value_info(model):
 
 def skip_node_forward(nodes, src_output_name, dst_input_name, input_refs):
     """
-	skip nodes between src_output_name -> dst_input_name and connect this pair
-	"""
+    skip nodes between src_output_name -> dst_input_name and connect this pair
+    """
 
     processed = 0
     for next_idx in input_refs[src_output_name]:
@@ -293,8 +293,8 @@ def skip_node_forward(nodes, src_output_name, dst_input_name, input_refs):
 
 def skip_node_backward(nodes, src_input_name, dst_output_name, output_refs):
     """
-	skip nodes between dst_output_name -> src_input_name and connect this pair
-	"""
+    skip nodes between dst_output_name -> src_input_name and connect this pair
+    """
 
     processed = 0
     for prev_idx in output_refs[src_input_name]:
@@ -308,8 +308,8 @@ def skip_node_backward(nodes, src_input_name, dst_output_name, output_refs):
 
 def optimize_model_skip_op_for_inference(model, op_list=None):
     """
-	skip ops can be bypassed for inference
-	"""
+    skip ops can be bypassed for inference
+    """
     if op_list is None:
         op_list = ('Dropout', 'Identity')
 
@@ -369,8 +369,8 @@ def optimize_model_skip_op_for_inference(model, op_list=None):
 
 def optimize_model_strip_initializer(model, keep_input_only=True):
     """
-	strip weights for inference
-	"""
+    strip weights for inference
+    """
 
     nodes = model.graph.node
     input_refs, output_refs = build_value_refs(nodes)
@@ -410,8 +410,8 @@ def optimize_model_strip_initializer(model, keep_input_only=True):
 
 def optimize_model_cast(model):
     """
-	strip cascade and unecessary onnx::Cast-9:
-	"""
+    strip cascade and unecessary onnx::Cast-9:
+    """
 
     nodes = model.graph.node
     input_refs, output_refs = build_value_refs(nodes)
@@ -467,8 +467,8 @@ def optimize_model_cast(model):
 
 def optimize_model_slice(model):
     """
-	strip cascade and unecessary onnx::Slice-1:9
-	"""
+    strip cascade and unecessary onnx::Slice-1:9
+    """
 
     nodes = model.graph.node
     input_refs, output_refs = build_value_refs(nodes)
diff --git a/onnx2fluid/onnx2fluid/symbolic.py b/onnx2fluid/onnx2fluid/symbolic.py
index 814103854dee72e3cd1d56538f03d1857babff6c..16733169990283714499d42c46cac3834fd55a4a 100644
--- a/onnx2fluid/onnx2fluid/symbolic.py
+++ b/onnx2fluid/onnx2fluid/symbolic.py
@@ -41,74 +41,74 @@ DEFAULT_OP_MAPPING_FIELD_VALUES['FILL_NAME_FIELD'] = True
 DEFAULT_OP_MAPPING_VALUES = list(DEFAULT_OP_MAPPING_FIELD_VALUES.values())
 
 DEFAULT_OP_MAPPING = {
-    ## nil ops ##
-    'RandomUniform':
-   ['uniform_random', [], ['Out'], dict(high='max', low='min'),
-    dict(), None, None, False],
-    'RandomNormal':
-   ['gaussian_random', [], ['Out'], dict(scale='std'),
-    dict(), None, None, False],
-    ## unary ops ##
-    'Abs': ['abs', ['X'], ['Out']],
-    'ArgMax': ['argmax', ['X'], ['Out'], dict(keepdims='')],
-    'ArgMin': ['argmin', ['X'], ['Out'], dict(keepdims='')],
-    'Ceil': ['ceil', ['X'], ['Out']],
-    'Clip': ['clip', ['X'], ['Out']], # attrs bypassed
-    'Cos': ['cos', ['X'], ['Out']],
-    'Elu': ['elu', ['X'], ['Out']],
-    'Exp': ['exp', ['X'], ['Out']],
-    'Flatten': ['flatten', ['X'], ['Out']], # attrs bypassed, FIXME: emit flatten2
-    'Floor': ['floor', ['X'], ['Out']],
-    'Gather': ['gather', ['X'], ['Out'], dict(axis='')],
-    'LeakyRelu': ['leaky_relu', ['X'], ['Out']],
-    'Log': ['log', ['X'], ['Out']],
-    'LRN': ['lrn', ['X'], ['Out', 'MidOut'], dict(size='n', bias='k')], #
-    'Reciprocal': ['reciprocal', ['X'], ['Out']],
-    'Relu': ['relu', ['X'], ['Out']],
-    'Selu': ['selu', ['X'], ['Out'], dict(gamma='scale')],
-    'Shape': ['shape', ['X'], ['Out']], # FIXME: out is int64 vs int32
-    'Shrink': ['softshrink', ['X'], ['Out'], dict(bias='', labmd='')],
-    'Sigmoid': ['sigmoid', ['X'], ['Out']],
-    'Sin': ['sin', ['X'], ['Out']],
-    'Squeeze': ['squeeze', ['X'], ['Out']], # attrs bypassed, FIXME: emit squeeze2
-    'Softplus': ['softplus', ['X'], ['Out']],
-    # FIXME: default axis = -1, reshape required before and after
-    'Softmax': ['softmax', ['X'], ['Out'], dict(axis='')],
-    'Softsign': ['softsign', ['X'], ['Out']],
-    'Sqrt': ['sqrt', ['X'], ['Out']],
-    'Tanh': ['tanh', ['X'], ['Out']],
-    'ThresholdedRelu': ['thresholded_relu', ['X'], ['Out'], dict(alpha='threshold')],
-    #'Transpose': ['transpose', ['X'], ['Out']],
-    'Unsqueeze': ['unsqueeze', ['X'], ['Out']], # attrs bypassed, FIXME: emit unsqueeze2
-    ## binary ops ##
-    'Add': ['elementwise_add', ['X', 'Y'], ['Out'], dict(), dict(axis=-1)],
-    #'AffineGrid': ['affine_grid', ['Theta'], ['Output'], dict(size='out_shape')],
-    'And': ['logical_and', ['X', 'Y'], ['Out']],
-    'Div': ['elementwise_div', ['X', 'Y'], ['Out'], dict(), dict(axis=-1)],
-    'Equal': ['equal', ['X', 'Y'], ['Out'], dict(), dict(), None, None, False],
-    'Greater': ['less_than', ['X', 'Y'], ['Out'], dict(), dict(), [1, 0], None, False],
-    'Less': ['less_than', ['X', 'Y'], ['Out'], dict(), dict(), None, None, False],
-    'MatMul': ['matmul', ['X', 'Y'], ['Out']], # defaults excluded for transpose_x vs transpose_X
-    'Max': ['elementwise_max', ['X', 'Y'], ['Out'], dict(), dict(axis=-1)],
-    'Min': ['elementwise_min', ['X', 'Y'], ['Out'], dict(), dict(axis=-1)],
-    'Mul': ['elementwise_mul', ['X', 'Y'], ['Out'], dict(), dict(axis=-1)],
-    'Not': ['logical_not', ['X', 'Y'], ['Out']],
-    'OneHot': # assuming values=[0, 1], axis=-1 and drop them
-   ['one_hot', ['Input', 'Depth'], ['Out'], dict(axis=''), dict(),
-    [0, 1], None, False],
-    'Or': ['logical_or', ['X', 'Y'], ['Out']],
-    'Pow': ['elementwise_pow', ['X', 'Y'], ['Out'], dict(), dict(axis=-1)], # TODO: pow for scalar exponent
-    'Sub': ['elementwise_sub', ['X', 'Y'], ['Out'], dict(), dict(axis=-1)],
-    'Xor': ['logical_xor', ['X', 'Y'], ['Out']],
-    # reduce ops
-    'ReduceMax': ['reduce_max', ['X'], ['Out'], dict(axes='dim', keepdims='keep_dim')],
-    'ReduceMean': ['reduce_mean', ['X'], ['Out'], dict(axes='dim', keepdims='keep_dim')],
-    'ReduceMin': ['reduce_min', ['X'], ['Out'], dict(axes='dim', keepdims='keep_dim')],
-    'ReduceProd': ['reduce_prod', ['X'], ['Out'], dict(axes='dim', keepdims='keep_dim')],
-    'ReduceSum': ['reduce_sum', ['X'], ['Out'], dict(axes='dim', keepdims='keep_dim')],
-    # other ops
-    'Scatter': ['scatter', ['X', 'Index', 'Updates'], ['Out']],
-    'TopK': ['topk', ['X', 'K'], ['Out', 'Indices']],
+        ## nil ops ##
+        'RandomUniform':
+            ['uniform_random', [], ['Out'], dict(high='max', low='min'),
+             dict(), None, None, False],
+        'RandomNormal':
+            ['gaussian_random', [], ['Out'], dict(scale='std'),
+             dict(), None, None, False],
+        ## unary ops ##
+        'Abs': ['abs', ['X'], ['Out']],
+        'ArgMax': ['argmax', ['X'], ['Out'], dict(keepdims='')],
+        'ArgMin': ['argmin', ['X'], ['Out'], dict(keepdims='')],
+        'Ceil': ['ceil', ['X'], ['Out']],
+        'Clip': ['clip', ['X'], ['Out']], # attrs bypassed
+        'Cos': ['cos', ['X'], ['Out']],
+        'Elu': ['elu', ['X'], ['Out']],
+        'Exp': ['exp', ['X'], ['Out']],
+        'Flatten': ['flatten', ['X'], ['Out']], # attrs bypassed, FIXME: emit flatten2
+        'Floor': ['floor', ['X'], ['Out']],
+        'Gather': ['gather', ['X'], ['Out'], dict(axis='')],
+        'LeakyRelu': ['leaky_relu', ['X'], ['Out']],
+        'Log': ['log', ['X'], ['Out']],
+        'LRN': ['lrn', ['X'], ['Out', 'MidOut'], dict(size='n', bias='k')], #
+        'Reciprocal': ['reciprocal', ['X'], ['Out']],
+        'Relu': ['relu', ['X'], ['Out']],
+        'Selu': ['selu', ['X'], ['Out'], dict(gamma='scale')],
+        'Shape': ['shape', ['X'], ['Out']], # FIXME: out is int64 vs int32
+        'Shrink': ['softshrink', ['X'], ['Out'], dict(bias='', labmd='')],
+        'Sigmoid': ['sigmoid', ['X'], ['Out']],
+        'Sin': ['sin', ['X'], ['Out']],
+        'Squeeze': ['squeeze', ['X'], ['Out']], # attrs bypassed, FIXME: emit squeeze2
+        'Softplus': ['softplus', ['X'], ['Out']],
+        # FIXME: default axis = -1, reshape required before and after
+        'Softmax': ['softmax', ['X'], ['Out'], dict(axis='')],
+        'Softsign': ['softsign', ['X'], ['Out']],
+        'Sqrt': ['sqrt', ['X'], ['Out']],
+        'Tanh': ['tanh', ['X'], ['Out']],
+        'ThresholdedRelu': ['thresholded_relu', ['X'], ['Out'], dict(alpha='threshold')],
+        #'Transpose': ['transpose', ['X'], ['Out']],
+        'Unsqueeze': ['unsqueeze', ['X'], ['Out']], # attrs bypassed, FIXME: emit unsqueeze2
+        ## binary ops ##
+        'Add': ['elementwise_add', ['X', 'Y'], ['Out'], dict(), dict(axis=-1)],
+        #'AffineGrid': ['affine_grid', ['Theta'], ['Output'], dict(size='out_shape')],
+        'And': ['logical_and', ['X', 'Y'], ['Out']],
+        'Div': ['elementwise_div', ['X', 'Y'], ['Out'], dict(), dict(axis=-1)],
+        'Equal': ['equal', ['X', 'Y'], ['Out'], dict(), dict(), None, None, False],
+        'Greater': ['less_than', ['X', 'Y'], ['Out'], dict(), dict(), [1, 0], None, False],
+        'Less': ['less_than', ['X', 'Y'], ['Out'], dict(), dict(), None, None, False],
+        'MatMul': ['matmul', ['X', 'Y'], ['Out']], # defaults excluded for transpose_x vs transpose_X
+        'Max': ['elementwise_max', ['X', 'Y'], ['Out'], dict(), dict(axis=-1)],
+        'Min': ['elementwise_min', ['X', 'Y'], ['Out'], dict(), dict(axis=-1)],
+        'Mul': ['elementwise_mul', ['X', 'Y'], ['Out'], dict(), dict(axis=-1)],
+        'Not': ['logical_not', ['X', 'Y'], ['Out']],
+        'OneHot': # assuming values=[0, 1], axis=-1 and drop them
+            ['one_hot', ['Input', 'Depth'], ['Out'], dict(axis=''), dict(),
+             [0, 1], None, False],
+        'Or': ['logical_or', ['X', 'Y'], ['Out']],
+        'Pow': ['elementwise_pow', ['X', 'Y'], ['Out'], dict(), dict(axis=-1)], # TODO: pow for scalar exponent
+        'Sub': ['elementwise_sub', ['X', 'Y'], ['Out'], dict(), dict(axis=-1)],
+        'Xor': ['logical_xor', ['X', 'Y'], ['Out']],
+        # reduce ops
+        'ReduceMax': ['reduce_max', ['X'], ['Out'], dict(axes='dim', keepdims='keep_dim')],
+        'ReduceMean': ['reduce_mean', ['X'], ['Out'], dict(axes='dim', keepdims='keep_dim')],
+        'ReduceMin': ['reduce_min', ['X'], ['Out'], dict(axes='dim', keepdims='keep_dim')],
+        'ReduceProd': ['reduce_prod', ['X'], ['Out'], dict(axes='dim', keepdims='keep_dim')],
+        'ReduceSum': ['reduce_sum', ['X'], ['Out'], dict(axes='dim', keepdims='keep_dim')],
+        # other ops
+        'Scatter': ['scatter', ['X', 'Index', 'Updates'], ['Out']],
+        'TopK': ['topk', ['X', 'K'], ['Out', 'Indices']],
 }
 
 DEFAULT_IOA_CONSTRAINTS = {
@@ -146,14 +146,14 @@ DEFAULT_IOA_CONSTRAINTS = {
 
 def _make_var_name(name):
     """
-	make a valid variable name in Python code and in filesystem
-	"""
+    make a valid variable name in Python code and in filesystem
+    """
 
     if name == '':
         return '_'
     if name[0].isdigit():
         return 'var_' + name
-    for s in ' \\|/:':  #
+    for s in ' \\|/:-':  #
         name = name.replace(s, '_')
     if name.startswith('_'):
         name = 'var' + name
@@ -191,14 +191,24 @@ def _const_weight_or_none(value_infos, val_name):
         return None
     value_info = value_infos[val_name]
     const_value = value_info.get('const_value', None)
-    if const_value:
+    if const_value is not None:
         return const_value
     get_weight_func = value_info.get('get_weight', None)
-    if get_weight_func:
+    if get_weight_func is not None:
         return get_weight_func()
     return None
 
 
+def _check_embeddable(value_infos, *val_names):
+    keyword = 'get_weight'
+    for val_name in val_names:
+        if keyword not in value_infos[val_name]:
+            _logger.warning('parameter %s not embeddable for some ops',
+                            val_name)
+            return False
+    return True
+
+
 def _default(prog, op_type, inputs, outputs, attrs, *args, name='', **kwargs):
     info = DEFAULT_OP_MAPPING[op_type]
     info.extend(DEFAULT_OP_MAPPING_VALUES[len(info):])
@@ -391,9 +401,9 @@ def _global_pool(prog, pool_type, inputs, outputs, attrs, value_infos, name=''):
     input_shape = _shape_or_none(value_infos, val_x)
     output_shape = _shape_or_none(value_infos, val_y)
     assert input_shape is not None or output_shape is not None, 'poolnd not inferred'  # NC...
-    if input_shape:
+    if input_shape is not None:
         poolnd = len(input_shape) - 2  # NC...
-    elif output_shape:
+    elif output_shape is not None:
         poolnd = len(output_shape) - 2  # NC...
     assert 2 <= poolnd <= 3, 'only pool2d and pool3d is supported'
 
@@ -568,7 +578,7 @@ def _interpolate(prog, inputs, outputs, attrs, value_infos, name=''):
             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
+    scale = None if scales is None else scales[2]
     # try input shape
     if scale is None:
         assert out_shape_, 'neither scales nor output shape is available'
@@ -613,24 +623,24 @@ def _interpolate(prog, inputs, outputs, attrs, value_infos, name=''):
 
 def AdaptiveAveragePool(prog, inputs, outputs, attrs, *args, name='', **kwargs):
     """
-	aten::adaptive_avg_poolnd
-	"""
+    aten::adaptive_avg_poolnd
+    """
 
     return _adaptive_pool(prog, 'avg', inputs, outputs, attrs, name=name)
 
 
 def AdaptiveMaxPool(prog, inputs, outputs, attrs, *args, name='', **kwargs):
     """
-	aten::adaptive_max_poolnd
-	"""
+    aten::adaptive_max_poolnd
+    """
 
     return _adaptive_pool(prog, 'max', inputs, outputs, attrs, name=name)
 
 
 def AffineGrid(prog, inputs, outputs, attrs, *args, name='', **kwargs):
     """
-	aten::affine_grid
-	"""
+    aten::affine_grid
+    """
 
     # I/O
     val_theta, = inputs
@@ -672,8 +682,8 @@ def AveragePool(prog,
                 *args,
                 **kwargs):
     """
-	onnx::AveragePool-10:
-	"""
+    onnx::AveragePool-10:
+    """
 
     return _pool(prog, 'avg', inputs, outputs, attrs, value_infos, name=name)
 
@@ -688,8 +698,8 @@ def BatchNormalization(prog,
                        *args,
                        **kwargs):
     """
-	onnx::BatchNormalization-9:
-	"""
+    onnx::BatchNormalization-9:
+    """
 
     # I/O
     val_x, val_scale, val_b, val_mean, val_var = inputs
@@ -704,16 +714,19 @@ def BatchNormalization(prog,
     momentum = attrs.get('momentum', .9)  # optional
     epsilon = attrs.get('epsilon', 1e-5)  # optional
     name_attr = ', name={}'.format(repr(name)) if name else ''
+    if embed_params:
+        embed_params = _check_embeddable(value_infos, val_scale, val_b,
+                                         val_mean, val_var)
     if embed_params:
         assert name != ''
         var_scale = name + '.w_0'
         var_b = name + '.b_0'
         var_mean = name + '.w_1'
         var_var = name + '.w_2'
-        value_infos[val_scale].setdefault('embeded_as', []).append(var_scale)
-        value_infos[val_b].setdefault('embeded_as', []).append(var_b)
-        value_infos[val_mean].setdefault('embeded_as', []).append(var_mean)
-        value_infos[val_var].setdefault('embeded_as', []).append(var_var)
+        value_infos[val_scale]['embeded_as'].append(var_scale)
+        value_infos[val_b]['embeded_as'].append(var_b)
+        value_infos[val_mean]['embeded_as'].append(var_mean)
+        value_infos[val_var]['embeded_as'].append(var_var)
         param_attr = ''
     else:
         var_scale = _make_var_name(val_scale)
@@ -760,8 +773,8 @@ def BatchNormalization(prog,
 
 def Cast(prog, inputs, outputs, attrs, value_infos, *args, **kwargs):
     """
-	onnx::Cast-9:
-	"""
+    onnx::Cast-9:
+    """
 
     # I/O
     val_input, = inputs
@@ -774,7 +787,7 @@ def Cast(prog, inputs, outputs, attrs, value_infos, *args, **kwargs):
     if not isinstance(dtype, _np.dtype):  # additional: possible np.dtype
         dtype = TENSOR_TYPE_TO_NP_TYPE[dtype]
     output_dtype = _dtype_or_none(value_infos, val_output)
-    if output_dtype:
+    if output_dtype is not None:
         assert dtype == output_dtype, 'dtype of to unmatches output'
 
     fluid_op = 'cast'
@@ -804,8 +817,8 @@ def Cast(prog, inputs, outputs, attrs, value_infos, *args, **kwargs):
 
 def Concat(prog, inputs, outputs, attrs, *args, name='', **kwargs):
     """
-	onnx::Concat-4:
-	"""
+    onnx::Concat-4:
+    """
 
     # I/O
     val_concat_result, = outputs
@@ -839,11 +852,11 @@ def Concat(prog, inputs, outputs, attrs, *args, name='', **kwargs):
 
 def Constant(prog, inputs, outputs, attrs, value_infos, *args, **kwargs):
     """
-	onnx::Constant-9:
-	"""
+    onnx::Constant-9:
+    """
 
     # I/O
-    assert len(inputs) == 0
+    assert len(inputs) == 0, 'constant op accept no inputs'
     val_output, = outputs
     var_output = _make_var_name(val_output)
 
@@ -851,7 +864,7 @@ def Constant(prog, inputs, outputs, attrs, value_infos, *args, **kwargs):
     value = attrs['value']  # required
     dtype = _np.dtype(value.dtype)
     output_dtype = _dtype_or_none(value_infos, val_output)
-    if output_dtype:
+    if output_dtype is not None:
         assert dtype == output_dtype, 'tensor dtype unmatches storage dtype'
 
 
@@ -900,8 +913,8 @@ def Constant(prog, inputs, outputs, attrs, value_infos, *args, **kwargs):
 
 def ConstantOfShape(prog, inputs, outputs, attrs, value_infos, *args, **kwargs):
     """
-	onnx::ConstantOfShape-9:
-	"""
+    onnx::ConstantOfShape-9:
+    """
 
     # I/O
     val_shape, = inputs
@@ -939,8 +952,8 @@ def Conv(prog,
          *args,
          **kwargs):
     """
-	onnx::Conv-1:
-	"""
+    onnx::Conv-1:
+    """
 
     # I/O
     val_x, val_w = inputs[:2]
@@ -970,13 +983,16 @@ def Conv(prog,
     paddings, val_x = _pad_if_asymmetric(prog, pads, val_x, value_infos)
     var_x = _make_var_name(val_x)
     name_attr = ', name={}'.format(repr(name)) if name else ''
+    if embed_params:
+        embed_params = (_check_embeddable(value_infos, val_w) and not has_bias
+                        or _check_embeddable(value_infos, val_b))
     if embed_params:
         assert name != ''
         var_w = name + '.w_0'
-        value_infos[val_w].setdefault('embeded_as', []).append(var_w)
+        value_infos[val_w]['embeded_as'].append(var_w)
         if has_bias:
             var_b = name + '.b_0'
-            value_infos[val_b].setdefault('embeded_as', []).append(var_b)
+            value_infos[val_b]['embeded_as'].append(var_b)
             param_attr = ''
         else:
             param_attr = ', bias_attr=False'
@@ -1046,8 +1062,8 @@ def ConvTranspose(prog,
                   *args,
                   **kwargs):
     """
-	onnx::ConvTranspose-1:
-	"""
+    onnx::ConvTranspose-1:
+    """
 
     # I/O
     val_x, val_w = inputs[:2]
@@ -1080,13 +1096,16 @@ def ConvTranspose(prog,
     paddings, val_x = _pad_if_asymmetric(prog, pads, val_x, value_infos)
     var_x = _make_var_name(val_x)
     name_attr = ', name={}'.format(repr(name)) if name else ''
+    if embed_params:
+        embed_params = (_check_embeddable(value_infos, val_w) and not has_bias
+                        or _check_embeddable(value_infos, val_b))
     if embed_params:
         assert name != ''
         var_w = name + '.w_0'
-        value_infos[val_w].setdefault('embeded_as', []).append(var_w)
+        value_infos[val_w]['embeded_as'].append(var_w)
         if has_bias:
             var_b = name + '.b_0'
-            value_infos[val_b].setdefault('embeded_as', []).append(var_b)
+            value_infos[val_b]['embeded_as'].append(var_b)
             param_attr = ''
         else:
             param_attr = ', bias_attr=False'
@@ -1167,8 +1186,8 @@ def ConvTranspose(prog,
 
 def Gemm(prog, inputs, outputs, attrs, value_infos, name, *args, **kwargs):
     """
-	onnx::Gemm-9:
-	"""
+    onnx::Gemm-9:
+    """
 
     # due to fluid fc don't support transposed weight, we use matmul + ew_add
     val_a, val_b, val_c = inputs
@@ -1259,8 +1278,8 @@ def GlobalAveragePool(prog,
                       *args,
                       **kwargs):
     """
-	onnx::GlobalAveragePool-1:
-	"""
+    onnx::GlobalAveragePool-1:
+    """
 
     return _global_pool(prog,
                         'avg',
@@ -1280,8 +1299,8 @@ def GlobalMaxPool(prog,
                   *args,
                   **kwargs):
     """
-	onnx::GlobalMaxPool-1:
-	"""
+    onnx::GlobalMaxPool-1:
+    """
 
     return _global_pool(prog,
                         'max',
@@ -1295,8 +1314,8 @@ def GlobalMaxPool(prog,
 def MaxPool(prog, inputs, outputs, attrs, value_infos, name='', *args,
             **kwargs):
     """
-	onnx::MaxPool-10:
-	"""
+    onnx::MaxPool-10:
+    """
 
     return _pool(prog, 'max', inputs, outputs, attrs, value_infos, name=name)
 
@@ -1304,16 +1323,16 @@ def MaxPool(prog, inputs, outputs, attrs, value_infos, name='', *args,
 def MaxRoiPool(prog, inputs, outputs, attrs, value_infos, name, *args,
                **kwargs):
     """
-	onnx::MaxRoiPool-1:
-	"""
+    onnx::MaxRoiPool-1:
+    """
 
     _roi_pool(prog, 'roi_pool', inputs, outputs, attrs, value_infos, name)
 
 
 def Pad(prog, inputs, outputs, attrs, value_infos, name='', *args, **kwargs):
     """
-	onnx::Pad-2:
-	"""
+    onnx::Pad-2:
+    """
 
     # I/O
     val_data, = inputs
@@ -1330,9 +1349,9 @@ def Pad(prog, inputs, outputs, attrs, value_infos, name='', *args, **kwargs):
     assume_pad2d = False
     if len(pads) == 4:
         assume_pad2d |= mode != 'constant'
-        if data_shape:
+        if data_shape is not None:
             assume_pad2d |= data_shape and len(data_shape) == 4  # NCHW
-        if output_shape:
+        if output_shape is not None:
             assume_pad2d |= output_shape and len(output_shape) == 4  # NCHW
     od_attrs = {'pad_value': value}
     if assume_pad2d:
@@ -1383,8 +1402,8 @@ def PRelu(prog,
           *args,
           **kwargs):
     """
-	onnx::PRelu-9:
-	"""
+    onnx::PRelu-9:
+    """
 
     # I/O
     val_x, val_slope = inputs
@@ -1404,10 +1423,12 @@ def PRelu(prog,
                 mode = 'element'
     fluid_op = 'prelu'
     name_attr = ', name={}'.format(repr(name)) if name else ''
+    if embed_params:
+        embed_params = _check_embeddable(value_infos, val_slope)
     if embed_params:
         assert name != ''
         var_slope = name + '.w_0'
-        value_infos[val_slope].setdefault('embeded_as', []).append(var_slope)
+        value_infos[val_slope]['embeded_as'].append(var_slope)
         param_attr = ''
     else:
         var_slope = _make_var_name(val_slope)
@@ -1436,16 +1457,16 @@ def PRelu(prog,
 
 def PsRoiPool(prog, inputs, outputs, attrs, value_infos, name, *args, **kwargs):
     """
-	caffe2::PsRoiPool
-	"""
+    caffe2::PsRoiPool
+    """
 
     _roi_pool(prog, 'psroi_pool', inputs, outputs, attrs, value_infos, name)
 
 
 def Reshape(prog, inputs, outputs, attrs, value_infos, name, *args, **kwargs):
     """
-	onnx::Reshape-5:
-	"""
+    onnx::Reshape-5:
+    """
 
     # I/O
     val_data, val_shape = inputs
@@ -1474,6 +1495,8 @@ def Reshape(prog, inputs, outputs, attrs, value_infos, name, *args, **kwargs):
     name_attr = ', name={}'.format(repr(name)) if name else ''
 
     # generation
+    val_shape_int32 = val_shape + '_int32'  # explicit variable
+    var_shape_int32 = _make_var_name(val_shape_int32)
     prog.Code('# shape:{}={} # const as literal'.format(var_shape, shape))
     if is_const_shape:
         prog.Code('{} = layers.{}({}'
@@ -1487,8 +1510,6 @@ def Reshape(prog, inputs, outputs, attrs, value_infos, name, *args, **kwargs):
                       name_attr,
                   ))
     else:
-        val_shape_int32 = val_shape + '_int32'  # explicit variable
-        var_shape_int32 = _make_var_name(val_shape_int32)
         prog.Op(
             '',
             'Cast',
@@ -1514,34 +1535,26 @@ def Reshape(prog, inputs, outputs, attrs, value_infos, name, *args, **kwargs):
     var_xshape = name + '.xshape'  # dummy output
     prog.VarDesc(var_reshaped)
     prog.VarDesc(var_xshape)
-    if is_const_shape:
-        prog.OpDesc(
-            fluid_op,
-            ([var_data], 'X'),
-            ([var_reshaped, var_xshape], 'Out', 'XShape'),
-            {'shape': shape},
-        )
-    else:
-        prog.OpDesc(
-            fluid_op,
-            ([var_data, var_shape_int32], 'X', 'Shape'),
-            ([var_reshaped, var_xshape], 'Out', 'XShape'),
-            {'shape': shape},
-        )
+    prog.OpDesc(
+        fluid_op,
+        ([var_data, var_shape_int32], 'X', 'Shape'),
+        ([var_reshaped, var_xshape], 'Out', 'XShape'),
+        {'shape': shape},
+    )
 
 
 def Resize(prog, inputs, outputs, attrs, value_infos, name='', *args, **kwargs):
     """
-	onnx::Resize-10:
-	"""
+    onnx::Resize-10:
+    """
 
     return _interpolate(prog, inputs, outputs, attrs, value_infos, name=name)
 
 
 def RoiAlign(prog, inputs, outputs, attrs, value_infos, name, *args, **kwargs):
     """
-	caffe2::RoiAlign
-	"""
+    caffe2::RoiAlign
+    """
 
     _roi_pool(prog, 'roi_align', inputs, outputs, attrs, value_infos, name)
 
@@ -1580,8 +1593,8 @@ def RoiAlign(prog, inputs, outputs, attrs, value_infos, name, *args, **kwargs):
 
 def Slice(prog, inputs, outputs, attrs, value_infos, *args, **kwargs):
     """
-	onnx::Slice-1:9
-	"""
+    onnx::Slice-1:9
+    """
 
     # I/O
     val_data, = inputs
@@ -1595,7 +1608,7 @@ def Slice(prog, inputs, outputs, attrs, value_infos, *args, **kwargs):
     starts = attrs['starts']  # required
     ends = attrs['ends']  # required
     shape = _shape_or_none(value_infos, val_data)
-    if shape:
+    if shape is not None:
         #        ndims = len(shape)
         #        for idx, value in enumerate(axes):
         #            if value > ONNX_INT_MAX // 2:
@@ -1639,8 +1652,8 @@ def Slice(prog, inputs, outputs, attrs, value_infos, *args, **kwargs):
 
 def Split(prog, inputs, outputs, attrs, *args, name='', **kwargs):
     """
-	onnx::Split-2:
-	"""
+    onnx::Split-2:
+    """
 
     # I/O
     val_input, = inputs
@@ -1680,8 +1693,8 @@ def Split(prog, inputs, outputs, attrs, *args, name='', **kwargs):
 
 def Sum(prog, inputs, outputs, *args, **kwargs):
     """
-	onnx::Sum-8:
-	"""
+    onnx::Sum-8:
+    """
 
     # I/O
     val_sum, = outputs
@@ -1710,8 +1723,8 @@ def Sum(prog, inputs, outputs, *args, **kwargs):
 
 def Tile(prog, inputs, outputs, attrs, value_infos, name='', *args, **kwargs):
     """
-	onnx::Tile-1:
-	"""
+    onnx::Tile-1:
+    """
 
     # I/O
     val_input, val_repeats = inputs
@@ -1749,8 +1762,8 @@ def Tile(prog, inputs, outputs, attrs, value_infos, name='', *args, **kwargs):
 
 def Transpose(prog, inputs, outputs, attrs, *args, name='', **kwargs):
     """
-	onnx::Transpose-1:
-	"""
+    onnx::Transpose-1:
+    """
 
     # I/O
     val_data, = inputs
@@ -1795,8 +1808,8 @@ def Upsample(prog,
              *args,
              **kwargs):
     """
-	onnx::Upsample-9:9
-	"""
+    onnx::Upsample-9:9
+    """
 
     return _interpolate(prog, inputs, outputs, attrs, value_infos, name=name)
 
diff --git a/onnx2fluid/onnx2fluid/torch_export_helper.py b/onnx2fluid/onnx2fluid/torch_export_helper.py
index 7a667b65d8bf3e22557a25b2e3162658d000801c..7a0fd6031433e989fafc142a40e9bad46df9f41f 100644
--- a/onnx2fluid/onnx2fluid/torch_export_helper.py
+++ b/onnx2fluid/onnx2fluid/torch_export_helper.py
@@ -25,7 +25,8 @@ def ensure_tuple(obj):
 
 
 def flatten_list(obj, out=None):
-    assert isinstance(obj, list)
+    assert isinstance(obj, list), 'list type required'
+
     if out is None:
         out = type(obj)()
     for item in obj:
@@ -38,11 +39,11 @@ def flatten_list(obj, out=None):
 
 def export_data(state_dict, prefix=''):
     """
-	export binary data with meta text for raw C++ inference engines
-	"""
+    export binary data with meta text for raw C++ inference engines
+    """
 
     def str_(obj):
-        if isinstance(obj, (tuple, list)):
+        if isinstance(obj, (tuple, list, set)):
             return str(obj)[1:-1].replace(' ', '')
         return str(obj)
 
@@ -72,8 +73,8 @@ def export_onnx_with_validation(model,
                                 *args,
                                 **kwargs):
     """
-	export PyTorch model to ONNX model and export sample inputs and outputs in a Numpy file
-	"""
+    export PyTorch model to ONNX model and export sample inputs and outputs in a Numpy file
+    """
 
     is_tuple_or_list = lambda x: isinstance(x, (tuple, list))
 
diff --git a/onnx2fluid/onnx2fluid/validation.py b/onnx2fluid/onnx2fluid/validation.py
index dc679df05093b0e9f21c2ea15eca07e308033892..223e1116fdd652c525a6f713e9d813eef7478c1c 100644
--- a/onnx2fluid/onnx2fluid/validation.py
+++ b/onnx2fluid/onnx2fluid/validation.py
@@ -10,14 +10,15 @@ import importlib, logging, os, sys
 
 
 def flatten_dict(obj, out=None):
-    assert isinstance(obj, dict)
+    assert isinstance(obj, dict), 'dict type required'
+
     if out is None:
         out = type(obj)()
     for key, value in obj.items():
         if isinstance(value, dict):
             flatten_dict(value, out)
         else:
-            assert key not in out
+            assert key not in out, 'key conflicted'
             out[key] = value
     return out
 
@@ -29,15 +30,16 @@ def ensure_list(obj):
 
 
 def validate(fluid_model_filename,
-             golden_data_filename,
-             model_func_name='inference',
+             golden_data_filename='',
              atol=1e-3,
              rtol=1e-3,
+             model_func_name='inference',
              save_inference_model=False,
+             inference_input_names=None,
              **kwargs):
     """
-	inference the converted Paddle fluid model, validate with given golden data
-	"""
+    inference the converted Paddle fluid model, validate with given golden data
+    """
 
     import numpy as np
     import paddle.fluid as fluid
@@ -86,24 +88,50 @@ def validate(fluid_model_filename,
         raise ValueError('unsupported Paddle fluid model filename')
 
     # load data
-    logger.info('using golden data %s', golden_data_filename)
-    if golden_data_filename.endswith('.npz'):
-        test_data = np.load(golden_data_filename, encoding='bytes')
-        input_data = test_data['inputs'].tolist()
-        output_data = test_data['outputs'].tolist()
+    if golden_data_filename:
+        logger.info('using golden data %s', golden_data_filename)
+        if golden_data_filename.endswith('.npz'):
+            test_data = np.load(golden_data_filename, encoding='bytes')
+            input_data = test_data['inputs'].tolist()
+            output_data = test_data['outputs'].tolist()
+        else:
+            test_data = np.load(golden_data_filename, encoding='bytes').tolist()
+            input_data = test_data['inputs']
+            output_data = test_data['outputs']
+        input_data = flatten_dict(input_data)
+        output_data = flatten_dict(output_data)
+        input_names = input_data.keys()
+        logger.info('found %d I/O golden data, starting test ...',
+                    len(input_data) + len(output_data))
     else:
-        test_data = np.load(golden_data_filename, encoding='bytes').tolist()
-        input_data = test_data['inputs']
-        output_data = test_data['outputs']
-    input_data = flatten_dict(input_data)
-    output_data = flatten_dict(output_data)
-    logger.info('found %d I/O golden data, starting test ...',
-                len(input_data) + len(output_data))
-
-    # DEBUG: reload test for Python code
-    if basename.endswith('.py') and save_inference_model:
+        assert inference_input_names, 'input names required for type-shape inference'
+
+        input_names = inference_input_names
+        logger.info('using input names: %s', ', '.join(input_names))
+
+    # type-shape inference and re-save
+    if save_inference_model:
+        for block in prog.blocks:
+            block_desc = block.desc
+            for idx_op in range(block_desc.op_size()):
+                op_desc = block_desc.op(idx_op)
+                if op_desc.type() in ('feed', 'fetch'):
+                    continue
+                op_desc.infer_var_type(block_desc)
+                op_desc.infer_shape(block_desc)
+            for var_name, var in block.vars.items():
+                var_desc = var.desc
+                if var_desc.type() != fluid.core.VarDesc.VarType.LOD_TENSOR:
+                    continue
+                # WORKAROUND: dirty way to give dtype to partial-infered vars
+                # which could not be cleared!
+                try:
+                    var.to_string(True)
+                except ValueError:
+                    var_desc.set_dtype(fluid.core.VarDesc.VarType.FP32)
+
         fluid.io.save_inference_model(fluid_model_dir,
-                                      input_data.keys(),
+                                      input_names,
                                       var_outs,
                                       exe,
                                       main_program=prog,
@@ -112,8 +140,12 @@ def validate(fluid_model_filename,
         fluid.io.load_inference_model(fluid_model_dir, exe)
         logger.info('model re-load passed')
 
+    if not golden_data_filename:
+        return True
+
     # execute
-    outputs = exe.run(prog, feed=input_data, fetch_list=out_names)
+    outputs = exe.run(prog, feed=input_data,
+                      fetch_list=out_names)  # out_names can be vars
     logger.info('execution passed')
 
     # validate
@@ -134,11 +166,10 @@ def validate(fluid_model_filename,
         logger.info('accuracy passed')
     else:
         logger.info('accuracy not passed')
-
     return passed
 
 
-if __name__ == '__main__':
+def main():
     import argparse
 
     parser = argparse.ArgumentParser(
@@ -160,6 +191,7 @@ if __name__ == '__main__':
         '--test_data',
         '-t',
         type=str,
+        default='',
         help='I/O golden data for validation, e.g. test.npy, test.npz',
     )
     parser.add_argument(
@@ -175,19 +207,36 @@ if __name__ == '__main__':
         default=1e-2,
         help='assertion relative tolerance for validation',
     )
+    parser.add_argument(
+        '--infer_inputs',
+        '-i',
+        nargs='?',
+        default=None,
+        const='',
+        help=
+        'perform type-shape inference with given input names and re-save model',
+    )
     args = parser.parse_args()
 
     logging_format = '[%(levelname)8s]%(name)s::%(funcName)s:%(lineno)04d: %(message)s'
     logging_level = logging.DEBUG if args.debug else logging.INFO
     logging.basicConfig(format=logging_format, level=logging_level)
 
-    debug = args.debug
+    #	debug = args.debug
     fluid_model_filename = args.model[0]
     golden_data_filename = args.test_data
     atol, rtol = args.atol, args.rtol
+    save_inference_model = args.infer_inputs is not None
+    inference_input_names = args.infer_inputs.split(
+        ',') if args.infer_inputs else None
 
     validate(fluid_model_filename,
-             golden_data_filename,
+             golden_data_filename=golden_data_filename,
              atol=atol,
              rtol=rtol,
-             save_inference_model=debug)
+             save_inference_model=save_inference_model,
+             inference_input_names=inference_input_names)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/onnx2fluid/onnx2fluid/writer.py b/onnx2fluid/onnx2fluid/writer.py
index c6aba4b61feaa5d7d4f045748706c008643245b0..70bd72765e067538230c5e5644d994af8d902099 100644
--- a/onnx2fluid/onnx2fluid/writer.py
+++ b/onnx2fluid/onnx2fluid/writer.py
@@ -44,6 +44,8 @@ def irepr(obj, to='_'):
 
 
 def flatten_list(obj, out=None):
+    assert isinstance(obj, list), 'list type required'
+
     if out is None:
         out = type(obj)()
     for item in obj:
@@ -56,12 +58,12 @@ def flatten_list(obj, out=None):
 
 def make_attr_name(name):
     """
-	make a valid code name for ParamAttr
-	"""
+    make a valid code name for ParamAttr
+    """
 
-    if name == '':
-        raise ValueError('name should not be empty')
-    for s in ' \\|/:':  #
+    assert name != '', 'name should not be empty'
+
+    for s in ' \\|/:-':  #
         name = name.replace(s, '_')
     if not name.startswith('_'):
         name = '_' + name
@@ -70,8 +72,8 @@ def make_attr_name(name):
 
 class Program(object):
     """
-	fluid Python code and ProgramDesc wrapper
-	"""
+    fluid Python code and ProgramDesc wrapper
+    """
 
     DTYPE_TO_FRAMEWORK_DTYPE = {
         'bool': framework_pb2.VarType.BOOL,
@@ -88,8 +90,8 @@ class Program(object):
     @staticmethod
     def Dtype(dtype):
         """
-		convert dtype to fulid framework dtype
-		"""
+        convert dtype to fulid framework dtype
+        """
 
         dtype = np.dtype(dtype).name
         return Program.DTYPE_TO_FRAMEWORK_DTYPE[dtype]
@@ -97,8 +99,8 @@ class Program(object):
     @staticmethod
     def OpDescVars(vals, *keys):
         """
-		make (OpDesc.Var)s
-		"""
+        make (OpDesc.Var)s
+        """
 
         od_vars = []
         for idx, key in enumerate(keys):
@@ -112,8 +114,8 @@ class Program(object):
     @staticmethod
     def OpDescAttrs(attrs):
         """
-		make (OpDesc.Attr)s
-		"""
+        make (OpDesc.Attr)s
+        """
 
         od_attrs = []
         for key, value in attrs.items():
@@ -178,8 +180,8 @@ class Program(object):
 
     def Code(self, code):
         """
-		add Python code
-		"""
+        add Python code
+        """
 
         if self.code_mutable:
             self.codes.append(code)
@@ -190,16 +192,16 @@ class Program(object):
                output_val_keys=None,
                attrs=None):
         """
-		add OpDesc
-		"""
+        add OpDesc
+        """
 
         desc = framework_pb2.OpDesc()
         desc.type = op_type
-        if input_val_keys is not None:
+        if input_val_keys:
             desc.inputs.extend(self.OpDescVars(*input_val_keys))
-        if output_val_keys is not None:
+        if output_val_keys:
             desc.outputs.extend(self.OpDescVars(*output_val_keys))
-        if attrs is not None:
+        if attrs:
             desc.attrs.extend(self.OpDescAttrs(attrs))
         self.op_descs.append(desc)
         return desc
@@ -210,8 +212,8 @@ class Program(object):
                 value_info=None,
                 remove_batch=None):
         """
-		add VarDesc,
-		"""
+        add VarDesc,
+        """
 
         assert var_name not in self.var_descs, 'var naming conflicted'
 
@@ -220,13 +222,16 @@ class Program(object):
         var_desc.persistable = persistable
         var_desc.type.type = framework_pb2.VarType.LOD_TENSOR
         self.var_descs[var_name] = var_desc
+
         if value_info:
-            self.VarTypeInfo(var_name, value_info, remove_batch=remove_batch)
+            self.VarTypeShapeInfo(var_name,
+                                  value_info,
+                                  remove_batch=remove_batch)
 
     def Op(self, domain, op_type, *args, **kwargs):
         """
-		convert an ONNX op and add it to program
-		"""
+        convert an ONNX op and add it to program
+        """
 
         if domain != '':  # TODO: symbolic file routing by domain
             raise ValueError('only default domain supported')
@@ -242,8 +247,8 @@ class Program(object):
 
     def IntermediateOp(self, domain, op_type, *args, **kwargs):
         """
-		convert an intermediate ONNX op declaring in desc program only
-		"""
+        convert an intermediate ONNX op declaring in desc program only
+        """
 
         code_mutable = self.code_mutable
         self.code_mutable = False
@@ -255,10 +260,10 @@ class Program(object):
         else:
             self.code_mutable = code_mutable
 
-    def VarTypeInfo(self, var_name, value_info, remove_batch=None):
+    def VarTypeShapeInfo(self, var_name, value_info, remove_batch=None):
+        """
+        set value_info for var
         """
-		set value_info for var
-		"""
 
         if var_name not in self.var_descs:
             return
@@ -284,8 +289,8 @@ class Program(object):
 
 class Writer(object):
     """
-	fluid code and desc writter
-	"""
+    fluid code and desc writter
+    """
 
     #	CODE_INDENT = ' ' * 4
     CODE_INDENT = '\t'
@@ -293,8 +298,8 @@ class Writer(object):
     @staticmethod
     def header_code(func_name, info=''):
         """
-		Python header codes
-		"""
+        Python header codes
+        """
 
         codes = []
         codes.append('"""')
@@ -315,8 +320,8 @@ class Writer(object):
     def emit_op(prog, name, domain, op_type, inputs, outputs, attrs,
                 value_infos, *args, **kwargs):
         """
-		emit an ONNX op into program
-		"""
+        emit an ONNX op into program
+        """
 
         prog.Code('# {}, {}::{}: {} -> {}, {}'.format(name, domain, op_type,
                                                       inputs, outputs,
@@ -334,8 +339,8 @@ class Writer(object):
     @staticmethod
     def emit_param(prog, name, value_info):
         """
-		emit an ONNX weight into program
-		"""
+        emit an ONNX weight into program
+        """
 
         if value_info.get('embeded_as', []):
             var_names = value_info['embeded_as']
@@ -359,8 +364,8 @@ class Writer(object):
     @staticmethod
     def emit_inputs(prog, names, value_infos, remove_batch=None):
         """
-		emit ONNX inputs into program
-		"""
+        emit ONNX inputs into program
+        """
 
         for idx, name in enumerate(names):
             var_name = make_var_name(name)
@@ -396,8 +401,8 @@ class Writer(object):
     @staticmethod
     def emit_outputs(prog, names):  #, value_infos
         """
-		emit ONNX outputs into program
-		"""
+        emit ONNX outputs into program
+        """
 
         code = 'return '
         for idx, name in enumerate(names):
@@ -416,8 +421,8 @@ class Writer(object):
     @staticmethod
     def add_codes(codes, others, indent):
         """
-		flatten codes in program
-		"""
+        flatten codes in program
+        """
 
         for code in flatten_list(others):
             codes.append(Writer.CODE_INDENT * indent + code)
@@ -426,11 +431,10 @@ class Writer(object):
     @staticmethod
     def write_weight(weight, filename):
         """
-		write single weight in fluid desc
-		"""
+        write single weight in fluid desc
+        """
 
-        if not isinstance(weight, np.ndarray):
-            raise TypeError('weight is not an ndarray')
+        assert isinstance(weight, np.ndarray), 'weight is not an ndarray'
 
         tensor_desc = framework_pb2.VarType.TensorDesc()
         tensor_desc.data_type = Program.Dtype(weight.dtype)
@@ -448,12 +452,11 @@ class Writer(object):
     @staticmethod
     def write_weights(weights, save_dir):
         """
-		write multiple weights in each fluid desc
-		"""
+        write multiple weights in each fluid desc
+        """
 
         for name, weight in weights.items():
-            if not isinstance(weights, dict):
-                raise TypeError('dict type weights required')
+            assert isinstance(weights, dict), 'dict type weights required'
 
             var_name = make_var_name(name)
             filename = os.path.join(save_dir, var_name)
@@ -463,8 +466,8 @@ class Writer(object):
     @staticmethod
     def write_code_file(filename, header_code, *body_codes):
         """
-		write Python code to file
-		"""
+        write Python code to file
+        """
 
         codes = []
         Writer.add_codes(codes, header_code, 0)
@@ -481,8 +484,8 @@ class Writer(object):
     @staticmethod
     def write_desc_file(filename, op_descs, var_descs):
         """
-		write desc program to file
-		"""
+        write desc program to file
+        """
 
         prog_desc = framework_pb2.ProgramDesc()
         block_desc = prog_desc.blocks.add()
diff --git a/onnx2fluid/setup.cfg b/onnx2fluid/setup.cfg
index 96f0f9b2a28ad6cc5302debc7aac4dd8c79928ea..bf59c1fe961108f01413d397a1d90a9bf0bd986b 100644
--- a/onnx2fluid/setup.cfg
+++ b/onnx2fluid/setup.cfg
@@ -54,8 +54,8 @@ zip_safe = True
 [options.entry_points]
 console_scripts =
 	onnx2fluid = onnx2fluid.__main__
-	onnx2fluid_convert = onnx2fluid.conversion
-	onnx2fluid_validate = onnx2fluid.validation
+	onnx2fluid_convert = onnx2fluid.conversion:main
+	onnx2fluid_validate = onnx2fluid.validation:main
 
 # 可以通过以下配置向包中添加conf或data等非py文件，安装时会一同安装到site-packages目录下
 # 仅支持文件，不支持目录，但可以使用通配