diff --git a/README.md b/README.md
index a44c458..ac62bfc 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,8 @@ pip install graphviz
 
 ```python
 import os
+
+# 将日志级别设置为6
 os.environ['GLOG_v'] = '6'
 
 import paddle
diff --git a/example.py b/example.py
index 606813d..39157f1 100644
--- a/example.py
+++ b/example.py
@@ -30,12 +30,27 @@ def forward(self, img):
         output = self.fc(feature.reshape([img.shape[0], -1]))
         return output
 
+class Transformer(nn.Layer):
+    def __init__(self) -> None:
+        super(Transformer, self).__init__()
+        encoder_layer = nn.TransformerEncoderLayer(128, 2, 512)
+        self.encoder = nn.TransformerEncoder(encoder_layer, 2)
+        
+
+    def forward(self, img):
+        img = self.encoder(img)
+        return img
+
+
 if __name__ == '__main__':
     
     # 定义网络
     model = Model()
     x = paddle.randn([1, 3, 32, 32])
 
+    # model = Transformer()
+    # x = paddle.randn([2, 4, 128])
+
     # 正向推理
     y = model(x)
 
diff --git a/images/result.png b/images/result.png
index a0d08f7..73696aa 100644
Binary files a/images/result.png and b/images/result.png differ
diff --git a/paddleviz/viz.py b/paddleviz/viz.py
index c0763e2..1f48b30 100644
--- a/paddleviz/viz.py
+++ b/paddleviz/viz.py
@@ -77,118 +77,125 @@ def add_output_tensor(var, color='darkolivegreen1'):
     return dot
 
 
-def processOPLog(str, op_id, dot):
-  """ extract edge info of operator from output log
-
-  :param str: the log of operator
-  :param op_id: the pointer of oparator
-  :param dot: the whole dot
-  """
-  start = str.find("Input")
-
-  while str[start] != '\n':
-    start += 1
+def add_edge_info(dot):
+  with open('./output.txt', encoding='utf-8') as f:
+    content = f.read()
+  
+  start = 0
 
-  start = str.find('(', start) + 1
+  while content.find('gradnode_ptr', start) != -1:
+    start = content.find('gradnode_ptr', start)
+    end = content.find('\n', start)
+    if content[end - 1] == '\r':
+      end -= 1
+    
+    start += 15
+    op_ptr = content[start: end].strip(' ')
+    
+    end = content.find("backward.cc:288", start)
 
-  end = str.find("Output")
+    op_log = content[start: end]
 
-  # handle node of input
-  p = start
+    # Get operator input and output objects according to the log
+    op_input_output = parseOpLog(op_log, op_ptr, dot)
 
-  # each line of the operator's input is processed in turn using a double pointer
-  while p != -1 and p < end:
+    
+def parseOpLog(op_log, op_ptr, dot):
+  """ 
+  extract edge info of operator from output log
 
-    # find carriage return
-    while str[p] != '\n':
-      p += 1
+  :param op_log: the log of operator
+  :param op_ptr: the pointer of oparator
+  :param dot: the whole dot
+  """
+  
+  op_input_output = {}
 
-    # find the properties of the edge
-    name = str[start + 1: str.find(',', start)].strip(' ')
-    
-    start = str.find("Ptr", start)
-    ptr = str[start + 5: str.find(',', start)]
+  op_log = op_log.replace('\n', ' ')
 
-    start = str.find("Dtype", start)
-    dtype = str[start + 7: str.find(',', start)]
+  start = op_log.find("Input")
 
-    start = str.find("Place", start)
-    place = str[start + 7: str.find(',', start)]
+  end = op_log.find("Output")
 
-    start = str.find("Shape", start)
-    shape = '[{}]'.format(str[start + 7: str.find(']', start)].strip(' '))
+  # Find the input parameters of the operator
+  op_input_output["input"] = parseMultiParam(op_log[start: end]) if start != -1 else []
 
-    p = str.find('(', p, end)
+  # Process the input parameters of the operator in turn
+  for param in op_input_output["input"]:
 
-    start = p
-    
-    if 'grad' not in name:
+    if 'grad' not in param["name"]:
       continue
 
-    print("input_op: {} -> {}".format(op_id, ptr))
+    param_ptr = param["ptr"]
 
-    if ptr not in grad_nodes:
-      grad_nodes[ptr] = {}
+    if param_ptr not in grad_nodes:
+      grad_nodes[param_ptr] = {}
 
     # if have previously recorded which operator output came from, need to add information on the side
-    if "output_op" in grad_nodes[ptr]:
-      edge_info = "dtype: {} \n place: {} \n shape: {} \n".format(dtype, place, shape)
-      dot.edge(grad_nodes[ptr]["output_op"], op_id, _attributes={'label': edge_info})
-    
-    
+    if "output_op" in grad_nodes[param_ptr]:
+      edge_info = "dtype: {} \n place: {} \n shape: {} \n".format(param["dtype"], param["place"], param["shape"])
+      dot.edge(grad_nodes[param_ptr]["output_op"], op_ptr, _attributes={'label': edge_info})
 
-  # handle node of output
-  start = end
-  while str[start] != '\n':
-    start += 1
 
-  start = str.find('(', start)
+  # Find the output parameters of the operator
+  op_input_output["output"] = parseMultiParam(op_log[end: ]) if end != -1 else []
 
-  end = len(str)
-  
-  p = start
+  # Process the output parameters of the operator in turn
+  for param in op_input_output["output"]:
+    param_ptr = param["ptr"]
 
-  # each line of the operator's output is processed in turn using a double pointer
-  while p != -1 and p < end:
+    if param_ptr not in grad_nodes:
+      grad_nodes[param_ptr] = {}
+    
+    grad_nodes[param_ptr]["output_op"] = op_ptr
 
-    # find carriage return
-    while p < end and str[p] != '\n':
-      p += 1
+  return op_input_output
 
-    # find the properties of the edge
-    name = str[start + 1: str.find(',', start)].strip(' ')
 
-    start = str.find("Ptr", start)
-    ptr = str[start + 5: str.find(',', start)]
+def parseMultiParam(multi_param_log):
+  multi_param = []
+  start, end = 0, len(multi_param_log)
 
-    if ptr not in grad_nodes:
-      grad_nodes[ptr] = {}
-    
-    grad_nodes[ptr]["output_op"] = op_id
-    print("output_op: {} -> {}".format(op_id, ptr))
+  while multi_param_log.find('(', start, end) != -1:
+    param_start = multi_param_log.find('(', start, end)
+    param_end = multi_param_log.find('}]),', start, end)
+    start = param_end + 1
+    # Converts a parameter string to an object
+    param = parseParam(multi_param_log[param_start + 1: param_end])
+    multi_param.append(param)
 
-    p = str.find('(', p, end)
-  
-    start = p
+  return multi_param
 
 
-def add_edge_info(dot):
-  with open('./output.txt', encoding='utf-8') as f:
-    content = f.read()
-  
+def parseParam(param_log):
+  param = {}
   start = 0
-
-  while content.find('gradnode_ptr', start) != -1:
-    start = content.find('gradnode_ptr', start)
-    end = content.find('\n', start)
-    if content[end - 1] == '\r':
-      end -= 1
-    
-    start += 15
-    op_ptr = content[start: end]
+  
+  name = param_log[start: param_log.find(',', start)].strip(' ')
+  param["name"] = name
     
-    end = content.find("backward.cc:288", start)
+  start = param_log.find("Ptr", start)
+  ptr = param_log[start + 5: param_log.find(',', start)].strip(' ')
+  param["ptr"] = ptr
+
+  start = param_log.find("Dtype", start)
+  if start == -1:
+    param["dtype"] = None
+    param["place"] = None
+    param["shape"] = None
+    return param
+  
+  dtype = param_log[start + 7: param_log.find(',', start)].strip(' ')
+  param["dtype"] = dtype
 
-    op_log = content[start: end]
+  start = param_log.find("Place", start)
+  place = param_log[start + 7: param_log.find(',', start)].strip(' ')
+  param["place"] = place
+
+  start = param_log.find("Shape", start)
+  shape = '[{}]'.format(param_log[start + 7: param_log.find(']', start)].strip(' '))
+  param["shape"] = shape
+
+  # print(param)
 
-    processOPLog(op_log, op_ptr, dot)
\ No newline at end of file
+  return param
\ No newline at end of file