docstr: Build the channel dependency for the conv layers
  in the model.
docstr_tok: ["Build","the","channel","dependency","for","the","conv","layers","in","the","model","."]
code: def build_dependency(self):
      """
      Build the channel dependency for the conv layers
      in the model.
      """
      # unpack the tuple/list manually before analyze the
      # channel dependency
      self.graph.unpack_manually()
      for node in self.graph.nodes_py.nodes_op:
          parent_layers = []
          # find the node that contains aten::add
          # or aten::cat operations
          if node.op_type in ADD_TYPES:
              parent_layers = self._get_parent_layers(node)
          elif node.op_type == CAT_TYPE:
              # To determine if this cat operation will introduce channel
              # dependency, we need the specific input parameters of the cat
              # opertion. To get the input parameters of the cat opertion, we
              # need to traverse all the cpp_nodes included by this NodePyGroup,
              # because, TorchModuleGraph merges the important nodes and the adjacent
              # unimportant nodes (nodes started with prim::attr, for example) into a
              # NodepyGroup.
              cat_dim = None
              for cnode in node.node_cpps:
                  if cnode.kind() == CAT_TYPE:
                      cat_dim = list(cnode.inputs())[1].toIValue()
                      break
              if cat_dim != 1:
                  parent_layers = self._get_parent_layers(node)
          dependency_set = set(parent_layers)
          # merge the dependencies
          for parent in parent_layers:
              if parent in self.dependency:
                  dependency_set.update(self.dependency[parent])
          # save the dependencies
          for _node in dependency_set:
              self.dependency[_node] = dependency_set
  
imports: import csv
  import logging
label_desc: Use image node_id 3 for calling the ChannelDependency obj's underlying member method code with example usage: obj.build_dependency() without return types