code: def get_module_by_name(model, module_name):
      """
      Get a module specified by its module name
  
      Parameters
      ----------
      model : pytorch model
          the pytorch model from which to get its module
      module_name : str
          the name of the required module
  
      Returns
      -------
      module, module
          the parent module of the required module, the required module
      """
      name_list = module_name.split(".")
      for name in name_list[:-1]:
          if hasattr(model, name):
              model = getattr(model, name)
          else:
              return None, None
      if hasattr(model, name_list[-1]):
          leaf_module = getattr(model, name_list[-1])
          return model, leaf_module
      else:
          return None, None
  
label_desc: Use image node_id 1 for calling a global function with example usage: get_module_by_name(model, module_name) and returns: model,  leaf_module, None,  None, None,  None