code: def __init__(self, deco):
      msg = (
          "Flow already has a decorator '{deco}'. "
          "You can specify each decorator only once.".format(deco=deco)
      )
      super(DuplicateFlowDecoratorException, self).__init__(msg)
  
imports: from functools import partial
  import json
  import re
  import os
  import sys
  from .flowspec import FlowSpec
  from .exception import MetaflowInternalError, MetaflowException, InvalidDecoratorAttribute
  from metaflow._vendor import click
label_desc: Use image node_id 1 to create a new DuplicateFlowDecoratorException object from inherited base classes: MetaflowException with example: obj = DuplicateFlowDecoratorException(deco)