code: def add_docstring(doc):
      def func(f):
          f.__doc__ += (
              "\n======other docs from supper class ======\n%s" % doc
          )
          return f
  
      return func
  
imports: import os
  from tqdm import tqdm
  from paddlehub.common.logger import logger
  from paddlehub.common.dir import MODULE_HOME
label_desc: Use image node_id 2 for calling a global function with example usage: add_docstring(doc) and returns: func, f