code: def check_input_data(self, args):
      input_data = []
      if args.input_image:
          if not os.path.exists(args.input_image):
              raise RuntimeError(
                  "File %s is not exist." % args.input_image
              )
          else:
              input_data = args.input_image
  
      if input_data == []:
          raise RuntimeError(
              "The input data is inconsistent with expectations."
          )
  
      return input_data
  
file_path: PaddleHub/modules/text/text_generation/reading_pictures_writing_poems/module.py
imports: import argparse
  import ast
  import os
  from translate import Translator
  import paddlehub
  from paddlehub.module.module import moduleinfo
  from paddlehub.module.module import runnable
label_desc: Use image node_id 7 for calling the ReadingPicturesWritingPoems obj's underlying member method code with example usage: obj.check_input_data(args) and returns: input_data