code: def __len__(self):
      return len(self.data)
  
file_path: PaddleHub/paddlehub/datasets/flowers.py
imports: import os
  from typing import Callable, Tuple
  import paddle
  import numpy
  import paddlehub.env
  from paddlehub.utils.download import download_data
label_desc: Use image node_id 3 for calling the Flowers obj's underlying member method code with example usage: obj.__len__() and returns: len