code: def __enter__(self):
      return self
  
file_path: calamari/calamari_ocr/ocr/dataset/datareader/hdf5/hdf5_dataset_writer.py
imports: import numpy
  import h5py
  from tfaip import PipelineMode
label_desc: Use image node_id 2 for calling the Hdf5DatasetWriter obj's underlying member method code with example usage: obj.__enter__() and returns: self