code: def buf2PIL(self, txn, key, type="RGB"):
      imgbuf = txn.get(key)
      buf = six.BytesIO()
      buf.write(imgbuf)
      buf.seek(0)
      im = Image.open(buf).convert(type)
      return im
  
imports: import numpy
  import os
  from paddle.io import Dataset
  import lmdb
  import cv2
  import string
  import six
  import pickle
  from PIL import Image
  from .imaug import transform, create_operators
label_desc: Use image node_id 1 for calling the LMDBDataSetSR obj's underlying member method code with example usage: obj.buf2PIL(txn, key, type) and returns: im