code: def handle_IOReader(the_class):
      """add a read_bytes method"""
  
      def read_bytes(self, totsz):
          buf = bytearray(totsz)
          was_read = self(swig_ptr(buf), 1, len(buf))
          return bytes(buf[:was_read])
  
      the_class.read_bytes = read_bytes
  
imports: import inspect
  import faiss
  import numpy
  from faiss.loader import DirectMap, IDSelector, IDSelectorArray, IDSelectorBatch, OperatingPoints, RangeSearchResult, rev_swig_ptr, swig_ptr, try_extract_index_ivf
label_desc: Use image node_id 14 for calling a global function with example usage: handle_IOReader(the_class) and returns: bytes