class_docstr: A subclass of the Unpickler to unpickle our numpy pickles.
class_docstr_tok: ["A","subclass","of","the","Unpickler","to","unpickle","our","numpy","pickles","."]
code: def _open_pickle(self, file_handle):
      return BytesIO(read_zfile(file_handle))
  
imports: import pickle
  import os
  import zlib
  import inspect
  from io import BytesIO
  from .numpy_pickle_utils import _ZFILE_PREFIX
  from .numpy_pickle_utils import Unpickler
  from .numpy_pickle_utils import _ensure_native_byte_order
label_desc: Use image node_id 2 for calling the ZipNumpyUnpickler obj's underlying member method code with example usage: obj._open_pickle(file_handle) and returns: BytesIO