code: def fromFile(self, file):
      sstruct.unpack(self.format, file.read(self.formatSize), self)
  
imports: from io import BytesIO
  from types import SimpleNamespace
  from fontTools.misc.textTools import Tag
  from fontTools.misc import sstruct
  from fontTools.ttLib import TTLibError, TTLibFileIsCollectionError
  import struct
  from collections import OrderedDict
  import logging
label_desc: Use image node_id 2 for calling the DirectoryEntry obj's underlying member method code with example usage: obj.fromFile(file) without return types