code: def seek(self, where, whence=0):
      if whence == 0:  # Absolute
          pos = where
      elif whence == 1:  # Relative
          pos = self._pos + where
      elif whence == 2:  # From end
          pos = self._length - where
      else:
          raise ValueError
  
      self._pos = pos
  
imports: import errno
  import os
  import sys
  from threading import Lock
  from shutil import copyfileobj
  from whoosh.compat import BytesIO, memoryview_
  from whoosh.filedb.structfile import BufferFile, StructFile
  from whoosh.filedb.filestore import FileStorage, StorageError
  from whoosh.system import emptybytes
  from whoosh.util import random_name
label_desc: Use image node_id 6 for calling the SubFile obj's underlying member method code with example usage: obj.seek(where, whence) without return types