code: def release(self):
      memcache.delete(self.name, namespace="whooshlocks")
  
imports: import time
  from google.appengine.api import memcache
  from google.appengine.ext import db
  from whoosh.compat import BytesIO
  from whoosh.index import TOC, FileIndex, _DEF_INDEX_NAME
  from whoosh.filedb.filestore import ReadOnlyError, Storage
  from whoosh.filedb.structfile import StructFile
label_desc: Use image node_id 3 for calling the MemcacheLock obj's underlying member method code with example usage: obj.release() without return types