def MapFileToArchive(self, file_path):
    num_archives = len(self.zipfilenames)
    while num_archives > 0:
      target = self.zipfilenames[num_archives - 1]
      if len(target) > 1:
        if self.CompareFilenames(target[1], file_path) >= 0:
          return target[0]
      num_archives -= 1

    return None
Given a file name, determine what archive it should be in.
dataset/ETHPy150Open aehlke/manabi/apps/dojango/appengine/memcache_zipserve.py/MemcachedZipHandler.MapFileToArchive