class_docstr: The original dataset is available at: http://corpus-texmex.irisa.fr/
  (ANN_SIFT1M)
class_docstr_tok: ["The","original","dataset","is","available","at",":","http",":","\/\/corpus-texmex.irisa.fr\/","(","ANN_SIFT1M",")"]
code: def __init__(self):
      Dataset.__init__(self)
      self.d, self.nt, self.nb, self.nq = 128, 100000, 1000000, 10000
      self.basedir = dataset_basedir + "sift1M/"
  
imports: import os
  import numpy
  import faiss
  from .vecs_io import fvecs_read, ivecs_read, bvecs_mmap, fvecs_mmap
  from .exhaustive_search import knn
label_desc: Use image node_id 1 to create a new DatasetSIFT1M object from inherited base classes: Dataset with example: obj = DatasetSIFT1M()