class_docstr: Caches data for the TFT.
class_docstr_tok: ["Caches","data","for","the","TFT","."]
docstr: Returns boolean indicating whether key is present in cache.
docstr_tok: ["Returns","boolean","indicating","whether","key","is","present","in","cache","."]
code: def contains(cls, key):
      """Returns boolean indicating whether key is present in cache."""
  
      return key in cls._data_cache
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import gc
  import json
  import os
  import shutil
  import data_formatters.base
  import libs.utils
  import numpy
  import pandas
  import tensorflow
label_desc: Use image node_id 3 for calling the TFTDataCache obj's underlying member method code with example usage: obj.contains(cls, key) and returns: unknown