message: Only export tokenizer_from_json if keras has it.
  The symbol is exported for versions of keras_applications at least as new as 1.1.0.
  This try-use-except pattern is required for backwards compatibility with users with an old keras_applications.
diff: @@ -27,12 +27,17 @@ text_to_word_sequence = text.text_to_word_sequence
  one_hot = text.one_hot
  hashing_trick = text.hashing_trick
  Tokenizer = text.Tokenizer
  -tokenizer_from_json = text.tokenizer_from_json
  keras_export(
  'keras.preprocessing.text.text_to_word_sequence')(text_to_word_sequence)
  keras_export('keras.preprocessing.text.one_hot')(one_hot)
  keras_export('keras.preprocessing.text.hashing_trick')(hashing_trick)
  keras_export('keras.preprocessing.text.Tokenizer')(Tokenizer)
  +
  +# text.tokenizer_from_json is only available if keras_preprocessing >= 1.1.0
  +try:
  + tokenizer_from_json = text.tokenizer_from_json
  keras_export('keras.preprocessing.text.tokenizer_from_json')(
  tokenizer_from_json)
  +except AttributeError:
  + pass
  