module 'tensorflow' has no attribute 'gfile'

[abebe9849]

When I encountered the error below, I solved the problem by rewriting the tokenizer as follows.

/uth-bert/tokenization_mod.py in load_vocab(vocab_file)
    122     vocab = collections.OrderedDict()
    123     index = 0
--> 124     with tf.gfile.GFile(vocab_file, "r") as reader:
    125         while True:
    126             token = convert_to_unicode(reader.readline())

AttributeError: module 'tensorflow' has no attribute 'gfile'

→→replace tf.gfile.GFile to tf.io.gfile.GFile

If UTH-BERT intends to support tf2 series, I think it is better to modify this part.