Error in Starting Interactive Session - Implement error message

[zhanwenchen]

I just downloaded and installed this but wasn't able to start the tutorial. The command g2p-seq2seq --interactive --model_dir model.params gives two possible errors.

1. Traceback (most recent call last):
   File "/Users/zhanwenchen/anaconda/bin/g2p-seq2seq", line 11, in <module>
   load_entry_point('g2p-seq2seq==6.1.3a0', 'console_scripts', 'g2p-seq2seq')()
   File "/Users/zhanwenchen/anaconda/lib/python3.6/site-packages/g2p_seq2seq-6.1.3a0-py3.6.egg/g2p_seq2seq/app.py", line 107, in main
   params.hparams = g2p_trainer_utils.load_params(FLAGS.model_dir)
   File "/Users/zhanwenchen/anaconda/lib/python3.6/site-packages/g2p_seq2seq-6.1.3a0-py3.6.egg/g2p_seq2seq/g2p_trainer_utils.py", line 217, in load_params
   raise StandardError("File {} not exists.".format(params_file_path))
   NameError: name 'StandardError' is not defined

2. Traceback (most recent call last):
   File "/Users/zhanwenchen/anaconda/bin/g2p-seq2seq", line 11, in <module>
   load_entry_point('g2p-seq2seq==6.1.3a0', 'console_scripts', 'g2p-seq2seq')()
   File "/Users/zhanwenchen/anaconda/lib/python3.6/site-packages/g2p_seq2seq-6.1.3a0-py3.6.egg/g2p_seq2seq/app.py", line 107, in main
   params.hparams = g2p_trainer_utils.load_params(FLAGS.model_dir)
   File "/Users/zhanwenchen/anaconda/lib/python3.6/site-packages/g2p_seq2seq-6.1.3a0-py3.6.egg/g2p_seq2seq/g2p_trainer_utils.py", line 210, in load_params
   model_params = json.load(open(params_file_path))
   File "/Users/zhanwenchen/anaconda/lib/python3.6/json/__init__.py", line 299, in load
   parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw)
   File "/Users/zhanwenchen/anaconda/lib/python3.6/json/__init__.py", line 354, in loads
   return _default_decoder.decode(s)
   File "/Users/zhanwenchen/anaconda/lib/python3.6/json/decoder.py", line 339, in decode
   obj, end = self.raw_decode(s, idx=_w(s, 0).end())
   File "/Users/zhanwenchen/anaconda/lib/python3.6/json/decoder.py", line 357, in raw_decode
   raise JSONDecodeError("Expecting value", s, err.value) from None
   json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

[nurtas-m]

Hello, @zhanwenchen Sorry, but the model that we uploaded here is outdated now. Can you, please, train the model by yourself before launching "--interactive" mode? Sorry, but we are not ready to upload the new model now because of some issues.

[nshmyrev]

@nurtas-m Implement exception catch and rethrow with a meaningful error message

[nurtas-m]

Fixed with commit 762de8f57eb74bccaa3a9239f4782ab4de44af84