'build_target_vecs' not defined

[wesleygoatley]

Hi there, I'm getting an error with 'build_target_vecs' (see below) when running the script - is there something obvious I'm missing?

Traceback (most recent call last):
File "C:\Users\Tobias\AppData\Local\Programs\Python\Python35\lib\threading.py", line 914, in _bootstrap_inner
self.run()
File "C:\Users\Tobias\AppData\Local\Programs\Python\Python35\lib\threading.py", line 862, in run
self._target(*self._args, **self._kwargs)
File "C:\Users\Tobias\AppData\Local\Programs\Python\Python35\lib\site-packages\keras-1.2.2-py3.5.egg\keras\engine\training.py", line 429, in data_generator_task
generator_output = next(self._generator)
File "seq2seq.py", line 149, in generate_batches
y = build_target_vecs()
NameError: name 'build_target_vecs' is not defined

Traceback (most recent call last):
File "seq2seq.py", line 166, in
model.fit_generator(generator=generate_batches(batch_size, one_hot=False), samples_per_epoch=n_examples, nb_epoch=n_epochs, verbose=1)
File "C:\Users\Tobias\AppData\Local\Programs\Python\Python35\lib\site-packages\keras-1.2.2-py3.5.egg\keras\engine\training.py", line 1532, in fit_generator
str(generator_output))
ValueError: output of generator should be a tuple (x, y, sample_weight) or (x, y). Found: None