updates for python3

[andr3w321]

Attached are my attempts at an update for compatibility with python3. The date_fetcher.py works fine, but when I run python main.py --stock_symbol=SP500 --train --input_size=1 --lstm_size=128 --max_epoch=50 I get the following error

$ python main.py --stock_symbol=SP500 --train --input_size=1 --lstm_size=128 --max_epoch=50
{'batch_size': 64,
'embed_size': None,
'init_epoch': 5,
'init_learning_rate': 0.001,
'input_size': 1,
'keep_prob': 0.8,
'learning_rate_decay': 0.99,
'lstm_size': 128,
'max_epoch': 50,
'num_layers': 1,
'num_steps': 30,
'sample_size': 4,
'stock_count': 100,
'stock_symbol': 'SP500',
'train': True}
2018-01-05 01:50:59.743127: I tensorflow/core/platform/cpu_feature_guard.cc:137] Your CPU supports instructions that this TensorFlow binary was not compiled to use: SSE4.1 SSE4.2 AVX AVX2 FMA
/home/me/.virtualenvs/venv_stock_analysis/lib/python3.5/site-packages/tensorflow/python/ops/gradients_impl.py:96: UserWarning: Converting sparse IndexedSlices to a dense Tensor of unknown shape. This may consume a large amount of memory.
"Converting sparse IndexedSlices to a dense Tensor of unknown shape. "

Variables: name (type shape) [size]

dynamic_rnn/lstm_cell/kernel:0 (float32_ref 129x512) [66048, bytes: 264192]
dynamic_rnn/lstm_cell/bias:0 (float32_ref 512) [512, bytes: 2048]
w:0 (float32_ref 128x1) [128, bytes: 512]
b:0 (float32_ref 1) [1, bytes: 4]
Total size of variables: 66689
Total bytes of variables: 266756
len(merged_test_X) = 0
len(merged_test_y) = 0
len(merged_test_labels) = 0
{'SP500': array([], dtype=float64)}
Start training for stocks: ['SP500']
Traceback (most recent call last):
File "main.py", line 112, in
tf.app.run()
File "/home/me/.virtualenvs/venv_stock_analysis/lib/python3.5/site-packages/tensorflow/python/platform/app.py", line 48, in run
_sys.exit(main(_sys.argv[:1] + flags_passthrough))
File "main.py", line 105, in main
rnn_model.train(stock_data_list, FLAGS)
File "/home/me/Dropbox/projects/stock-rnn/model_rnn.py", line 239, in train
final_pred, final_loss = self.sess.run([self.pred, self.loss], test_data_feed)
File "/home/me/.virtualenvs/venv_stock_analysis/lib/python3.5/site-packages/tensorflow/python/client/session.py", line 889, in run
run_metadata_ptr)
File "/home/me/.virtualenvs/venv_stock_analysis/lib/python3.5/site-packages/tensorflow/python/client/session.py", line 1096, in _run
% (np_val.shape, subfeed_t.name, str(subfeed_t.get_shape())))
ValueError: Cannot feed value of shape (0,) for Tensor 'inputs:0', which has shape '(?, 30, 1)'