ValueError: all the input array dimensions except for the concatenation axis must match exactly

[Daiiszuki]

I'm trying to download the training data using 0_dl_trainval_data.py. It looks like the data downloaded successfully but the pre-processing causes the error. Specifically price_array = np.hstack([price_array, df[df.tic == tic][['close']].values]) causes the error.

1. What are some potential causes
2. What are some potential solutions?
3. Wouldn't it be better to isolate the data downloading and cleaning?