title: can not split large .txt file into train, test and validation parts for deep text corrector
body: <p>I have a single large .txt file and I want to split it into train, test and validation set. below are the lines of code where I want to use those flies. I am not getting any intuition about how to do it. </p>
  
  <pre><code>python correct_text.py --train_path 
                          /movie_dialog_train.txt \
                         --val_path /movie_dialog_val.txt \
                         --config DefaultMovieDialogConfig \
                         --data_reader_type MovieDialogReader \
                         --model_path /movie_dialog_model
  </code></pre>