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* Remove document classification datasets

* Remove ReutersEvaluator

* Remove ReutersTrainer

* Remove document classification models

* Remove document classification from

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This is the common repo for deep learning models implemented in PyTorch by the Data Systems Group at the University of Waterloo.


Predictions Over One Input Text Sequence

Moved to

Predictions Over Two Input Text Sequences

For paraphrase detection, question answering, etc.

Each model directory has a with further details.

Setting up PyTorch

If you are an internal Castor contributor using GPU machines in the lab, follow the instructions here.

Castor is designed for Python 3.6 and PyTorch 0.4. PyTorch recommends Anaconda for managing your environment. We'd recommend creating a custom environment as follows:

$ conda create --name castor python=3.6
$ source activate castor

And installing the packages as follows:

$ conda install pytorch torchvision -c pytorch

Other Python packages we use can be installed via pip:

$ pip install -r requirements.txt

Code depends on data from NLTK (e.g., stopwords) so you'll have to download them. Run the Python interpreter and type the commands:

>>> import nltk

Finally, run the following inside the utils directory to build the trec_eval tool for evaluating certain datasets.

$ ./

Data and Pre-Trained Models

If you are an internal Castor contributor using GPU machines in the lab, follow the instructions here.

To fully take advantage of code here, clone these other two repos:

Organize your directory structure as follows:

├── Castor
├── Castor-data
└── Castor-models

For example (using HTTPS):

$ git clone
$ git clone
$ git clone

After cloning the Castor-data repo, you need to unzip embeddings and run data pre-processing scripts. You can choose to follow instructions under each dataset and embedding directory separately, or just run the following script in Castor-data to do all of the steps for you:

$ ./


PyTorch deep learning models for text processing





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