(click image for video demonstration)

DeepMoji is a model trained on 1.2 billion tweets with emojis to understand how language is used to express emotions. Through transfer learning the model can obtain state-of-the-art performance on many emotion-related text modeling tasks.

Try our online demo at http://deepmoji.mit.edu! See the paper, blog post or FAQ for more details.

• deepmoji/ contains all the underlying code needed to convert a dataset to our vocabulary and use our model.
• examples/ contains short code snippets showing how to convert a dataset to our vocabulary, load up the model and run it on that dataset.
• scripts/ contains code for processing and analysing datasets to reproduce results in the paper.
• model/ contains the pretrained model and vocabulary.
• data/ contains raw and processed datasets that we include in this repository for testing.
• tests/ contains unit tests for the codebase.

To start out with, have a look inside the examples/ directory. See score_texts_emojis.py for how to use DeepMoji to extract emoji predictions, encode_texts.py for how to convert text into 2304-dimensional emotional feature vectors or finetune_youtube_last.py for how to use the model for transfer learning on a new dataset.

Please consider citing our paper if you use our model or code (see below for citation).

This code is based on Keras, which requires either Theano or Tensorflow as the backend. If you would rather use pyTorch there's an implementation available here, which has kindly been provided by Thomas Wolf.

We assume that you're using Python 2.7 with pip installed. As a backend you need to install either Theano (version 0.9+) or Tensorflow (version 1.3+). Once that's done you need to run the following inside the root directory to install the remaining dependencies:

pip install -e .

This will install the following dependencies:

• Keras (the library was tested on version 2.0.5 but anything above 2.0.0 should work)
• scikit-learn
• h5py
• text-unidecode
• emoji

Ensure that Keras uses your chosen backend. You can find the instructions here, under the Switching from one backend to another section.

Run the included script, which downloads the pretrained DeepMoji weights (~85MB) from here and places them in the model/ directory:

python scripts/download_weights.py

To run the tests, install nose. After installing, navigate to the tests/ directory and run:

nosetests -v

By default, this will also run finetuning tests. These tests train the model for one epoch and then check the resulting accuracy, which may take several minutes to finish. If you'd prefer to exclude those, run the following instead:

nosetests -v -a '!slow'

This code has been tested to work with Python 2.7 on an Ubuntu 16.04 machine. It has not been optimized for efficiency, but should be fast enough for most purposes. We do not give any guarantees that there are no bugs - use the code on your own responsibility!

We welcome pull requests if you feel like something could be improved. You can also greatly help us by telling us how you felt when writing your most recent tweets. Just click here to contribute.

This code and the pretrained model is licensed under the MIT license.

The benchmark datasets are uploaded to this repository for convenience purposes only. They were not released by us and we do not claim any rights on them. Use the datasets at your responsibility and make sure you fulfill the licenses that they were released with. If you use any of the benchmark datasets please consider citing the original authors.

@inproceedings{felbo2017,
  title={Using millions of emoji occurrences to learn any-domain representations for detecting sentiment, emotion and sarcasm},
  author={Felbo, Bjarke and Mislove, Alan and S{\o}gaard, Anders and Rahwan, Iyad and Lehmann, Sune},
  booktitle={Conference on Empirical Methods in Natural Language Processing (EMNLP)},
  year={2017}
}