Sponsored in part by DARPA as part of the SIMPLEX program under contract number N66001-15-C-4043.
- The Snorkel webpage
- Installation instructions below
- Get started with the tutorials below
- Documentation here
Snorkel is intended to be a lightweight but powerful framework for developing structured information extraction applications for domains in which large labeled training sets are not available or easy to obtain, using the data programming paradigm.
In the data programming approach to developing a machine learning system, the developer focuses on writing a set of labeling functions, which create a large but noisy training set. Snorkel then learns a generative model of this noise—learning, essentially, which labeling functions are more accurate than others—and uses this to train a discriminative classifier.
At a high level, the idea is that developers can focus on writing labeling functions—which are just (Python) functions that provide a label for some subset of data points—and not think about algorithms or features!
Snorkel is very much a work in progress, but some people have already begun developing applications with it, and initial feedback has been positive... let us know what you think, and how we can improve it, in the Issues section!
- Data Programming, to appear at NIPS 2016: https://arxiv.org/abs/1605.07723
- Workshop paper from HILDA 2016 (note Snorkel was previously DDLite): here
Snorkel uses Python 2.7 and requires a few python packages which can be installed using pip:
pip install --requirement python-package-requirement.txtNote that sudo can be prepended to install dependencies system wide if this is an option and the above does not work.
Finally, enable ipywidgets:
jupyter nbextension enable --py widgetsnbextension --sys-prefixBy default (e.g. in the tutorials, etc.) we also use Stanford CoreNLP for pre-processing text; you will be prompted to install this when you run run.sh.
Alternatively, virtualenv can be used by starting with:
virtualenv -p python2.7 .virtualenv
source .virtualenv/bin/activateAfter installing (see below), just run:
./run.sh
There are currently two tutorials for Snorkel, an introductory tutorial and a more advanced disease tagging tutorial. The tutorials are available in the following directories:
tutorials/intro
tutorials/disease_tagger
We like issues as a place to put bugs, questions, feature requests, etc- don't be shy! If submitting an issue about a bug, however, please provide a pointer to a notebook (and relevant data) to reproduce it.
Note: if you have an issue with the matplotlib install related to the module freetype, see this post; if you have an issue installing ipython, try upgrading setuptools
Snorkel is built specifically with usage in Jupyter/IPython notebooks in mind; an incomplete set of best practices for the notebooks:
It's usually most convenient to write most code in an external .py file, and load as a module that's automatically reloaded; use:
%load_ext autoreload
%autoreload 2A more convenient option is to add these lines to your IPython config file, in ~/.ipython/profile_default/ipython_config.py:
c.InteractiveShellApp.extensions = ['autoreload']
c.InteractiveShellApp.exec_lines = ['%autoreload 2']
