Developer hub: http://www.opendeep.org/

OpenDeep is a deep learning framework for Python built from the ground up in Theano with a focus on flexibility and ease of use for both industry data scientists and cutting-edge researchers. OpenDeep is a modular and easily extensible framework for constructing any neural network architecture to solve your problem.

Use OpenDeep to:

• Quickly prototype complex networks through a focus on complete modularity and containers similar to Torch.
• Configure and train existing state-of-the-art models.
• Write your own models from scratch in Theano and plug into OpenDeep for easy training and dataset integration.
• Use visualization and debugging tools to see exactly what is happening with your neural net architecture.
• Plug into your existing Numpy/Scipy/Pandas/Scikit-learn pipeline.
• Run on the CPU or GPU.

This library is currently undergoing rapid development and is in its alpha stages.

Train and evaluate a Multilayer Perceptron (MLP - your generic feedforward neural network for classification) on the MNIST handwritten digit dataset:

from opendeep.models.container import Prototype
from opendeep.models.single_layer.basic import BasicLayer, SoftmaxLayer
from opendeep.optimization.adadelta import AdaDelta
from opendeep.data.standard_datasets.image.mnist import MNIST, datasets

mlp = Prototype()
mlp.add(BasicLayer(input_size=28*28, output_size=512, activation='rectifier', noise='dropout'))
mlp.add(BasicLayer(output_size=512, activation='rectifier', noise='dropout'))
mlp.add(SoftmaxLayer(output_size=10))

data = MNIST()
trainer = AdaDelta(model=mlp, dataset=data, n_epoch=10)
trainer.train()

test_data, test_labels = data.getSubset(datasets.TEST)
predictions = mlp.run(test_data.eval())

print "Accuracy: ", float(sum(predictions==test_labels.eval())) / len(test_labels.eval())

Because OpenDeep is still in alpha, you have to install via setup.py. Also, please make sure you have these dependencies installed first.

• Theano: Theano and its dependencies are required to use OpenDeep. You need to install the bleeding-edge version directly from their GitHub, which has installation instructions here.
  • For GPU integration with Theano, you also need the latest CUDA drivers. Here are instructions for setting up Theano for the GPU. If you prefer to use a server on Amazon Web Services, here are instructions for setting up an EC2 gpu server with Theano.
  • CuDNN (optional but recommended for CNN's): for a fast convolution support from Nvidia. You will want to move the files to Theano's directory like the instructions say here: Theano cuDNN integration.
• Pillow (PIL): image manipulation functionality.
• PyYAML (optional): used for YAML parsing of config files.
• Bokeh (optional): if you want live charting/plotting of values during training or testing.

1. Navigate to your desired installation directory and download the github repository:

   git clone https://github.com/vitruvianscience/opendeep.git

2. Navigate to the top-level folder (should be named OpenDeep and contain the file setup.py) and run setup.py with develop mode:

   cd opendeep
   python setup.py develop

Using python setup.py develop instead of the normal python setup.py install allows you to update the repository files by pulling from git and have the whole package update! No need to reinstall when you get the latest files.

That's it! Now you should be able to import opendeep into python modules.

To get up to speed on deep learning, check out a blog post here: Deep Learning 101. You can also go through tutorials on OpenDeep's documentation site: http://www.opendeep.org/

Let's say you want to train a Denoising Autoencoder on the MNIST handwritten digit dataset. You can get started in just a few lines of code:

# standard libraries
import logging
# third-party imports
from opendeep.log.logger import config_root_logger
import opendeep.data.dataset as datasets
from opendeep.data.standard_datasets.image.mnist import MNIST
from opendeep.models.single_layer.autoencoder import DenoisingAutoencoder
from opendeep.optimization.adadelta import AdaDelta

# grab the logger to record our progress
log = logging.getLogger(__name__)
# set up the logging to display to std.out and files.
config_root_logger()
log.info("Creating a new Denoising Autoencoder")

# create the MNIST dataset
mnist = MNIST()

# define some model configuration parameters (this could have come from json!)
config = {
    "input_size": 28*28, # dimensions of the MNIST images
    "hidden_size": 1500  # number of hidden units - generally bigger than input size
}
# create the denoising autoencoder
dae = DenoisingAutoencoder(**config)

# create the optimizer to train the denoising autoencoder
# AdaDelta is normally a good generic optimizer
optimizer = AdaDelta(dae, mnist)
optimizer.train()

# test the trained model and save some reconstruction images
n_examples = 100
# grab 100 test examples
test_xs, _ = mnist.getSubset(datasets.TEST)
test_xs = test_xs[:n_examples].eval()
# test and save the images
dae.create_reconstruction_image(test_xs)

Congrats, you just:

• set up a dataset (MNIST)
• instantiated a denoising autoencoder model with some configurations
• trained it with an AdaDelta optimizer
• and predicted some outputs given inputs (and saved them as an image)!

Source code: https://github.com/vitruvianscience/opendeep

Documentation and tutorials: http://www.opendeep.org/

User group: opendeep-users

Developer group: opendeep-dev

Twitter: @opendeep

We would love all help to make this the best library possible! Feel free to fork the repository and join the Google groups!

• Modularity. A lot of recent deep learning progress has come from combining multiple models. Existing libraries are either too confusing or not easily extensible enough to perform novel research and also quickly set up existing algorithms at scale. This need for transparency and modularity is the main motivating factor for creating the OpenDeep library, where we hope novel research and industry use can both be easily implemented.
• Ease of use. Many libraries require a lot of familiarity with deep learning or their specific package structures. OpenDeep's goal is to be the best-documented deep learning library and have smart enough default code that someone without a background can start training models, while experienced practitioners can easily create and customize their own algorithms.
• State of the art. A side effect of modularity and ease of use, OpenDeep aims to maintain state-of-the-art performance as new algorithms and papers get published. As a research library, citing and accrediting those authors and code used is very important to the library.