KD_Lib

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A PyTorch library to easily facilitate knowledge distillation for custom deep learning models

Installation :

============== Stable release

KD_Lib is compatible with Python 3.6 or later and also depends on pytorch. The easiest way to install KD_Lib is with pip, Python's preferred package installer.

.. code-block:: console

$ pip install KD-Lib

Note that KD_Lib is an active project and routinely publishes new releases. In order to upgrade KD_Lib to the latest version, use pip as follows.

.. code-block:: console

$ pip install -U KD-Lib

================= Build from source

If you intend to install the latest unreleased version of the library (i.e from source), you can simply do:

.. code-block:: console

$ git clone https://github.com/SforAiDl/KD_Lib.git
$ cd KD_Lib
$ python setup.py install

Usage

To implement the most basic version of knowledge distillation from Distilling the Knowledge in a Neural Network <https://arxiv.org/abs/1503.02531>_ and plot losses

.. code-block:: python

import torch
import torch.optim as optim
from torchvision import datasets, transforms
from KD_Lib import VanillaKD

# This part is where you define your datasets, dataloaders, models and optimizers

train_loader = torch.utils.data.DataLoader(
    datasets.MNIST(
        "mnist_data",
        train=True,
        download=True,
        transform=transforms.Compose(
            [transforms.ToTensor(), transforms.Normalize((0.1307,), (0.3081,))]
        ),
    ),
    batch_size=32,
    shuffle=True,
)

test_loader = torch.utils.data.DataLoader(
    datasets.MNIST(
        "mnist_data",
        train=False,
        transform=transforms.Compose(
            [transforms.ToTensor(), transforms.Normalize((0.1307,), (0.3081,))]
        ),
    ),
    batch_size=32,
    shuffle=True,
)

teacher_model = <your model>
student_model = <your model>

teacher_optimizer = optim.SGD(teacher_model.parameters(), 0.01)
student_optimizer = optim.SGD(student_model.parameters(), 0.01)

# Now, this is where KD_Lib comes into the picture

distiller = VanillaKD(teacher_model, student_model, train_loader, test_loader, 
                      teacher_optimizer, student_optimizer)  
distiller.train_teacher(epochs=5, plot_losses=True, save_model=True)    # Train the teacher network
distiller.train_student(epochs=5, plot_losses=True, save_model=True)    # Train the student network
distiller.evaluate(teacher=False)                                       # Evaluate the student network
distiller.get_parameters()                                              # A utility function to get the number of parameters in the teacher and the student network 

To train a collection of 3 models in an online fashion using the framework in Deep Mutual Learning <https://arxiv.org/abs/1706.00384>_ and log training details to Tensorboard

.. code-block:: python

import torch
import torch.optim as optim
from torchvision import datasets, transforms
from KD_Lib import DML
from KD_Lib import ResNet18, ResNet50                                   # To use models packaged in KD_Lib

# This part is where you define your datasets, dataloaders, models and optimizers

train_loader = torch.utils.data.DataLoader(
    datasets.MNIST(
        "mnist_data",
        train=True,
        download=True,
        transform=transforms.Compose(
            [transforms.ToTensor(), transforms.Normalize((0.1307,), (0.3081,))]
        ),
    ),
    batch_size=32,
    shuffle=True,
)

test_loader = torch.utils.data.DataLoader(
    datasets.MNIST(
        "mnist_data",
        train=False,
        transform=transforms.Compose(
            [transforms.ToTensor(), transforms.Normalize((0.1307,), (0.3081,))]
        ),
    ),
    batch_size=32,
    shuffle=True,
)

student_params = [4, 4, 4, 4, 4]
student_model_1 = ResNet50(student_params, 1, 10)
student_model_2 = ResNet18(student_params, 1, 10)

student_cohort = [student_model_1, student_model_2]

student_optimizer_1 = optim.SGD(student_model_1.parameters(), 0.01)
student_optimizer_2 = optim.SGD(student_model_2.parameters(), 0.01)

student_optimizers = [student_optimizer_1, student_optimizer_2]

# Now, this is where KD_Lib comes into the picture 

distiller = DML(student_cohort, train_loader, test_loader, student_optimizers)

distiller.train_students(epochs=5, log=True, logdir="./Logs")
distiller.evaluate()
distiller.get_parameters()

Currently implemented works

Some benchmark results can be found in the logs <./logs.rst>_ file.

+-----------------------------------------------------------+----------------------------------+----------------------+ | Paper | Link | Repository (KD_Lib/) | +===========================================================+==================================+======================+ | Distilling the Knowledge in a Neural Network | https://arxiv.org/abs/1503.02531 | KD/vision/vanilla | +-----------------------------------------------------------+----------------------------------+----------------------+ | Improved Knowledge Distillation via Teacher Assistant | https://arxiv.org/abs/1902.03393 | KD/vision/TAKD | +-----------------------------------------------------------+----------------------------------+----------------------+ | Relational Knowledge Distillation | https://arxiv.org/abs/1904.05068 | KD/vision/RKD | +-----------------------------------------------------------+----------------------------------+----------------------+ | Distilling Knowledge from Noisy Teachers | https://arxiv.org/abs/1610.09650 | KD/vision/noisy | +-----------------------------------------------------------+----------------------------------+----------------------+ | Paying More Attention To The Attention | https://arxiv.org/abs/1612.03928 | KD/vision/attention | +-----------------------------------------------------------+----------------------------------+----------------------+ | Revisit Knowledge Distillation: a Teacher-free Framework | https://arxiv.org/abs/1909.11723 |KD/vision/teacher_free| +-----------------------------------------------------------+----------------------------------+----------------------+ | Mean Teachers are Better Role Models | https://arxiv.org/abs/1703.01780 |KD/vision/mean_teacher| +-----------------------------------------------------------+----------------------------------+----------------------+ | Knowledge Distillation via Route Constrained Optimization | https://arxiv.org/abs/1904.09149 | KD/vision/RCO | +-----------------------------------------------------------+----------------------------------+----------------------+ | Born Again Neural Networks | https://arxiv.org/abs/1805.04770 | KD/vision/BANN | +-----------------------------------------------------------+----------------------------------+----------------------+ | Preparing Lessons: Improve Knowledge Distillation with | https://arxiv.org/abs/1911.07471 | KD/vision/KA | | Better Supervision | | | +-----------------------------------------------------------+----------------------------------+----------------------+ | Improving Generalization Robustness with Noisy | https://arxiv.org/abs/1910.05057 | KD/vision/noisy | | Collaboration in Knowledge Distillation | | | +-----------------------------------------------------------+----------------------------------+----------------------+ | Distilling Task-Specific Knowledge from BERT into | https://arxiv.org/abs/1903.12136 | KD/text/BERT2LSTM | | Simple Neural Networks | | | +-----------------------------------------------------------+----------------------------------+----------------------+ | Deep Mutual Learning | https://arxiv.org/abs/1706.00384 | KD/vision/DML | +-----------------------------------------------------------+----------------------------------+----------------------+ | The Lottery Ticket Hypothesis: Finding | https://arxiv.org/abs/1803.03635 | Pruning/ | | Sparse, Trainable Neural Networks | | lottery_tickets | +-----------------------------------------------------------+----------------------------------+----------------------+ | Regularizing Class-wise Predictions via Self- | https://arxiv.org/abs/2003.13964 | KD/vision/CSDK | | knowledge Distillation. | | | +-----------------------------------------------------------+----------------------------------+----------------------+

Please cite our pre-print if you find KD_Lib useful in any way :)

.. code-block:: console

@misc{shah2020kdlib,
  title={KD-Lib: A PyTorch library for Knowledge Distillation, Pruning and Quantization}, 
  author={Het Shah and Avishree Khare and Neelay Shah and Khizir Siddiqui},
  year={2020},
  eprint={2011.14691},
  archivePrefix={arXiv},
  primaryClass={cs.LG}
}