Continuum

A library for PyTorch's loading of datasets in the field of Continual Learning

Aka Continual Learning, Lifelong-Learning, Incremental Learning, etc.

Example:

Install from and PyPi:

pip3 install continuum

And run!

from torch.utils.data import DataLoader

from continuum import ClassIncremental
from continuum.datasets import MNIST
from continuum.tasks import split_train_val


scenario = ClassIncremental(
    MNIST("my/data/path", download=True, train=True),
    increment=1,
    initial_increment=5
)

print(f"Number of classes: {scenario.nb_classes}.")
print(f"Number of tasks: {scenario.nb_tasks}.")

for task_id, train_taskset in enumerate(scenario):
    train_taskset, val_taskset = split_train_val(train_taskset, val_split=0.1)
    train_loader = DataLoader(train_taskset, batch_size=32, shuffle=True)
    val_loader = DataLoader(val_taskset, batch_size=32, shuffle=True)

    for x, y, t in train_loader:
        # Do your cool stuff here

Supported Types of Scenarios

Name	Acronym	Supported	Scenario
New Instances	NI	✅	Instances Incremental
New Classes	NC	✅	Classes Incremental
New Instances & Classes	NIC	✅	Data Incremental

Supported Datasets:

Most dataset from torchvision.dasasets are supported, for the complete list, look at the documentation page on datasets here.

Furthermore some "Meta"-datasets are can be create or used from numpy array or any torchvision.datasets or from a folder for datasets having a tree-like structure or by combining several dataset and creating dataset fellowships!

Indexing

All our continual loader are iterable (i.e. you can for loop on them), and are also indexable.

Meaning that clloader[2] returns the third task (index starts at 0). Likewise, if you want to evaluate after each task, on all seen tasks do clloader_test[:n].

Example of Sample Images from a Continuum scenario

CIFAR10:


Task 0	Task 1	Task 2	Task 3	Task 4

MNIST Fellowship (MNIST + FashionMNIST + KMNIST):


Task 0	Task 1	Task 2

PermutedMNIST:


Task 0	Task 1	Task 2	Task 3	Task 4

RotatedMNIST:


Task 0	Task 1	Task 2	Task 3	Task 4

Citation

If you find this library useful in your work, please consider citing it:

@misc{douillardlesort2020continuum,
  author={Douillard, Arthur and Lesort, Timothée},
  title={Continuum, Data Loaders for Continual Learning},
  publisher={Github},
  journal={Github repository},
  howpublished={\url{https://github.com/Continvvm/continuum}},
  year={2020}
}

Maintainers

This project was started by a joint effort from Arthur Douillard & Timothée Lesort.

Feel free to contribute! If you want to propose new features, please create an issue.

On PyPi

Our project is available on PyPi!

pip3 install continuum

Note that previously another project, a CI tool, was using that name. It is now there continuum_ci.

BM2304/continuum