lagom is a 'magic' word in Swedish, inte för mycket och inte för lite, enkelhet är bäst (not too much and not too little, simplicity is often the best). It is the philosophy on which this library was designed.
Why to use lagom ?
lagom balances between the flexibility and the usability when developing reinforcement learning (RL) algorithms. The library is built on top of PyTorch and provides modular tools to quickly prototype RL algorithms. However, it does not go overboard, because too low level is often time consuming and prone to potential bugs, while too high level degrades the flexibility which makes it difficult to try out some crazy ideas fast.
We are continuously making lagom more 'self-contained' to set up and run experiments quickly. It internally supports base classes for multiprocessing (master-worker framework) for parallelization (e.g. experiments and evolution strategies). It also supports hyperparameter search by defining configurations either as grid search or random search.
Table of Contents
Installation
We highly recommand using an Miniconda environment:
conda create -n lagom python=3.7
Install dependencies
pip install -r requirements.txt
We also provide some bash scripts in scripts/ directory to automatically set up the system configurations, conda environment and dependencies.
Install lagom from source
git clone https://github.com/zuoxingdong/lagom.git
cd lagom
pip install -e .
Installing from source allows to flexibly modify and adapt the code as you pleased, this is very convenient for research purpose.
Documentation
The documentation hosted by ReadTheDocs is available online at http://lagom.readthedocs.io
RL Baselines
We implemented a collection of standard reinforcement learning algorithms at baselines using lagom.
How to use lagom
A common pipeline to use lagom can be done as following:
- Define your RL agent
- Define your environment
- Define your engine for training and evaluating the agent in the environment.
- Define your Configurations for hyperparameter search
- Define
run(config, seed, device)for your experiment pipeline - Call
run_experiment(run, config, seeds, num_worker)to parallelize your experiments
A graphical illustration is coming soon.
Examples
We provide a few simple examples.
Test
We are using pytest for tests. Feel free to run via
pytest test -v
What's new
-
2019-03-04 (v0.0.3)
- Much easier and cleaner APIs
-
2018-11-04 (v0.0.2)
- More high-level API designs
- More unit tests
-
2018-09-20 (v0.0.1)
- Initial release
Reference
This repo is inspired by OpenAI Gym, OpenAI baselines, OpenAI Spinning Up
Please use this bibtex if you want to cite this repository in your publications:
@misc{lagom,
author = {Zuo, Xingdong},
title = {lagom: A PyTorch infrastructure for rapid prototyping of reinforcement learning algorithms},
year = {2018},
publisher = {GitHub},
journal = {GitHub repository},
howpublished = {\url{https://github.com/zuoxingdong/lagom}},
}