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From Play to Policy: Conditional Behavior Generation from Uncurated Robot Data

[Paper] [Project Website] [Data]

Zichen Jeff Cui, Yibin Wang, Nur Muhammad (Mahi) Shafiullah, and Lerrel Pinto, New York University

This repo contains code for reproducing sim environment experiments, and the real-world robotic experiment gym environment, and data collection tools. Datasets for the simulated environments will be uploaded to this OSF link.

Getting started

The following assumes our current working directory is the root folder of this project repository; tested on Ubuntu 20.04 LTS (amd64).

Setting up the project environments

• Install the project environment:

  conda env create --file=conda_env.yml
  

• Activate the environment:

  conda activate cbet
  

• Clone the Relay Policy Learning repo:

  git clone https://github.com/google-research/relay-policy-learning
  

• Install MuJoCo 2.1.0: https://github.com/openai/mujoco-py#install-mujoco
• Install CARLA server 0.9.13: https://carla.readthedocs.io/en/0.9.13/start_quickstart/#a-debian-carla-installation
• To enable logging, log in with a wandb account:

  wandb login
  

  Alternatively, to disable logging altogether, set the environment variable WANDB_MODE:

  export WANDB_MODE=disabled
  

Getting the training datasets

Datasets used for training will be uploaded to this OSF link.

• Download and unzip the datasets.
• In ./config/env_vars/env_vars.yaml, set the dataset paths to the unzipped directories.
  • carla_multipath_town04_merge: CARLA environment
  • relay_kitchen: Franka kitchen environment
  • multimodal_push_fixed_target: Block push environment

Reproducing experiments

The following assumes our current working directory is the root folder of this project repository.

To reproduce the experiment results, the overall steps are:

1. Activate the conda environment with

   conda activate cbet
   

2. Train with python3 train.py. A model snapshot will be saved to ./exp_local/...;
3. In the corresponding environment config, set the load_dir to the absolute path of the snapshot directory above;
4. Eval with python3 run_on_env.py.

See below for detailed steps for each environment.

CARLA

• Train:

  python3 train.py --config-name=train_carla_future_cond
  

  Snapshots will be saved to a new timestamped directory ./exp_local/{date}/{time}_carla_train
• In configs/env/carla_multipath_merge_town04_traj_rep.yaml, set load_dir to the absolute path of the directory above.
• Evaluation:

  python3 run_on_env.py --config-name=eval_carla_future_cond
  

Franka kitchen

• Train:

  python3 train.py --config-name=train_kitchen_future_cond
  

  Snapshots will be saved to a new timestamped directory ./exp_local/{date}/{time}_kitchen_train
• In configs/env/relay_kitchen_traj.yaml, set load_dir to the absolute path of the directory above.
• Evaluation:

  export PYTHONPATH=$PYTHONPATH:$(pwd)/relay-policy-learning/adept_envs
  python3 run_on_env.py --config-name=eval_kitchen_future_cond
  

  (Evaluation requires including the relay policy learning repo in PYTHONPATH.)

Block push

• Train:

  python3 train.py --config-name=train_blockpush_future_cond
  

  Snapshots will be saved to a new timestamped directory ./exp_local/{date}/{time}_blockpush_train
• In configs/env/block_pushing_multimodal_fixed_target.yaml, set load_dir to the absolute path of the directory above.
• Evaluation:

  ASSET_PATH=$(pwd) python3 run_on_env.py --config-name=eval_blockpush_future_cond
  

  (Evaluation requires including this repository in ASSET_PATH.)

Speeding up evaluation

• Rendering can be disabled for the kitchen and block pushing environments: set enable_render: False in configs/eval_kitchen_future_cond.yaml, configs/eval_blockpush_future_cond.yaml.

  (This option does not affect CARLA, as it requires rendering for RGB camera observations.)

• CARLA (Unreal Engine 4) renders on GPU 0 by default. If multiple GPUs are available, running the evaluated model on other GPUs can speed up evaluation: e.g. set device: cuda:1 in configs/eval_carla_future_cond.yaml.