bonsai-bt

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Python bindings for the bonsai-bt behavior-tree library.

Install

pip install bonsai-bt

The package is published on PyPI as bonsai-bt and imported as bonsai_bt:

import bonsai_bt as bt

Installation (dev)

For building from source — needed if you're contributing to the Rust core or developing against an unpublished version:

python -m venv .venv
source .venv/bin/activate   # Windows: .venv\Scripts\Activate.ps1
pip install maturin
cd bonsai-py
maturin develop
python -c "import bonsai_bt; print(bonsai_bt.__version__)"

Same BT in Rust and Python

A minimal three-node tree (Hello → Wait(1.0) → Goodbye) implemented in both languages. Semantics are identical because the Python package is a thin wrapper around the Rust crate; only the API surface differs (Rust requires an enum + explicit types; Python uses any hashable object as the action payload).

Rust

use bonsai_bt::{Behavior, Event, Status, UpdateArgs, BT};

#[derive(Clone, Debug)]
enum Greet { Hello, Goodbye }

fn main() {
    let tree = Behavior::Sequence(vec![
        Behavior::Action(Greet::Hello),
        Behavior::Wait(1.0),
        Behavior::Action(Greet::Goodbye),
    ]);

    let mut bt: BT<Greet, ()> = BT::new(tree, ());

    for _ in 0..5 {
        let e: Event = UpdateArgs { dt: 0.5 }.into();
        bt.tick(&e, &mut |args, _bb| {
            match *args.action {
                Greet::Hello   => println!("hello"),
                Greet::Goodbye => println!("goodbye"),
            }
            (Status::Success, args.dt)
        });
    }
}

Python

import bonsai_bt as bt

tree = bt.Sequence([
    bt.Action("hello"),
    bt.Wait(1.0),
    bt.Action("goodbye"),
])

tree_bt = bt.BT(tree, None)

def cb(args, _bb):
    print(args.action)
    return (bt.Status.Success, args.dt)

for _ in range(5):
    tree_bt.tick(0.5, cb)

Output (both):

hello
goodbye

For richer examples — multi-job orchestration, visualizer integration, parallel agents — see examples/.

License

MIT - see LICENSE.

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This release

0.13.0

Jun 21, 2026

0.12.1

Jun 7, 2026

0.12.0

Jun 4, 2026

bonsai-bt 0.13.0

Install

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Same BT in Rust and Python

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