Ypy

Ypy is a Python binding for Y-CRDT. It provides distributed data types that enable real-time collaboration between devices. Ypy can sync data with any other platform that has a Y-CRDT binding, allowing for seamless cross-domain communication. The library is a thin wrapper around Yrs, taking advantage of the safety and performance of Rust.

🧪 Project is still experimental. Expect the API to change before a version 1.0 stable release.

Installation

pip install y-py

Getting Started

Ypy provides many of the same shared data types as Yjs. All objects are shared within a YDoc and get modified within a transaction block.

import y_py as Y

d1 = Y.YDoc()
# Create a new YText object in the YDoc
text = d1.get_text('test')
# Start a transaction in order to update the text
with d1.begin_transaction() as txn:
    # Add text contents
    text.extend(txn, "hello world!")

# Create another document
d2 = Y.YDoc()
# Share state with the original document
state_vector = Y.encode_state_vector(d2)
diff = Y.encode_state_as_update(d1, state_vector)
Y.apply_update(d2, diff)

value = str(d2.get_text('test'))

assert value == "hello world!"

Development Setup

0. Install Rust and Python
1. Install maturin in order to build Ypy: pip install maturin
2. Create a development build of the library: maturin develop

Tests

All tests are located in /tests. If you are using hatch, there is a test environment matrix defined in pyproject.toml that will run pytest against py37 through py311. To run the tests, install pytest and run the command line tool from the project root:

pip install pytest
pytest

Build Ypy :

Build the library as a wheel and store them in target/wheels:

maturin build