v0.0.15

pydantic/montyv0.0.15Apr 18, 2026by samuelcolvin

AI Summary

Feature-rich release adding hasattr builtin, cheap sourcemaps, chain assignment support, and async Monty instance building without holding the GIL.

Key Highlights

Implemented hasattr builtin function
Added cheap sourcemaps
Support chain assignment
Support building Monty instance async without holding GIL
Fix partial future resolution panics in mixed gathers

New Features

hasattr builtin function
Cheap sourcemaps
Chain assignment support
Async Monty instance building
MontyRepl methods for calling Python functions from Rust

Full Release Notes

## What's Changed
* fix(vm): fix partial future resolution panics in mixed gathers by @runyaga in https://github.com/pydantic/monty/pull/251
* Implement `hasattr` builtin function by @friendlymatthew in https://github.com/pydantic/monty/pull/66
* add benchmark for parsing 1000 lines by @samuelcolvin in https://github.com/pydantic/monty/pull/353
* Cheap sourcemaps by @samuelcolvin in https://github.com/pydantic/monty/pull/354
* raise `MontySyntaxError` for source with lone surrogates by @samuelcolvin in https://github.com/pydantic/monty/pull/355
* feat: add MontyRepl methods for calling Python functions from Rust by @rsr5 in https://github.com/pydantic/monty/pull/271
* wrap input unicode conversion errors as `MontyRuntimeError` by @samuelcolvin in https://github.com/pydantic/monty/pull/356
* support chain assignment by @samuelcolvin in https://github.com/pydantic/monty/pull/357
* Support building a `Monty` instance async and without holding the GIL by @samuelcolvin in https://github.com/pydantic/monty/pull/358

## New Contributors
* @runyaga made their first contribution in https://github.com/pydantic/monty/pull/251

**Full Changelog**: https://github.com/pydantic/monty/compare/v0.0.14...v0.0.15