release: 0.29.1

Author: davidhewitt

CHANGELOG.md

@@ -10,6 +10,33 @@ To see unreleased changes, please see the [CHANGELOG on the main branch guide](h
 
 <!-- towncrier release notes start -->
 
+## [0.29.1] - 2026-08-02
+
+### Changed
+
+- Use the inline definition of `Py_TYPE` in the unlimited API on 3.14+ [#6179](https://github.com/PyO3/pyo3/pull/6179)
+
+### Fixed
+
+- Fix incorrect pointer arithmetic in FFI definitions `PyObject_GET_WEAKREFS_LISTPTR` and `PyHeapType_GET_MEMBERS`. [#6145](https://github.com/PyO3/pyo3/pull/6145)
+- Fix compilation error with `nightly` feature on PyPy and GraalPy due to `!Ungil` implementations for FFI types not available on those platforms. [#6146](https://github.com/PyO3/pyo3/pull/6146)
+- Fix `append_to_inittab` and `PyInit_<module>` internal module definition corruption on 32-bit and big-endian platforms on Python 3.15+. [#6150](https://github.com/PyO3/pyo3/pull/6150)
+- Fix return value of `PyClassGuardMutSuper::as_super` being scoped to the full guard lifetime, now the `&mut` borrow of the `as_super()` call. [#6181](https://github.com/PyO3/pyo3/pull/6181)
+- Fix builds for free-threaded interpreters older than 3.15 erroring with "cannot set a minimum Python version" when an `abi3t-py3*` feature is enabled and the configuration comes from `PYO3_CONFIG_FILE`, sysconfigdata or cross-compilation defaults. [#6192](https://github.com/PyO3/pyo3/pull/6192)
+- Fix a memory leak when deallocating `#[pyclass(dict)]` instances with a populated `__dict__`. [#6198](https://github.com/PyO3/pyo3/pull/6198)
+- Fix an abort inside a `#[pyclass]`'s GC traversal when the traversal is stopped early. [#6206](https://github.com/PyO3/pyo3/pull/6206)
+- Fix reference cycles through the `__dict__` of a `#[pyclass(dict)]` never being collected. [#6206](https://github.com/PyO3/pyo3/pull/6206)
+- Fix building on GraalPy 3.13. [#6208](https://github.com/PyO3/pyo3/pull/6208)
+- Fix reference count leak of references to `#[pyclass]` type objects held by their instances on instance deallocation. [#6224](https://github.com/PyO3/pyo3/pull/6224)
+- Fix FFI definitions `PyByteArray_GET_SIZE`, `PyList_GET_SIZE`, and `PySet_GET_SIZE` to use an atomic load for free-threaded Python. [#6230](https://github.com/PyO3/pyo3/pull/6230)
+- Fix a memory leak on Python 3.11 and 3.12 where creating an instance of a `#[pyclass(dict)]` class leaked one empty dict per instance. [#6234](https://github.com/PyO3/pyo3/pull/6234)
+- Fix `experimental-inspect` type stubs to emit the arguments of many magic methods as positional-only to match runtime behavior, rather than positional-or-keyword. [#6239](https://github.com/PyO3/pyo3/pull/6239)
+- Fix `experimental-inspect` type stubs to emit the Python name rather than the Rust name for `#[pyfunction(name = "...")]`. [#6254](https://github.com/PyO3/pyo3/pull/6254)
+- Fix `experimental-inspect` generating invalid internal JSON when `#[pymodule]` members are gated by `#[cfg]`. [#6255](https://github.com/PyO3/pyo3/pull/6255)
+- Fix `__inplace_concat__` and `__inplace_repeat__` overriding `__concat__` and `__repeat__` when both were defined. [#6260](https://github.com/PyO3/pyo3/pull/6260)
+- Fix conversion of out-of-range `time::Duration` values to return `OverflowError` instead of panicking. [#6266](https://github.com/PyO3/pyo3/pull/6266)
+- Fix `experimental-inspect` type stubs padding blank lines inside indented docstrings. [#6270](https://github.com/PyO3/pyo3/pull/6270)
+
 ## [0.29.0] - 2026-06-11
 
 ### Packaging
@@ -2655,7 +2682,9 @@ Yanked
 
 - Initial release
 
-[Unreleased]: https://github.com/pyo3/pyo3/compare/v0.28.3...HEAD
+[Unreleased]: https://github.com/pyo3/pyo3/compare/v0.29.1...HEAD
+[0.29.1]: https://github.com/pyo3/pyo3/compare/v0.29.0...v0.29.1
+[0.29.0]: https://github.com/pyo3/pyo3/compare/v0.28.3...v0.29.0
 [0.28.3]: https://github.com/pyo3/pyo3/compare/v0.28.2...v0.28.3
 [0.28.2]: https://github.com/pyo3/pyo3/compare/v0.28.1...v0.28.2
 [0.28.1]: https://github.com/pyo3/pyo3/compare/v0.28.0...v0.28.1

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "pyo3"
-version = "0.29.0"
+version = "0.29.1"
 description = "Bindings to Python interpreter"
 authors = ["PyO3 Project and Contributors <https://github.com/PyO3>"]
 readme = "README.md"
@@ -36,10 +36,10 @@ libc = "0.2.62"
 once_cell = "1.21"
 
 # ffi bindings to the python interpreter, split into a separate crate so they can be used independently
-pyo3-ffi = { path = "pyo3-ffi", version = "=0.29.0" }
+pyo3-ffi = { path = "pyo3-ffi", version = "=0.29.1" }
 
 # support crate for macros feature
-pyo3-macros = { path = "pyo3-macros", version = "=0.29.0", optional = true }
+pyo3-macros = { path = "pyo3-macros", version = "=0.29.1", optional = true }
 
 # support crate for multiple-pymethods feature
 inventory = { version = "0.3.5", optional = true }
@@ -94,7 +94,7 @@ regex = "1.12.3"
 ctrlc = "3.5.2"
 
 [build-dependencies]
-pyo3-build-config = { path = "pyo3-build-config", version = "=0.29.0" }
+pyo3-build-config = { path = "pyo3-build-config", version = "=0.29.1" }
 
 [features]
 default = ["macros"]

README.md

@@ -71,7 +71,7 @@ name = "string_sum"
 crate-type = ["cdylib"]
 
 [dependencies]
-pyo3 = "0.29.0"
+pyo3 = "0.29.1"
 ```
 
 **`src/lib.rs`**
@@ -139,7 +139,7 @@ Start a new project with `cargo new` and add  `pyo3` to the `Cargo.toml` like th
 
 ```toml
 [dependencies.pyo3]
-version = "0.29.0"
+version = "0.29.1"
 # Enabling this cargo feature will cause PyO3 to start a Python interpreter on first call to `Python::attach`
 features = ["auto-initialize"]
 ```

examples/decorator/.template/pre-script.rhai

@@ -1,4 +1,4 @@
-variable::set("PYO3_VERSION", "0.29.0");
+variable::set("PYO3_VERSION", "0.29.1");
 file::rename(".template/Cargo.toml", "Cargo.toml");
 file::rename(".template/pyproject.toml", "pyproject.toml");
 file::delete(".template");

examples/maturin-starter/.template/pre-script.rhai

@@ -1,4 +1,4 @@
-variable::set("PYO3_VERSION", "0.29.0");
+variable::set("PYO3_VERSION", "0.29.1");
 file::rename(".template/Cargo.toml", "Cargo.toml");
 file::rename(".template/pyproject.toml", "pyproject.toml");
 file::delete(".template");

examples/plugin/.template/pre-script.rhai

@@ -1,4 +1,4 @@
-variable::set("PYO3_VERSION", "0.29.0");
+variable::set("PYO3_VERSION", "0.29.1");
 file::rename(".template/Cargo.toml", "Cargo.toml");
 file::rename(".template/plugin_api/Cargo.toml", "plugin_api/Cargo.toml");
 file::delete(".template");

examples/setuptools-rust-starter/.template/pre-script.rhai

@@ -1,4 +1,4 @@
-variable::set("PYO3_VERSION", "0.29.0");
+variable::set("PYO3_VERSION", "0.29.1");
 file::rename(".template/Cargo.toml", "Cargo.toml");
 file::rename(".template/setup.cfg", "setup.cfg");
 file::delete(".template");

examples/word-count/.template/pre-script.rhai

@@ -1,4 +1,4 @@
-variable::set("PYO3_VERSION", "0.29.0");
+variable::set("PYO3_VERSION", "0.29.1");
 file::rename(".template/Cargo.toml", "Cargo.toml");
 file::rename(".template/pyproject.toml", "pyproject.toml");
 file::delete(".template");

guide/src/building-and-distribution.md

@@ -28,8 +28,8 @@ An example output of doing this is shown below:
 
 ```console
 $ PYO3_PRINT_CONFIG=1 cargo build
-   Compiling pyo3-ffi v0.29.0 (/Users/goldbaum/Documents/pyo3/pyo3-ffi)
-error: failed to run custom build command for `pyo3-ffi v0.29.0 (/Users/goldbaum/Documents/pyo3/pyo3-ffi)`
+   Compiling pyo3-ffi v0.29.1 (/Users/goldbaum/Documents/pyo3/pyo3-ffi)
+error: failed to run custom build command for `pyo3-ffi v0.29.1 (/Users/goldbaum/Documents/pyo3/pyo3-ffi)`
 
 Caused by:
   process didn't exit successfully: `/Users/goldbaum/Documents/pyo3/target/debug/build/pyo3-ffi-71f0882ba738a1f0/build-script-build` (exit status: 101)