PyPI · #5372 most downloaded on PyPI

pythran

0.19.0524K downloads/moserge-sans-paille/pythran ↗New releases in your daily digest, changelog included.

Ahead of Time compiler for numeric kernels

Last release 1 months ago
17 Aug 2026
Ships fairly regularly
a new release about every 4 months
Rarely documented
notes for 5 of the last 60 stable releases
Nothing withdrawn
no release was ever pulled
14 years old
63 releases · first in 2012

Release timeline

63 releases since 2012

2012201420162018

Releases

0.19.017 Aug 2026
0.19.0 - Klask vioù e neizhioù warlene
0.19.0 - Klask vioù e neizhioù warlene
Open source →
0.18.115 Nov 2025
0.18.1 - an amzer a dro
0.18.1 - an amzer a dro
Open source →
Additional notes
This project publishes no release notes. Between 0.18.0 and 0.18.1 there were 46 commits, 46 of them substantive:

Add missing changelog entry for 0.18.0

Add missing operators to nditerator

Use more generic way of checking bool value of an object

Add support for numpy.frombuffer

Do not test binary mode of numpy.fromstring for recent numpy version

Adjust doc validation to recent python 3.13

Activate -D_GLIBCXX_DEBUG on CI

Avoid sharing between iterators during self-assign sliced list

Add missing iterator comparison operators

Gast is not doing its portability job for dumping

Force a more modern version of the compiler on Windows

Fix issue with linspace

[ci] Windows bot now have a modern clang-cl version

Be smart about combination of IndexableContainerType and ContainerOf

Do not try to be smart when computing default value type

Avoid conflict between ndarray (the function) and ndarray (the namespace)

Add support for passing types as pythran export parameters

Improve the normalization pass that removes keyword parameter

Move default compiler flag to C++14

Move from utils::make_index_sequence to std::make_index_sequence

…and 26 more.

0.18.023 May 2025

This project publishes no release notes. Between 0.17.0 and 0.18.0 there were 70 commits, 70 of them substantive:

This project publishes no release notes. Between 0.17.0 and 0.18.0 there were 70 commits, 70 of them substantive:

[doc] Reference https://github.com/conda-forge/miniforge for both Conda and Mamba installers
[constant folding] Correctly model restrict_assign in constant folding
Add basic support for type annotation
Restore type qualifiers dropped by b8cd84b5a5ab5222d65781a0194916ad555bf70c
[typing] Support union type in annotation
Provide user hint when trying to use c-style type names in pythran spec
Make sure blas function argument actually have an associated buffer
Remove any usage of PYTHRAN macro
Remove legacy logic that handled py2/py3 compatibility
Have pythran generate freethreading compatible code
Allow tuple with combinable items as array initializer
Fix interaction between static if and nested loop / function
Defer initialisation of global variables until the module is actually created
Fix pythran support for numpy.float128
Better modeling of analyse and transformations
Move GIL manipulation right after module creation
Have FastGExpr load its dependency in a lazy manner
ENH: improvements to pythran-config for build system integration
Adjust --cflags-pythran-only implementation
Fix test portability issue for ipython magic

…and 50 more.

0.17.031 Oct 2024

0.17.0 - bara pok ha pok

Open source →

Additional notes

This project publishes no release notes. Between 0.16.1 and 0.17.0 there were 44 commits, 44 of them substantive:

Add scipy-openblas support
Bump gast requirement to 0.6.0
Append version number to changelog summary lines
Make sure we have a decent optimization level for the C++ compilation step
Reduce complexity of forward substitution algorithm
Fix numpy.fix output type
Fix docstring and implementation of Interval.power
Remove dependency on setuptools for pythran -E
array module support: typecodes
array module support: array creation
array module support: tolist()
Rename types::array into types::array_tuple so that types::array can be used normally
array module support: append()
array module support: buffer_info()
array module support: byteswap()
array module support: count()
array module support: extend()
array module support: fromfile()
array module support: fromlist()
array module support: frombytes()

…and 24 more.

0.16.128 May 2024

This project publishes no release notes. Between 0.16.0 and 0.16.1 there were 3 commits, 3 of them substantive:

This project publishes no release notes. Between 0.16.0 and 0.16.1 there were 3 commits, 3 of them substantive:

Fix user manual sections
Fix massive memory leakage in all ndarray
\0.16.1 - piched

0.16.020 May 2024

This project publishes no release notes. Between 0.15.0 and 0.16.0 there were 38 commits, 38 of them substantive:

This project publishes no release notes. Between 0.15.0 and 0.16.0 there were 38 commits, 38 of them substantive:

Remove swap files
Read the docs update - .readthedocs.yaml
Support empty PYTHRANRC
Fix numpy bool type conversion, and properly support np.bool_
Centralize all pythran-managed allocation in one place
Provide --trace-allocations switch
Add missing baseid() method for sliced list
Fix constant folding in aug assign
Add missing descriptor for omp.set_num_threads
Allow taking the real/imag part of a numpy_iexpr
Support numpy.argsort kind keyword argument
Add support for numpy.vectorize
Move more exceptions to pythran.errors
Always lazily load pythran.types.tog
setuptools 62+ required to build
Add missing descr field in pythran/version.py
Test package distribution
Handle situation where we already have an incompatible scipy version installed
Add basic support for generation of ufunc
FIx leak on slices when converting a gexpr back to python

…and 18 more.

0.15.07 Jan 2024

fallañ ibil zo er c'harr a wigour da gentañ

Open source →

Additional notes

This project publishes no release notes. Between 0.14.0 and 0.15.0 there were 15 commits, 15 of them substantive:

Remove pytest.mark.module usage
Use a requirement file for test requirements
Support Python 3.12
Update icc github action
Avoid extra allocation when evaluation complex gexpr
Add support for clear for lists
Detect situation where functions are called as methods
Correctly handle overlapping detection between gexpr and vexpr
Move setup configuration to pyproject.toml
Upgrade xsimd to a48ab430d4b84ecd5449180ee1c6d2eed67c4191
Fix tuple + indexable_container combiner
Avoid redefining NPY_NO_DEPRECATED_API if already defined by user
Remove xsimd and boost from git ignore file
When failing to find pythran-openblas, default to none
\0.15.0 - ibil

0.14.06 Sept 2023

This project publishes no release notes. Between 0.13.1 and 0.14.0 there were 31 commits, 31 of them substantive:

This project publishes no release notes. Between 0.13.1 and 0.14.0 there were 31 commits, 31 of them substantive:

Fix filtering of empty sequence
When reserving data for list, enlarge increase capacity by a golden ratio
Add more docs about using Pythran in a Python package
Get rid of legacy OpenMP customization points
Support numpy.ndarray.view
Support taking a view on numpy_[itg]expr
Fix ambiguous value_type in enumerate
Provide a decent implementation of np.roll for multiple axes
Added test case _solve_toeplitz.py
Introduce pythran/pythonic/include/types/longdouble.hpp et cie
assertEquals was removed from unittest in Python 3.12
Use pythran logger instead of default logger to report absence of spec
Add missing std::forward
Loosen warning checks to take into account cython-generated code
Use npy_creal/npy_cimag from npy_math in from_python::convert
Cleaner exception handling when filling global tables
Do not include time in compiled metadata
Fix call to Py_BuildValue in module init
Fix call argument forward signature
Bump minimal clang requirement

…and 11 more.

0.13.12 May 2023

0.13.1 - bouc'hal levnet

Open source →

Additional notes

This project publishes no release notes. Between 0.13.0 and 0.13.1 there were 3 commits, 3 of them substantive:

Update xsimd to 11.0.0
Backport "Defer to (good) compiler the task of computing ln10" commit from xsimd
\0.13.1 - bouc'hal levnet

0.13.02 May 2023

This project publishes no release notes. Between 0.12.2 and 0.13.0 there were 27 commits, 26 of them substantive:

This project publishes no release notes. Between 0.12.2 and 0.13.0 there were 27 commits, 26 of them substantive:

Basic support of empty arrays
Backport 995ba19886255c84024afb5531154f314c840967 from xsimd
Do not generate trailing loop update if not needed
Get rid of unused functions warnings
Fix bad interaction between broadcasting, indexing and numpy expr
Fix simd version of argminmax
Improve and optimize numpy.array_split implementation
Perform early forward substitution to enable more inlining
New pattern: numpy.argmax(cst * expr) => numpy.argmax(expr) | cst > 0
Provide entry points pythran.import_pythrancode and pythran.import_pythranfile
Add missing documentation
Allow more expressions as numpy function parameters
Force internal linkage for the translated functions
Support downcasting numpy arrays
Raise Error when exporting a global as a function, or vice-versa
Upgrade notebook validation
Make sure an array of float32 added to a float64 scalar generates an array of float32
curse one letter typos of course!
Detect potential copyto usage and improve numpy.copyto support
Prevent ambigouous overload due to ADL

…and 6 more.