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Enable free-threading in cython extensions #676

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083ff18
Enable free-threading in cython extensions
djhoese Aug 14, 2025
e8b15a0
Add free-threading classifier to setup.py
djhoese Aug 14, 2025
f489766
Fix Python 3.14 compatibility
djhoese Nov 6, 2025
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2 changes: 1 addition & 1 deletion pyresample/_spatial_mp.py
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Original file line number Diff line number Diff line change
Expand Up @@ -188,7 +188,7 @@ def _run_jobs(target, args, nprocs):
p.join()
if ierr.value != 0:
raise RuntimeError('%d errors in worker processes. Last one reported:\n%s' %
(ierr.value, warn_msg.value._object_hook()))
(ierr.value, warn_msg.value))

# This is executed in an external process:

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20 changes: 11 additions & 9 deletions setup.py
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Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,7 @@
import versioneer

requirements = ['pyproj>=3.0', 'configobj',
'pykdtree>=1.3.1', 'pyyaml', 'numpy>=1.21.0',
'pykdtree>=1.3.1', 'pyyaml', 'numpy>=1.25.0',
"shapely", "donfig", "platformdirs",
]

Expand Down Expand Up @@ -55,24 +55,24 @@
Extension("pyresample.ewa._ll2cr", sources=["pyresample/ewa/_ll2cr.pyx"],
include_dirs=[np.get_include()],
extra_compile_args=extra_compile_args,
cython_directives={"language_level": 3},
define_macros=[("NPY_NO_DEPRECATED_API", "NPY_1_7_API_VERSION")],
cython_directives={"language_level": 3, "freethreading_compatible": True},
define_macros=[("NPY_NO_DEPRECATED_API", "NPY_1_25_API_VERSION")],
),
Extension("pyresample.ewa._fornav",
sources=["pyresample/ewa/_fornav.pyx",
"pyresample/ewa/_fornav_templates.cpp"],
include_dirs=[np.get_include()],
language="c++", extra_compile_args=extra_compile_args,
depends=["pyresample/ewa/_fornav_templates.h"],
cython_directives={"language_level": 3},
define_macros=[("NPY_NO_DEPRECATED_API", "NPY_1_7_API_VERSION")],
cython_directives={"language_level": 3, "freethreading_compatible": True},
define_macros=[("NPY_NO_DEPRECATED_API", "NPY_1_25_API_VERSION")],
),
Extension("pyresample.gradient._gradient_search",
sources=["pyresample/gradient/_gradient_search.pyx"],
include_dirs=[np.get_include()],
extra_compile_args=extra_compile_args,
cython_directives={"language_level": 3},
define_macros=[("NPY_NO_DEPRECATED_API", "NPY_1_7_API_VERSION")],
cython_directives={"language_level": 3, "freethreading_compatible": True},
define_macros=[("NPY_NO_DEPRECATED_API", "NPY_1_25_API_VERSION")],
),
]

Expand Down Expand Up @@ -106,13 +106,15 @@
ext_modules=extensions,
entry_points=entry_points,
zip_safe=False,
license="LGPL-3.0-or-later",
license_files=["LICENSE.txt"],
classifiers=[
'Development Status :: 5 - Production/Stable',
'License :: OSI Approved :: GNU Lesser General Public License v3 or later (LGPLv3+)',
'Programming Language :: Python',
'Programming Language :: Cython',
'Operating System :: OS Independent',
'Intended Audience :: Science/Research',
'Topic :: Scientific/Engineering'
'Topic :: Scientific/Engineering',
'Programming Language :: Python :: Free Threading :: 1 - Unstable',
]
)
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