Support Cython 3 where available

We currently support Python interpreters 3.7 and newer, and Cython 3 supports Python interpreters 3.8 and newer. This patch updates the pip dependencies dependencies to prefer Cython 3 for interpreters 3.8 and newer, keeping the older version of Cython as a dependency for interpreter 3.7. Signed-off-by: Patrick M. Niedzielski <[email protected]>
bloomberg · Jan 11, 2024 · 75e90f1 · 75e90f1
1 parent 8501bd8
commit 75e90f1
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diff --git a/news/18.feature.rst b/news/18.feature.rst
@@ -0,0 +1 @@
+Support building with Cython 3
diff --git a/pyproject.toml b/pyproject.toml
@@ -1,9 +1,10 @@
 [build-system]
 
-requires = ["setuptools>=39.2.0",
-            "cython>=0.28.4",
-            "wheel>=0.31.0",
-            "pkgconfig>1.5.0"]
+requires = ['setuptools>=39.2.0',
+            'Cython>=0.28.4, <3; python_version < "3.8"',
+            'Cython >= 3, <4; python_version >= "3.8"',
+            'wheel>=0.31.0',
+            'pkgconfig>1.5.0']
 
 build-backend = "setuptools.build_meta"
 

diff --git a/requirements-test-coverage.txt b/requirements-test-coverage.txt
@@ -1,3 +1,4 @@
 -r requirements-test.txt
 pytest-cov
-Cython
+Cython >= 0.29, <3; python_version < "3.8"
+Cython >=3, <4; python_version >= "3.8"