Increase minimum Cython version to 3.1 everywhere (#211)

* Initial plan

* Increase minimum Cython version to 3.1 everywhere

Co-authored-by: timosachsenberg <5803621+timosachsenberg@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: timosachsenberg <5803621+timosachsenberg@users.noreply.github.com>

Author: Copilot

.github/workflows/ci-autowrap.yaml

@@ -15,12 +15,6 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - CYTHON: "==3.0.0"
-            python-version: "3.10"
-          - CYTHON: "==3.0.0"
-            python-version: "3.11"
-          - CYTHON: "==3.0.0"
-            python-version: "3.12"
           - CYTHON: "==3.1.0"
             python-version: "3.10"
           - CYTHON: "==3.1.0"

autowrap/__init__.py

@@ -46,10 +46,12 @@
     _cython_version = "0"
 else:
     try:
-        _major_str = str(_cython_version).split(".")[0]
-        if int(_major_str) < 3:
+        _version_parts = str(_cython_version).split(".")
+        _major = int(_version_parts[0])
+        _minor = int(_version_parts[1]) if len(_version_parts) > 1 else 0
+        if _major < 3 or (_major == 3 and _minor < 1):
             raise RuntimeError(
-                "autowrap requires Cython >= 3.0; found Cython %s" % _cython_version
+                "autowrap requires Cython >= 3.1; found Cython %s" % _cython_version
             )
     except Exception:
         # If parsing the version fails for some reason, do not block import here.

pyproject.toml

@@ -29,7 +29,7 @@ classifiers = [
 ]
 requires-python = ">=3.9"
 dependencies = [
-    "Cython>=3.0",
+    "Cython>=3.1",
     "setuptools",
 ]
 

tests/test_cython_version.py

@@ -1,7 +1,11 @@
 from Cython.Compiler.Version import version as cython_version
 
 
-def test_cython_major_version_at_least_3() -> None:
-    major_str = str(cython_version).split(".")[0]
-    assert int(major_str) >= 3
+def test_cython_version_at_least_3_1() -> None:
+    version_parts = str(cython_version).split(".")
+    major = int(version_parts[0])
+    minor = int(version_parts[1]) if len(version_parts) > 1 else 0
+    assert major > 3 or (major == 3 and minor >= 1), (
+        f"Expected Cython >= 3.1, but found {cython_version}"
+    )
 

tests/test_files/inherited.pyx

@@ -1,4 +1,4 @@
-#Generated with autowrap 0.23.0 and Cython (Parser) 3.2.0
+#Generated with autowrap 0.23.0 and Cython (Parser) 3.2.1
 #cython: c_string_encoding=ascii
 #cython: embedsignature=False
 from  enum            import Enum as _PyEnum