Upgrade to Cython 3

.github/workflows/tests-and-linters.yml

@@ -40,8 +40,7 @@ jobs:
     name: Run tests with coverage
     runs-on: ubuntu-latest
     env:
-      # Cython's version <3 issue with tracing: "error: no member named 'use_tracing' in 'struct _PyCFrame'"
-      # DEPENDENCY_INJECTOR_DEBUG_MODE: 1
+      DEPENDENCY_INJECTOR_DEBUG_MODE: 1
       COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
@@ -49,7 +48,7 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: 3.12
-      - run: pip install tox cython==0.29.37
+      - run: pip install tox 'cython>=3,<4'
       - run: make cythonize
       - run: tox
         env:

Makefile

@@ -2,7 +2,7 @@ VERSION := $(shell python setup.py --version)
 
 CYTHON_SRC := $(shell find src/dependency_injector -name '*.pyx')
 
-CYTHON_DIRECTIVES = -Xlanguage_level=2
+CYTHON_DIRECTIVES = -Xlanguage_level=3
 
 ifdef DEPENDENCY_INJECTOR_DEBUG_MODE
 	CYTHON_DIRECTIVES += -Xprofile=True

requirements-dev.txt

@@ -1,4 +1,4 @@
-cython==0.29.37
+cython>=3,<4
 pytest
 pytest-asyncio
 tox

requirements-ext.txt

@@ -1,3 +1,3 @@
 flask==2.1.3
 werkzeug==2.2.2
-aiohttp==3.9.0b1
+aiohttp

tox.ini

@@ -28,7 +28,7 @@ passenv = GITHUB_*, COVERALLS_*
 basepython=python3.12
 deps=
     {[testenv]deps}
-    cython<3.0
+    cython>=3,<4
     coverage
     coveralls
 commands=