Start testing Python 3.15

.github/workflows/docs.yml

@@ -44,7 +44,7 @@ jobs:
         with:
           python-version: '3.12'
       - name: Install tox
-        run: pip install tox==4.26.0
+        run: pip install tox==4.53.1
       - name: Setup tox environment
         run: tox run -e ${{ env.TOXENV }} --notest
       - name: Test

.github/workflows/test.yml

@@ -59,6 +59,12 @@ jobs:
           toxenv: py
           tox_extra_args: "-n 4"
           test_mypyc: true
+        - name: Test suite with py315-ubuntu, mypyc-compiled
+          python: '3.15'
+          os: ubuntu-24.04-arm
+          toxenv: py
+          tox_extra_args: "-n 4"
+          test_mypyc: true
         - name: Test suite with py314t-ubuntu, mypyc-compiled
           python: '3.14t'
           os: ubuntu-24.04-arm
@@ -196,6 +202,7 @@ jobs:
       if: ${{ !(matrix.debug_build || endsWith(matrix.python, '-dev')) }}
       with:
         python-version: ${{ matrix.python }}
+        allow-prereleases: true
 
     - name: Install tox
       run: |
@@ -206,7 +213,7 @@ jobs:
         echo debug build; python -c 'import sysconfig; print(bool(sysconfig.get_config_var("Py_DEBUG")))'
         echo os.cpu_count; python -c 'import os; print(os.cpu_count())'
         echo os.sched_getaffinity; python -c 'import os; print(len(getattr(os, "sched_getaffinity", lambda *args: [])(0)))'
-        pip install tox==4.26.0
+        pip install tox==4.53.1
 
     - name: Compiled with mypyc
       if: ${{ matrix.test_mypyc }}
@@ -271,7 +278,7 @@ jobs:
           default: 3.11.1
           command: python -c "import platform; print(f'{platform.architecture()=} {platform.machine()=}');"
       - name: Install tox
-        run: pip install tox==4.26.0
+        run: pip install tox==4.53.1
       - name: Setup tox environment
         run: tox run -e py --notest
       - name: Test

mypyc/test-data/run-misc.test

@@ -971,7 +971,10 @@ print(z)
 [case testCheckVersion]
 import sys
 
-if sys.version_info[:2] == (3, 15):
+if sys.version_info[:2] == (3, 16):
+    def version() -> int:
+        return 16
+elif sys.version_info[:2] == (3, 15):
     def version() -> int:
         return 15
 elif sys.version_info[:2] == (3, 14):

mypyc/test-data/run-python312.test

@@ -229,9 +229,10 @@ type C[*Ts] = tuple[*Ts]
 def test_type_var_tuple_type_alias() -> None:
     if sys.version_info >= (3, 15):   # type: ignore[operator]
         assert str(C[int, str]) == "_frozen_importlib.C[int, str]"
+        assert str(getattr(C, "__value__")) == "tuple[typing.Unpack[~Ts]]"
     else:
         assert str(C[int, str]) == "C[int, str]"
-    assert str(getattr(C, "__value__")) == "tuple[typing.Unpack[Ts]]"
+        assert str(getattr(C, "__value__")) == "tuple[typing.Unpack[Ts]]"
 
 type D[**P] = Callable[P, int]
 

mypyc/test/test_emit.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import sys
 import unittest
 
 from mypyc.codegen.emit import Emitter, EmitterContext
@@ -42,7 +43,12 @@ def test_reg(self) -> None:
 
     def test_object_annotation(self) -> None:
         assert self.emitter.object_annotation("hello, world", "line;") == " /* 'hello, world' */"
-        assert self.emitter.object_annotation(list(range(30)), "line;") == """\
+        if sys.version_info >= (3, 15):
+            assert self.emitter.object_annotation(list(range(30)), "line;") == """\
+ /* [   0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,
+            23, 24, 25, 26, 27, 28, 29] */"""
+        else:
+            assert self.emitter.object_annotation(list(range(30)), "line;") == """\
  /* [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,
          23, 24, 25, 26, 27, 28, 29] */"""
 
@@ -57,7 +63,12 @@ def test_emit_line(self) -> None:
         emitter.emit_line("CPyStatics[0];", ann="hello, world")
         emitter.emit_line("CPyStatics[1];", ann=list(range(30)))
         assert emitter.fragments[0] == "CPyStatics[0]; /* 'hello, world' */\n"
-        assert emitter.fragments[1] == """\
+        if sys.version_info >= (3, 15):
+            assert emitter.fragments[1] == """\
+CPyStatics[1]; /* [   0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
+                     20, 21, 22, 23, 24, 25, 26, 27, 28, 29] */\n"""
+        else:
+            assert emitter.fragments[1] == """\
 CPyStatics[1]; /* [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
                   21, 22, 23, 24, 25, 26, 27, 28, 29] */\n"""
 

test-requirements.txt

@@ -32,7 +32,7 @@ mypy-extensions==1.1.0
     # via -r mypy-requirements.txt
 nodeenv==1.9.1
     # via pre-commit
-packaging==25.0
+packaging==26.2
     # via pytest
 pathspec==1.0.0
     # via -r mypy-requirements.txt
@@ -46,7 +46,7 @@ pre-commit==4.3.0
     # via -r test-requirements.in
 psutil==7.1.0
     # via -r test-requirements.in
-pygments==2.19.2
+pygments==2.20.0
     # via pytest
 pytest==8.4.2
     # via

tox.ini

@@ -7,6 +7,7 @@ envlist =
     py312,
     py313,
     py314,
+    py315,
     docs,
     lint,
     type,