Default free threaded off

Signed-off-by: Bernát Gábor <[email protected]>

Author: gaborbernat

.github/workflows/check.yaml

@@ -23,6 +23,7 @@ jobs:
       fail-fast: false
       matrix:
         py:
+          - "3.14t"
           - "3.14"
           - "3.13"
           - "3.12"

src/tox/tox_env/python/api.py

@@ -7,6 +7,7 @@
 import sys
 import sysconfig
 from abc import ABC, abstractmethod
+from dataclasses import dataclass
 from pathlib import Path
 from typing import TYPE_CHECKING, Any, List, NamedTuple, cast
 
@@ -27,14 +28,15 @@ class VersionInfo(NamedTuple):
     serial: int
 
 
-class PythonInfo(NamedTuple):
+@dataclass(frozen=True)
+class PythonInfo:
     implementation: str
     version_info: VersionInfo
     version: str
-    free_threaded: bool
     is_64: bool
     platform: str
     extra: dict[str, Any]
+    free_threaded: bool = False
 
     @property
     def version_no_dot(self) -> str:

src/tox/tox_env/python/virtual_env/api.py

@@ -143,10 +143,10 @@ def _get_python(self, base_python: list[str]) -> PythonInfo | None:  # noqa: ARG
             implementation=interpreter.implementation,
             version_info=interpreter.version_info,
             version=interpreter.version,
-            free_threaded=interpreter.free_threaded,
             is_64=(interpreter.architecture == 64),  # noqa: PLR2004
             platform=interpreter.platform,
             extra={"executable": Path(interpreter.system_executable).resolve()},
+            free_threaded=interpreter.free_threaded,
         )
 
     def prepend_env_var_path(self) -> list[Path]:

tests/conftest.py

@@ -2,6 +2,7 @@
 
 import os
 import sys
+import sysconfig
 from pathlib import Path
 from typing import TYPE_CHECKING, Callable, Iterator, Protocol, Sequence
 from unittest.mock import patch
@@ -97,10 +98,10 @@ def get_python(self: VirtualEnv, base_python: list[str]) -> PythonInfo | None:
                 implementation=impl,
                 version_info=ver_info,
                 version="",
-                free_threaded=False,
                 is_64=True,
                 platform=sys.platform,
                 extra={"executable": Path(sys.executable)},
+                free_threaded=sysconfig.get_config_var("Py_GIL_DISABLED") == 1,
             )
 
         mocker.patch.object(VirtualEnv, "_get_python", get_python)

tox.toml

@@ -1,5 +1,5 @@
 requires = ["tox>=4.24.1"]
-env_list = ["fix", "3.14", "3.13", "3.12", "3.11", "3.10", "3.9", "cov", "type", "docs", "pkg_meta"]
+env_list = ["fix", "3.14t", "3.14", "3.13", "3.12", "3.11", "3.10", "3.9", "cov", "type", "docs", "pkg_meta"]
 skip_missing_interpreters = true
 
 [env_run_base]