🐛 fix(coverage): exclude tkinter test on 3.12 CI

Author: gaborbernat

tests/test_py_info_extra.py

@@ -14,11 +14,9 @@
 from py_discovery._py_info import VersionInfo
 
 try:
-    import tkinter as tk  # noqa: F401
-
-    _HAS_TKINTER = True
+    import tkinter as tk  # pragma: no cover
 except ImportError:  # pragma: no cover
-    _HAS_TKINTER = False
+    tk = None  # type: ignore[assignment]
 
 if TYPE_CHECKING:
     from pathlib import Path
@@ -53,12 +51,10 @@ def test_get_tcl_tk_libs_returns_tuple() -> None:
     assert tk is None or isinstance(tk, str)
 
 
-@pytest.mark.skipif(not _HAS_TKINTER, reason="tkinter not available")
-def test_get_tcl_tk_libs_tcl_error(mocker) -> None:
-    import tkinter as tk
-
+@pytest.mark.skipif(tk is None, reason="tkinter not available")
+def test_get_tcl_tk_libs_tcl_error(mocker) -> None:  # pragma: no cover
     mock_tcl = MagicMock()
-    mock_tcl.eval.side_effect = tk.TclError("fail")
+    mock_tcl.eval.side_effect = tk.TclError("fail")  # type: ignore[union-attr]
     mocker.patch("tkinter.Tcl", return_value=mock_tcl)
 
     tcl, _tk = PythonInfo._get_tcl_tk_libs()