[3.15] gh-150994: _colorize: modernize typing imports (GH-151018) (#152041)

gh-150994: _colorize: modernize typing imports (GH-151018)
(cherry picked from commit fcda96f)

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>

Author: miss-islington

Lib/_colorize.py

@@ -4,14 +4,12 @@
 
 from collections.abc import Callable, Iterator, Mapping
 from dataclasses import dataclass, field, Field
+lazy from typing import IO, Literal, Self, ClassVar
 
 COLORIZE = True
 
-
-# types
-if False:
-    from typing import IO, Literal, Self, ClassVar
-    _theme: Theme
+_theme: Theme
+type BackgroundStyle = Literal["dark", "light"]
 
 
 class ANSIColors:
@@ -319,7 +317,7 @@ class LiveProfiler(ThemeSection):
     medal_bronze_fg: int = CursesColors.GREEN
 
     # Background style: 'dark' or 'light'
-    background_style: Literal["dark", "light"] = "dark"
+    background_style: BackgroundStyle = "dark"
 
 
 LiveProfilerLight = LiveProfiler(

Lib/test/test__colorize.py

@@ -28,7 +28,7 @@ class TestImportTime(unittest.TestCase):
     @cpython_only
     def test_lazy_import(self):
         import_helper.ensure_lazy_imports(
-            "_colorize", {"copy", "re", "inspect"}
+            "_colorize", {"copy", "re", "inspect", "typing"}
         )
 
 

Misc/NEWS.d/next/Library/2026-06-06-06-29-17.gh-issue-150994.I2119M.rst

@@ -0,0 +1 @@
+Make the type annotations in the private ``_colorize`` module resolvable.

Misc/NEWS.d/next/Library/2026-06-11-06-56-31.gh-issue-150994.gd1wVw.rst

@@ -0,0 +1 @@
+Make type annotations in the private ``_colorize`` module resolvable.