From 9546fe2ef2db921709f3cb355b33bba977658672 Mon Sep 17 00:00:00 2001
From: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Date: Mon, 27 Jan 2025 16:24:10 +0200
Subject: gh-129061: Fix `FORCE_COLOR` and `NO_COLOR` when empty strings
 (#129140)

---
 Lib/_colorize.py                                                      | 4 ++--
 Lib/test/test__colorize.py                                            | 2 ++
 .../next/Library/2025-01-21-18-52-32.gh-issue-129061.4idD_B.rst       | 1 +
 3 files changed, 5 insertions(+), 2 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Library/2025-01-21-18-52-32.gh-issue-129061.4idD_B.rst

diff --git a/Lib/_colorize.py b/Lib/_colorize.py
index 5e36e45..41e818f 100644
--- a/Lib/_colorize.py
+++ b/Lib/_colorize.py
@@ -42,11 +42,11 @@ def can_colorize(*, file=None) -> bool:
             return False
         if os.environ.get("PYTHON_COLORS") == "1":
             return True
-    if "NO_COLOR" in os.environ:
+    if os.environ.get("NO_COLOR"):
         return False
     if not COLORIZE:
         return False
-    if "FORCE_COLOR" in os.environ:
+    if os.environ.get("FORCE_COLOR"):
         return True
     if os.environ.get("TERM") == "dumb":
         return False
diff --git a/Lib/test/test__colorize.py b/Lib/test/test__colorize.py
index ff15d83..056a530 100644
--- a/Lib/test/test__colorize.py
+++ b/Lib/test/test__colorize.py
@@ -44,8 +44,10 @@ class TestColorizeFunction(unittest.TestCase):
                 check({'TERM': ''}, fallback, fallback)
                 check({'FORCE_COLOR': '1'}, fallback, True)
                 check({'FORCE_COLOR': '0'}, fallback, True)
+                check({'FORCE_COLOR': ''}, fallback, fallback)
                 check({'NO_COLOR': '1'}, fallback, False)
                 check({'NO_COLOR': '0'}, fallback, False)
+                check({'NO_COLOR': ''}, fallback, fallback)
 
             check({'TERM': 'dumb', 'FORCE_COLOR': '1'}, False, True)
             check({'FORCE_COLOR': '1', 'NO_COLOR': '1'}, True, False)
diff --git a/Misc/NEWS.d/next/Library/2025-01-21-18-52-32.gh-issue-129061.4idD_B.rst b/Misc/NEWS.d/next/Library/2025-01-21-18-52-32.gh-issue-129061.4idD_B.rst
new file mode 100644
index 0000000..5c5c05e
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-01-21-18-52-32.gh-issue-129061.4idD_B.rst
@@ -0,0 +1 @@
+Fix FORCE_COLOR and NO_COLOR when empty strings. Patch by Hugo van Kemenade.
-- 
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